Encyclopedia Astronautica
Vandenberg SLC2E


Delta launch complex. Originally a Thor 75 SMS launch pad. Upgraded to a space launch complex in 1966.

Longitude: -120.6193 deg.
Latitude: 34.7516 deg.
First Launch: 1958.12.16.
Last Launch: 1972.03.12.
Number: 52 .

More... - Chronology...


Associated Spacecraft
  • Transit American navigation satellite. 46 launches, 1959.09.17 (Transit 1A) to 1988.08.25 (Transit O-31). The Transit Navigation System began development in 1958. More...
  • GRAB American military naval signals reconnaisance satellite. 9 launches, 1960.04.13 (Dummy subsatellite) to 1965.03.09 (Solrad 7B). GRAB, the first US electronic intelligence (ELINT) satellite, was not declassified until June 1998. More...
  • KH-2 American military surveillance satellite. 10 launches, 1960.10.26 (SRV 506) to 1961.08.04 (SRV 512). Early US reconnaissance satellite. Carried one 'C-Prime' panoramic camera, with a focal length of 61 cm and a ground resolution of 9 m. More...
  • KH-5 American military surveillance satellite. 16 launches, 1961.02.17 (Discoverer 20) to 1964.08.21 (KH-5 9066A). US mapping satellite. Carried one frame camera, with a focal length of 76 mm, and a ground resolution of 140 m. More...
  • Lofti American communications technology satellite. 2 launches, 1961.02.22 (Lofti) and 1963.06.15 (Lofti 2A). The Low Frequency Trans-Ionospheric (LOFTI) satellites were produced as a cooperative effort with the Radio Division. More...
  • Injun American earth magnetosphere satellite. 5 launches, 1961.06.29 (Injun 1) to 1968.08.08 (Explorer 40). Radiation decay data satellite. May also have been a cover for some NRL ELINT satellites. More...
  • KH-3 American military surveillance satellite. 12 launches, 1961.08.30 (Discoverer 29) to 1962.01.13 (SRV 571). Early US reconnaissance satellite. Carried one 'C-Double Prime' panoramic camera, with a focal length of 61 cm and a ground resolution of 7.6 m. More...
  • SECOR American earth geodetic satellite. 13 launches, 1962.01.24 (Secor) to 1969.04.14 (SECOR 13). More...
  • SURCAL American military target satellite. 15 launches, 1962.01.24 (Surcal) to 1969.09.30 (Surcal). More...
  • Ferret American military naval signals reconnaisance satellite. 19 launches, 1962.02.21 (Ferret 1) to 1971.07.16 (OPS 8373). More...
  • KH-4 American military surveillance satellite. 31 launches, 1962.02.27 (Discoverer 38) to 1963.12.21 (KH-4 9062). Early US reconnaissance satellite. Carried two 'Mural' panoramic cameras, with a focal length of 61 cm, and a ground resolution of 7.6 m. More...
  • Alouette Canadian earth magnetosphere satellite. 2 launches, 1962.09.29 (Alouette 1) and 1965.11.29 (Alouette 2). Ionospheric research. More...
  • TAVE American technology satellite. One launch, 1962.09.29. Thor Agena Vibration Experiment More...
  • NRL ELINT American military naval signals reconnaisance satellite. 6 launches, 1962.12.13 (Black Sphere) to 1969.09.30 (Surcal). NRL ELINT satellite. More...
  • RADOSE American earth magnetosphere satellite. One launch, 1963.06.15. Radiation dosimeter measurements. More...
  • KH-4A American military surveillance satellite. 70 launches, 1963.08.25 (KH-4A 1001) to 1969.09.22 (SRV 743R). Early US reconnaissance satellite. Carried two 'J-1' panoramic cameras, with a focal length of 61 cm, and a ground resolution of 2.7 m. More...
  • IMP American earth magnetosphere satellite. 10 launches, 1963.11.27 (Explorer 18) to 1973.10.26 (Explorer 50). More...
  • Echo 2 American passive communications satellite. One launch, 1964.01.25. Passive communications satellite; balloon; 1st joint US/USSR space mission. More...
  • Nimbus American earth weather satellite. 8 launches, 1964.08.28 (Nimbus 1) to 1978.10.13 (Nimbus 7). More...
  • OGO American earth magnetosphere satellite. 6 launches, 1964.09.05 (OGO 1) to 1969.06.05 (OGO 6). More...
  • Calsphere American military target satellite. 11 launches, 1964.10.06 (Calsphere 1) to 1971.02.17 (Calsphere 5). Radar calibration objects (but also cover for other classified subsatellites). More...
  • DODECAPOLE American military target satellite. 2 launches, 1965.03.09 (DODECAPOLE 1/Porcupine 1) and 1965.08.13 (Dodecapole 2). More...
  • Tempsat American military target satellite. 2 launches, 1965.08.13 (Tempsat 1) and 1969.09.30 (Tempsat 2). Surveillance Calibration; black 14 inch diameter. sphere. More...
  • GEOS American solar satellite. 3 launches, 1965.11.06 (Explorer 29) to 1975.04.09 (Geos 3). The GEOS spacecraft were gravity-gradient-stabilized, solar-cell powered satellites designed exclusively for geodetic studies. More...
  • DME American earth ionosphere satellite. One launch, 1965.11.29, Explorer 31. Explorer 31, the Direct Measurement Explorer, was launched with a Canadian Alouette II on November 28, 1965, on a Thor-Agena rocket from Vandenberg Air Force Base, California. More...
  • Pageos American earth geodetic satellite. 3 launches, 1966.06.24 (Pageos 1) to (Pageos canister half). 100 foot diameter. balloon. More...
  • TOS American earth weather satellite. 7 launches, 1966.10.02 (ESSA 3) to 1969.02.26 (ESSA 9). TOS spacecraft marked the first operational system of US polar-orbiting meteorological satellites. More...
  • RAE American radio astronomy satellite. 2 launches, 1968.07.04 (Explorer 38) to 1973.06.10 (Explorer 49). More...
  • HEOS European earth magnetosphere satellite. 2 launches, 1968.12.05 (HEOS 1) and 1972.01.31 (HEOS 2). Highly Eccentric Orbiting Satellite; examined magnetic fields outside of Earth's magnetosphere. More...
  • Isis Canadian earth magnetosphere satellite. 2 launches, 1969.01.30 (Isis 1) and 1971.04.01 (Isis 2). Ionospheric measurements; data correlated with measurements from Alouette 1. More...
  • ITOS American earth weather satellite. 8 launches, 1970.01.23 (ITOS 1) to 1976.07.29 (NOAA 5). ITOS was the follow-on to the TIROS series of polar-orbiting US weather satellites, and marked the beginning of the use of the NOAA designator. More...
  • SERT American ion engine technology satellite. One launch, 1970.02.04. Electric ion engine tests. More...
  • TOPO American earth geodetic satellite. One launch, 1970.04.08. US Army topographic / geodesic satellite launched in 1970. More...
  • TD-1A European technology satellite. One launch, 1972.03.12. Sixth satellite of ESRO. More...

Associated Launch Vehicles
  • Thor Able-Star American orbital launch vehicle. As Thor Able but with enlarged Ablestar second stage with 2 1/2 x greater burn time. More...
  • Thor Agena B American orbital launch vehicle. Two stage vehicle consisting of 1 x Thor DM-21 + 1 x Agena B More...
  • Thor Agena D American orbital launch vehicle. Two stage vehicle consisting of 1 x Thor DM-21 + 1 x Agena D More...
  • Delta E American orbital launch vehicle. Thor augmented with 3 x Castor 2 motors with Delta E and Altair 2 upper stage. More...
  • Delta E1 American orbital launch vehicle. Four stage vehicle consisting of 3 x Castor + 1 x Thor DSV-2C + 1 x Delta E + 1 x FW4D More...
  • Delta J American orbital launch vehicle. Four stage vehicle consisting of 3 x Castor + 1 x Thor DSV-2C + 1 x Delta E + 1 x Star 37D More...
  • Delta N American orbital launch vehicle. Long Tank Thor augmented with 3 Castor 2 boosters and Delta E upper stage. More...
  • Thorad Agena D SLV-2H Thor Agena upgraded with Long Tank Thor stage. Variant with straight tank from Delta was Thorad (Long Tank Augmented Thrust Thor Delta) More...
  • Delta L American orbital launch vehicle. Four stage vehicle consisting of 3 x Castor 2 + 1 x LT Thor DSV-2L-1B + 1 x Delta E + 1 x FW4D More...
  • Delta N6 American orbital launch vehicle. Three stage vehicle consisting of 6 x Castor 2 + 1 x LT Thor DSV-2L-1C + 1 x Delta E More...

Associated Launch Sites
  • Vandenberg Vandenberg Air Force Base is located on the Central Coast of California about 240 km northwest of Los Angeles. It is used for launches of unmanned government and commercial satellites into polar orbit and intercontinental ballistic missile test launches toward the Kwajalein Atoll. More...

Vandenberg SLC2E Chronology


1958 December 16 - . 23:44 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor DM-18A. LV Configuration: Thor DM-18A 151.
  • Operational missile test - . Nation: USA. Agency: USAF. Apogee: 520 km (320 mi). Summary: Two Thor shots, one from Cape Canaveral and one from Vandenberg AFB, were successful. Intermediate range ballistic missile portion of PMR was inaugurated with successful firing of USAF Thor from Vandenberg AFB..

1959 August 3 - . 21:41 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor DM-18A. LV Configuration: Thor DM-18A 175.
  • IWST - . Nation: USA. Agency: RAF. Apogee: 520 km (320 mi).

1959 October 21 - . 22:57 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor DM-18A. LV Configuration: Thor DM-18A 220.
  • IWST - . Nation: USA. Agency: RAF. Apogee: 520 km (320 mi).

1959 December 2 - . 05:29 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor DM-18A. LV Configuration: Thor DM-18A 265. FAILURE: Failure. Failed Stage: 1.
  • Combat training launch - . Nation: USA. Agency: RAF. Apogee: 0 km ( mi).

1961 June 16 - . 23:02 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena B. LV Configuration: Thor Agena B 303 / Agena B 1107.
  • Discoverer 25 - . Payload: KH-2 9017 / Agena B 1107. Mass: 1,150 kg (2,530 lb). Nation: USA. Agency: USAF. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-2. Decay Date: 1961-07-12 . USAF Sat Cat: 108 . COSPAR: 1961-Xi-1. Apogee: 404 km (251 mi). Perigee: 222 km (137 mi). Inclination: 82.1000 deg. Period: 90.80 min. Summary: KH-2; film capsule recovered 2.1 days later. Capsule recovered from water on orbit 32. Streaks throughout film..

1961 August 4 - . 00:01 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena B. LV Configuration: Thor Agena B 309 / Agena B 1111. FAILURE: Failure. Failed Stage: U.
  • Discoverer 28 - . Payload: KH-2 9021. Mass: 1,150 kg (2,530 lb). Nation: USA. Agency: USAF. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-2. Decay Date: 1961-08-03 . COSPAR: F610804A. Summary: KH-2; Mission failed..
  • SRV 512 - . Nation: USA. Agency: USAF. Spacecraft: KH-2. COSPAR: F610804B.

1961 September 17 - . 21:00 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena B. LV Configuration: Thor Agena B 324 / Agena B 1114.
  • Discoverer 31 - . Payload: KH-3 s/n 9024 / Agena B 1114. Mass: 1,150 kg (2,530 lb). Nation: USA. Agency: USAF. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-3. Decay Date: 1961-10-26 . USAF Sat Cat: 186 . COSPAR: 1961-A-Beta-1. Apogee: 403 km (250 mi). Perigee: 231 km (143 mi). Inclination: 82.6000 deg. Period: 90.80 min. Summary: KH-3; film capsule recovery failed. Mission failed. Power failure and loss of control gas on orbit 33..

1961 November 5 - . 20:00 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena B. LV Configuration: Thor Agena B 330 / Agena B 1117.
  • Discoverer 34 - . Payload: KH-3 s/n 9027 / Agena B 1117. Mass: 1,150 kg (2,530 lb). Nation: USA. Agency: USAF. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-3. Decay Date: 1962-12-07 . USAF Sat Cat: 197 . COSPAR: 1961-A-Epsilon-1. Apogee: 859 km (533 mi). Perigee: 231 km (143 mi). Inclination: 82.4000 deg. Period: 95.60 min. Summary: KH-3; film capsule recovery not attempted. Mission failed. Improper launch angle resulted in extreme orbit..
  • SRV 553 - . Nation: USA. Agency: USAF. Spacecraft: KH-3. COSPAR: 1961-A-Epsilon-x.

1962 May 30 - . 01:00 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena B. LV Configuration: Thor Agena B 336 / Agena B 1128.
  • KH-4 9035 - . Payload: KH-4 s/n 9035 / Agena B 1128. Mass: 1,150 kg (2,530 lb). Nation: USA. Agency: USAF. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4. Decay Date: 1962-06-11 . USAF Sat Cat: 302 . COSPAR: 1962-Phi-1. Apogee: 350 km (210 mi). Perigee: 192 km (119 mi). Inclination: 74.1000 deg. Period: 89.90 min. Summary: KH-4; film capsule recovered 3.1 days later. Slight corona static on film..

1962 June 28 - . 01:09 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena D. LV Configuration: Thor Agena D 340 / Agena D 1151.
  • KH-4 9038 - . Payload: KH-4 s/n 9038 / Agena D 1151. Mass: 1,150 kg (2,530 lb). Nation: USA. Agency: USAF. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4. Decay Date: 1962-09-14 . USAF Sat Cat: 316 . COSPAR: 1962-A-Gamma-1. Apogee: 698 km (433 mi). Perigee: 205 km (127 mi). Inclination: 76.0000 deg. Period: 93.60 min. Summary: KH-4; film capsule recovered 4.1 days later. Severe corona static..

1962 August 2 - . 00:17 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena D. LV Configuration: Thor Agena D 344 / Agena D 1152.
  • KH-4 9041 - . Payload: KH-4 s/n 9041 / Agena D 1152. Mass: 1,150 kg (2,530 lb). Nation: USA. Agency: USAF. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4. Decay Date: 1962-08-22 . USAF Sat Cat: 360 . COSPAR: 1962-A-Kappa-1. Apogee: 423 km (262 mi). Perigee: 212 km (131 mi). Inclination: 83.0000 deg. Period: 90.80 min. Summary: KH-4; film capsule recovered 4.1 days later. Severe corona and radiation fog..

1962 September 29 - . 06:05 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena B. LV Configuration: Thor Agena B 341 (TA1).
  • Alouette 1 - . Payload: Alouette 1 / TAVE. Mass: 145 kg (319 lb). Nation: Canada. Agency: Clemson. Class: Earth. Type: Magnetosphere satellite. Spacecraft: Alouette. USAF Sat Cat: 424 . COSPAR: 1962-B-Alpha-1. Apogee: 1,022 km (635 mi). Perigee: 987 km (613 mi). Inclination: 80.5000 deg. Period: 105.20 min. Summary: Ionospheric research. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B). .
  • TAVE - . Payload: TAVE. Nation: USA. Agency: NASA. Spacecraft: TAVE. USAF Sat Cat: 426 . COSPAR: 1962-B-Alpha-2. Apogee: 1,019 km (633 mi). Perigee: 993 km (617 mi). Inclination: 80.5000 deg. Period: 105.20 min. Summary: Thor Agena Vibration Experiment.

1962 December 13 - . 04:07 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena D. LV Configuration: Thor Agena D 365 / Agena D 2351.
  • Black Sphere - . Payload: NRL PL120. Mass: 23 kg (50 lb). Nation: USA. Agency: USAF; USN. Program: ELINT. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: NRL ELINT. Decay Date: 1967-02-09 . USAF Sat Cat: 502 . COSPAR: 1962-B-Tau-1. Apogee: 2,385 km (1,481 mi). Perigee: 230 km (140 mi). Inclination: 70.3000 deg. Period: 111.80 min. Summary: Identified by McDowell as probable NRL ELINT satellite..
  • Injun 3 - . Mass: 52 kg (114 lb). Nation: USA. Agency: USAF; USN. Class: Earth. Type: Magnetosphere satellite. Spacecraft: Injun. Decay Date: 1968-08-25 . USAF Sat Cat: 504 . COSPAR: 1962-B-Tau-2. Apogee: 2,406 km (1,495 mi). Perigee: 240 km (140 mi). Inclination: 70.3000 deg. Period: 112.10 min. Summary: Radiation decay data. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .
  • SURCAL 2A - . Payload: NRL PL121. Mass: 3.00 kg (6.60 lb). Nation: USA. Agency: USAF; USN. Class: Military. Type: Radar calibration target. Spacecraft: SURCAL. Decay Date: 1963-07-01 . USAF Sat Cat: 507 . COSPAR: 1962-B-Tau-3. Apogee: 2,762 km (1,716 mi). Perigee: 222 km (137 mi). Inclination: 70.2000 deg. Period: 115.80 min. Summary: Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .
  • Calsphere 1A - . Payload: NRL ELINT. Mass: 23 kg (50 lb). Nation: USA. Agency: USAF; USN. Program: ELINT. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: NRL ELINT. Decay Date: 1967-02-05 . USAF Sat Cat: 513 . COSPAR: 1962-B-Tau-5. Apogee: 2,069 km (1,285 mi). Perigee: 228 km (141 mi). Inclination: 70.3000 deg. Period: 108.40 min. Summary: Identified by McDowell as probable NRL ELINT satellite..
  • SURCAL 1A - . Mass: 37 kg (81 lb). Nation: USA. Agency: USAF; USN. Class: Military. Type: Radar calibration target. Spacecraft: SURCAL. Decay Date: 1966-01-18 . USAF Sat Cat: 508 . COSPAR: 1962-B-Tau-4. Apogee: 2,160 km (1,340 mi). Perigee: 227 km (141 mi). Inclination: 70.3000 deg. Period: 109.30 min. Summary: Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .

1963 January 7 - . 21:09 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena D. LV Configuration: Thor Agena D 369 / Agena D 1157.
  • KH-4 9051 - . Payload: KH-4 s/n 9051 / Agena D 1157. Mass: 1,150 kg (2,530 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4. Decay Date: 1963-01-24 . USAF Sat Cat: 525 . COSPAR: 1963-002A. Apogee: 384 km (238 mi). Perigee: 202 km (125 mi). Inclination: 82.0000 deg. Period: 90.30 min. Summary: KH-4. Erratic vehicle attitude. Frame ephemeris not created..

1963 April 26 - . 20:13 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena D. LV Configuration: Thor Agena D 372 / Agena D 1411. FAILURE: Attitude sensors were misaligned. No orbit.. Failed Stage: G.
  • KH-5 9055A - . Payload: KH-5 s/n 9055A. Mass: 1,500 kg (3,300 lb). Nation: USA. Agency: USAF. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-5. Decay Date: 1963-04-26 . COSPAR: F630426AA. Summary: Mission failed..

1963 June 15 - . 14:29 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena D. LV Configuration: Thor Agena D 378 / Agena D 2353.
  • Lofti 2A - . Mass: 26 kg (57 lb). Nation: USA. Agency: USN. Class: Technology. Type: Communications technology satellite. Spacecraft: Lofti. Decay Date: 1963-07-18 . USAF Sat Cat: 601 . COSPAR: 1963-021B. Apogee: 876 km (544 mi). Perigee: 170 km (100 mi). Inclination: 69.9000 deg. Period: 95.10 min. Summary: VLF experiments. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .
  • Solrad 6A - . Mass: 39 kg (85 lb). Nation: USA. Agency: USN. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: GRAB. Decay Date: 1963-08-01 . USAF Sat Cat: 599 . COSPAR: 1963-021C. Apogee: 869 km (539 mi). Perigee: 170 km (100 mi). Inclination: 69.9000 deg. Period: 95.10 min. Summary: Solar radiation data. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .
  • RADOSE 112 - . Payload: NRL PL 112. Mass: 25 kg (55 lb). Nation: USA. Agency: USN. Class: Earth. Type: Magnetosphere satellite. Spacecraft: RADOSE. Decay Date: 1963-07-30 . USAF Sat Cat: 600 . COSPAR: 1963-021D. Apogee: 875 km (543 mi). Perigee: 170 km (100 mi). Inclination: 69.9000 deg. Period: 95.10 min. Summary: Radiation dosimeter measurements. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .
  • USN satellite - . Payload: NRL PL130?. Mass: 35 kg (77 lb). Nation: USA. Agency: USN. Program: ELINT. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: NRL ELINT. Decay Date: 1963-07-27 . USAF Sat Cat: 598 . COSPAR: 1963-021E. Apogee: 859 km (533 mi). Perigee: 170 km (100 mi). Inclination: 69.9000 deg. Period: 94.90 min. Summary: Identified by McDowell as probable NRL ELINT satellite..
  • SURCAL 1B - . Mass: 3.00 kg (6.60 lb). Nation: USA. Agency: USN. Class: Military. Type: Radar calibration target. Spacecraft: SURCAL. Decay Date: 1963-07-05 . USAF Sat Cat: 597 . COSPAR: 1963-021F. Apogee: 802 km (498 mi). Perigee: 172 km (106 mi). Inclination: 69.9000 deg. Period: 94.40 min. Summary: Surveillance Calibration. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .

1963 July 19 - . 00:00 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena D. LV Configuration: Thor Agena D 388 / Agena D 1412.
  • KH-4 9057 - . Payload: KH-4 s/n 9057 / Agena D 1412. Mass: 1,150 kg (2,530 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4. Decay Date: 1963-08-13 . USAF Sat Cat: 621 . COSPAR: 1963-029A. Apogee: 382 km (237 mi). Perigee: 197 km (122 mi). Inclination: 82.9000 deg. Period: 90.40 min. Summary: KH-4. Best mission to date..

1963 September 28 - . 20:22 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Able-Star. LV Configuration: Thor Ablestar-2 375 AB013.
  • Transit 5BN-1 - . Mass: 70 kg (154 lb). Nation: USA. Agency: USN. Program: Transit. Class: Navigation. Type: Navigation satellite. Spacecraft: Transit. USAF Sat Cat: 670 . COSPAR: 1963-038B. Apogee: 1,125 km (699 mi). Perigee: 1,066 km (662 mi). Inclination: 90.1000 deg. Period: 107.20 min. First test of nuclear-powered Transit operational prototype. Carried SNAP-9A nuclear power source. The satellite achieved gravity-gradient stabilization, but upside down, making the signal level too low for operational users with low-gain antennas. However, geodetic and navigational evaluation data were obtained.
  • Transit 5E-1 - . Payload: APL SN 39. Mass: 61 kg (134 lb). Nation: USA. Agency: USN. Program: Transit. Class: Earth. Type: Magnetosphere satellite. Spacecraft: Transit. USAF Sat Cat: 671 . COSPAR: 1963-038C. Apogee: 1,123 km (697 mi). Perigee: 1,065 km (661 mi). Inclination: 90.1000 deg. Period: 107.10 min. The missions of Satellite 1963-038C were to measure omnidirectional flux of protons and electrons at various energy levels, radiation effects on transistors, and the effectiveness of thermal coatings. The satellite was launched together with a classified Department of Defense spacecraft on September 28, 1963. Its planned orbit was apogee 1120 kilometres, perigee 1070 kilometres, inclination 88.9 degrees. The satellite weighed 62 kg; its body was in the shape of an 0.46 m x 0.25 m octagonal prism. It was powered by four solar blades and transmited on 136, 162, and 324 mcs. The spacecraft was built for the Bureau of Naval Weapons. In 1967 it was still sending usable data from all systems.

1963 December 5 - . 21:51 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Able-Star. LV Configuration: Thor Ablestar-2 385 AB015.
  • Transit 5BN-2 - . Mass: 75 kg (165 lb). Nation: USA. Agency: USN. Program: Transit. Class: Navigation. Type: Navigation satellite. Spacecraft: Transit. USAF Sat Cat: 704 . COSPAR: 1963-049B. Apogee: 1,110 km (680 mi). Perigee: 1,061 km (659 mi). Inclination: 90.1000 deg. Period: 107.00 min. Transit operational prototype powered by a SNAP-9A nuclear power source. First operational navigation satellite. It was used regularly by both surface and submarine units of the Navy until November 1964. From this point in time the US Navy had continuous use of satellite navigation.
  • Transit 5E-3 - . Mass: 53 kg (116 lb). Nation: USA. Agency: USN. Program: Transit. Class: Earth. Type: Magnetosphere satellite. Spacecraft: Transit. USAF Sat Cat: 705 . COSPAR: 1963-049C. Apogee: 1,108 km (688 mi). Perigee: 1,060 km (650 mi). Inclination: 90.1000 deg. Period: 106.90 min. Summary: Radiation monitoring..

1964 January 25 - . 13:59 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena B SLV-2. LV Configuration: Thor SLV-2 Agena B 397 (TA2) / Agena B 6301.
  • Echo 2 - . Payload: Echo C A-12. Mass: 256 kg (564 lb). Nation: USA. Agency: NASA Langley. Class: Technology. Type: Communications technology satellite. Spacecraft: Echo 2. Decay Date: 1969-06-07 . USAF Sat Cat: 740 . COSPAR: 1964-004A. Apogee: 1,315 km (817 mi). Perigee: 1,030 km (640 mi). Inclination: 81.5000 deg. Period: 108.80 min. Summary: Passive commsat; balloon; 1st joint US/USSR space mission. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C). .

1964 April 21 - . 18:50 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Able-Star. LV Configuration: Thor Ablestar-2 379 AB014. FAILURE: Failure. Failed Stage: U.
  • Transit 5BN-3 - . Mass: 75 kg (165 lb). Nation: USA. Agency: USN. Program: Transit. Class: Navigation. Type: Navigation satellite. Spacecraft: Transit. Decay Date: 1964-04-21 . COSPAR: F640421A. Summary: Carried SNAP-9A nuclear power source. After this launch failure it was decided that operational Transits would be solar-powered only..
  • Transit 5E-4 - . Nation: USA. Agency: USN. Program: Transit. Class: Earth. Type: Magnetosphere satellite. Spacecraft: Transit. COSPAR: F640421B. Summary: Radiation monitoring..

1964 June 19 - . 23:18 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena D SLV-2A/D. LV Configuration: Thor SLV-2A Agena D 410 / Agena D 1609.
  • KH-4A 1007 - . Payload: KH-4A s/n 1007 / Agena D 1609 / OPS 3754. Mass: 1,500 kg (3,300 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4A. Decay Date: 1964-07-16 . USAF Sat Cat: 814 . COSPAR: 1964-032A. Apogee: 451 km (280 mi). Perigee: 180 km (110 mi). Inclination: 85.0000 deg. Period: 90.90 min. Summary: KH-4A. Out-of-focus area on some film..

1964 August 28 - . 07:56 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena B SLV-2. LV Configuration: Thor SLV-2 Agena B 399 (TA3) / Agena B 6201. FAILURE: Agena-B cut off too early. Partial Failure.. Failed Stage: 2.
  • Nimbus 1 - . Payload: Nimbus A. Mass: 376 kg (828 lb). Nation: USA. Agency: NASA Greenbelt. Class: Earth. Type: Weather satellite. Spacecraft: Nimbus. Decay Date: 1974-05-16 . USAF Sat Cat: 872 . COSPAR: 1964-052A. Apogee: 937 km (582 mi). Perigee: 429 km (266 mi). Inclination: 98.7000 deg. Period: 98.40 min. Returned 27,000 cloud cover images. The spacecraft carried an advanced vidicon camera system for recording and storing remote cloudcover pictures, an automatic picture transmission camera for providing real-time cloud cover pictures, and a high-resolution infrared radiometer to complement the daytime TV coverage and to measure nighttime radiative temperatures of cloud tops and surface terrain. A short second-stage burn resulted in an unplanned eccentric orbit. Otherwise, the spacecraft and its experiments operated successfully until September 22, 1964. The solar paddles became locked in position, resulting in inadequate electrical power to continue operations.

1964 November 18 - . 20:35 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena D SLV-2A/D. LV Configuration: Thor SLV-2A Agena D 416 / Agena D SS-01A 1180.
  • KH-4A 1014 (ORBIS) - . Payload: KH-4A s/n 1014 & Orbis / Agena D 1180 / OPS 3360. Mass: 1,500 kg (3,300 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4A. Decay Date: 1964-12-06 . USAF Sat Cat: 930 . COSPAR: 1964-075A. Apogee: 329 km (204 mi). Perigee: 177 km (109 mi). Inclination: 70.0000 deg. Period: 89.60 min. Summary: KH-4A. Cameras operated successfully..
  • ORBIS - . Nation: USA. Agency: USAF. Spacecraft: KH-4A. Decay Date: 1964-12-06 . USAF Sat Cat: 930 . COSPAR: 1964-075xx. Apogee: 276 km (171 mi). Perigee: 167 km (103 mi). Inclination: 70.0000 deg. Period: 88.90 min.

1964 December 21 - . 19:08 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena D SLV-2A/D. LV Configuration: Thor SLV-2A Agena D 425 / Agena D SS-01A 2355.
  • OPS 3762/Agena D 2355 - . Nation: USA. Agency: NRO; USAF. Program: ELINT. Spacecraft: Ferret. Decay Date: 1965-01-11 . USAF Sat Cat: 964 . COSPAR: 1964-087A. Apogee: 264 km (164 mi). Perigee: 238 km (147 mi). Inclination: 70.1000 deg. Period: 89.50 min. Summary: Unknown mission. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A)..

1965 March 11 - . 13:39 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Able-Star. LV Configuration: Thor Ablestar-2 440 AB018.
  • Transit-O-3 - . Mass: 60 kg (132 lb). Nation: USA. Agency: USN. Program: Transit. Class: Navigation. Type: Navigation satellite. Spacecraft: Transit. Decay Date: 1965-06-14 . USAF Sat Cat: 1303 . COSPAR: 1965-017A. Apogee: 418 km (259 mi). Perigee: 191 km (118 mi). Inclination: 90.0000 deg. Period: 90.70 min. Summary: Naval Avionics Facility-assembled production spacecraft. Failed after a few weeks operation..
  • SECOR 2 - . Payload: EGRS 2. Mass: 18 kg (39 lb). Nation: USA. Agency: USA ACE. Class: Earth. Type: Geodetic satellite. Spacecraft: SECOR. Decay Date: 1968-02-26 . USAF Sat Cat: 1250 . COSPAR: 1965-017B. Apogee: 1,014 km (630 mi). Perigee: 296 km (183 mi). Inclination: 90.0000 deg. Period: 97.90 min. Summary: Failed. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .

1965 June 24 - . 22:35 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Able-Star. LV Configuration: Thor Ablestar-2 447 AB019.
  • Transit O-4 - . Payload: NNS 30040 / OPS 8480. Mass: 61 kg (134 lb). Nation: USA. Agency: USN. Program: Transit. Class: Navigation. Type: Navigation satellite. Spacecraft: Transit. USAF Sat Cat: 1420 . COSPAR: 1965-048A. Apogee: 1,125 km (699 mi). Perigee: 1,016 km (631 mi). Inclination: 90.1000 deg. Period: 106.60 min. Summary: Spacecraft built by Naval Avionics Facility, but refurbished by APL. Operated for 7 to 11 months, but then failed due to poor workmanship of NAFI components..

1965 August 13 - . 22:11 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Able-Star. LV Configuration: Thor Ablestar-2 455 AB020.
  • Dodecapole 2 - . Payload: PORCUPINE 2. Mass: 4.00 kg (8.80 lb). Nation: USA. Agency: USN. Class: Military. Type: Radar calibration target. Spacecraft: DODECAPOLE. USAF Sat Cat: 1510 . COSPAR: 1965-065C. Apogee: 1,051 km (653 mi). Perigee: 979 km (608 mi). Inclination: 90.0000 deg. Period: 105.40 min. Summary: Surveillance Calibration; dodecahedron; extended 12 25 ft. antennas. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .
  • Calsphere 4A - . Payload: NRL PL 158?. Mass: 2.00 kg (4.40 lb). Nation: USA. Agency: USN. Class: Military. Type: Radar calibration target. Spacecraft: Calsphere. USAF Sat Cat: 1520 . COSPAR: 1965-065H. Apogee: 1,179 km (732 mi). Perigee: 1,077 km (669 mi). Inclination: 90.1000 deg. Period: 107.90 min. Summary: Surveillance Calibration; white 14 inch dia. sphere. .
  • SURCAL 5 - . Payload: NRL PL150C?. Nation: USA. Agency: USN. Class: Military. Type: Radar calibration target. Spacecraft: SURCAL. USAF Sat Cat: 1521 . COSPAR: 1965-065K. Apogee: 1,196 km (743 mi). Perigee: 1,083 km (672 mi). Inclination: 90.0000 deg. Period: 108.11 min.
  • Transit O-5 - . Payload: NNS 30050 / OPS 8464. Mass: 61 kg (134 lb). Nation: USA. Agency: USN. Program: Transit. Class: Navigation. Type: Navigation satellite. Spacecraft: Transit. USAF Sat Cat: 1514 . COSPAR: 1965-065F. Apogee: 1,183 km (735 mi). Perigee: 1,078 km (669 mi). Inclination: 89.9000 deg. Period: 107.90 min. Summary: Naval Avionics Facility-assembled production spacecraft. Failed after a few weeks operation..
  • Tempsat 1 - . Mass: 9.00 kg (19.80 lb). Nation: USA. Agency: USN. Class: Military. Type: Radar calibration target. Spacecraft: Tempsat. USAF Sat Cat: 1512 . COSPAR: 1965-065E. Apogee: 1,188 km (738 mi). Perigee: 1,082 km (672 mi). Inclination: 89.9000 deg. Period: 108.00 min. Summary: Surveillance Calibration; black 14 inch dia. sphere. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .
  • Long Rod - . Payload: Navspasur Rod. Nation: USA. Agency: USN. Class: Military. Type: Radar calibration target. Spacecraft: Surcal. USAF Sat Cat: 1515 . COSPAR: 1965-065G. Apogee: 1,194 km (741 mi). Perigee: 1,090 km (670 mi). Inclination: 90.0000 deg. Period: 108.10 min. Summary: Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .

1965 October 14 - . 13:11 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena D SLV-2A/D. LV Configuration: Thor SLV-2A Agena D 435 (TA4) / Agena D SS-01B 680.
  • OGO 2 - . Payload: OGO C (S-50). Mass: 507 kg (1,117 lb). Nation: USA. Agency: NASA Greenbelt. Class: Earth. Type: Magnetosphere satellite. Spacecraft: OGO. Decay Date: 1981-09-17 . USAF Sat Cat: 1620 . COSPAR: 1965-081A. Apogee: 1,515 km (941 mi). Perigee: 419 km (260 mi). Inclination: 87.4000 deg. Period: 104.40 min. OGO 2 was a large observatory instrumented with 20 experiments designed to make simultaneous, correlative observations of aurora and airglow emissions, energetic particles, magnetic field variations, ionospheric properties, etc., especially over the polar areas. Soon after achieving orbit, difficulties in maintaining earth lock with horizon scanners caused exhaustion of attitude control gas by October 23, 1965, 10 days after launch. At this time, the spacecraft entered a spin mode (about 0.11 rpm) with a large coning angle about the previously vertical axis. Five experiments became useless when the satellite went into this spin mode. Six additional experiments were degraded by this loss of attitude control. By April 1966, both batteries had failed, so subsequent observations were limited to sunlit portions of the orbit. By December 1966, only eight experiments were operational, five of which were not degraded by the spin mode operation. By April 1967, the tape recorders had malfunctioned and only one third of the recorded data could be processed. Spacecraft power and periods of operational scheduling conflicts created six large data gaps so that data were observed on a total of about 306 days of the 2-yr, 18-day total span of observed satellite data to November 1, 1967. The spacecraft was shut down on November 1, 1967, with eight experiments still operational. It was reactivated for 2 weeks in February 1968 to operate the rubidium vapor magnetometer experiment.

1965 November 29 - . 04:48 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena B SLV-2. LV Configuration: Thor SLV-2 Agena B 453 (TA5) / Agena B S-01 6102 .
  • Alouette 2 - . Payload: Alouette 2 / Explorer 31. Mass: 145 kg (319 lb). Nation: Canada. Agency: DRTE. Class: Earth. Type: Magnetosphere satellite. Spacecraft: Alouette. USAF Sat Cat: 1804 . COSPAR: 1965-098A. Apogee: 2,666 km (1,656 mi). Perigee: 503 km (312 mi). Inclination: 79.8000 deg. Period: 117.90 min. Ionospheric research; data correlated with Explorer 31. The double-launch project, known as ISIS-X was the first in a new co-operative NASA-Canadian Defense Research Board program for International Satellites for Ionospheric Studies. Alouette was in orbit with an apogee just over a kilometre lower than Explorer 31's and with a perigee of just more than a kilometre higher. The orbits were some 3000 km at apogee and 500 km at perigee.
  • Explorer 31 - . Payload: DME A. Mass: 99 kg (218 lb). Nation: USA. Agency: NASA Greenbelt. Program: Explorer. Class: Earth. Type: Ionosphere satellite. Spacecraft: DME. USAF Sat Cat: 1806 . COSPAR: 1965-098B. Apogee: 2,833 km (1,760 mi). Perigee: 505 km (313 mi). Inclination: 79.8000 deg. Period: 119.70 min. Ionospheric research; data correlated with Alouette 2. The Explorer 31, Direct Measurement Explorer, was launched with a Canadian Alouette II on November 28, 1965, on a Thor-Agena rocket from Vandenberg Air Force Base, California. The double-launch project, known as ISIS-X was the first in a new co-operative NASA-Canadian Defense Research Board program for International Satellites for Ionospheric Studies. Explorer 31 was in orbit with an apogee just over a kilometre more than Alouette's and with a perigee of just more than a kilometre lower. The orbits were some 3000 km at apogee and 500 km at perigee. Eight ionospheric measurement experiments sampled the environment both forward and after the satellite's path.

1966 May 15 - . 07:55 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena B SLV-2A/B. LV Configuration: Thor SLV-2A Agena B 456 (TA6) / Agena B S-01 6202 .
  • Nimbus 2 - . Payload: Nimbus C. Mass: 414 kg (912 lb). Nation: USA. Agency: NASA Greenbelt. Class: Earth. Type: Weather satellite. Spacecraft: Nimbus. USAF Sat Cat: 2173 . COSPAR: 1966-040A. Apogee: 1,176 km (730 mi). Perigee: 1,093 km (679 mi). Inclination: 100.3000 deg. Period: 108.00 min. TV, IR cloud cover photos. The spacecraft carried an advanced vidicon camera system for recording and storing remote cloud cover pictures, an automatic picture transmission camera for providing real-time cloudcover pictures, and both high- and medium-resolution infrared radiometers (HRIR and MRIR) for measuring the intensity and distribution of electromagnetic radiation emitted by and reflected from the earth and its atmosphere. The spacecraft and experiments performed normally after launch until July 26, 1966, when the spacecraft tape recorder failed. Its function was taken over by the HRIR tape recorder until November 15, 1966, when it also failed. Some real-time data were collected until January 17, 1969, when the spacecraft mission was terminated owing to deterioration of the horizon scanner used for earth reference.

1966 June 24 - . 00:12 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena D SLV-2A/D. LV Configuration: Thor SLV-2A Agena D 473 (TA7) / Agena D SS-01B 631.
  • Pageos 1 - . Payload: Pageos A. Mass: 55 kg (121 lb). Nation: USA. Agency: NASA Langley. Class: Earth. Type: Geodetic satellite. Spacecraft: Pageos. Decay Date: 1975-07-12 . USAF Sat Cat: 2253 . COSPAR: 1966-056A. Apogee: 4,220 km (2,620 mi). Perigee: 3,913 km (2,431 mi). Inclination: 85.4000 deg. Period: 177.10 min. The PAGEOS (Passive Geodetic Earth Orbiting Satellite) spacecraft was a 30.48-m inflatable sphere, and had no instrumentation on board. It was the second (following GEOS 1) NASA satellite in the National Geodetic Satellites Program. The launch, orbit, separation, inflation and initial operation were nominal, with more than 40 ground stations participating in the observation program. The orbit was generally considered too high for drag-density study, although some work was done in this area by the Smithsonian Astrophysical Observatory. Additional Details: here....
  • Pageos canister half - . Payload: Pageos canister half. Nation: USA. Agency: NASA Langley. Spacecraft: Pageos. USAF Sat Cat: 2511 . COSPAR: 1966-056D. Apogee: 4,255 km (2,643 mi). Perigee: 4,227 km (2,626 mi). Inclination: 87.0000 deg. Period: 181.50 min.
  • Pageos canister half - . Payload: Pageos canister half. Nation: USA. Agency: NASA Langley. Spacecraft: Pageos. USAF Sat Cat: 2256 . COSPAR: 1966-056C. Apogee: 4,276 km (2,656 mi). Perigee: 4,196 km (2,607 mi). Inclination: 86.9000 deg. Period: 181.40 min.

1966 October 2 - . 10:39 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Delta E. LV Configuration: Thor Delta E 463/D41.
  • ESSA 3 - . Payload: TOS A. Mass: 145 kg (319 lb). Nation: USA. Agency: ESSA. Program: Tiros. Class: Earth. Type: Weather satellite. Spacecraft: TOS. USAF Sat Cat: 2435 . COSPAR: 1966-087A. Apogee: 1,486 km (923 mi). Perigee: 1,387 km (861 mi). Inclination: 100.9000 deg. Period: 114.60 min. Summary: Environmental Survey Satellite 3; replace ESSA 1. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C)..

1967 January 26 - . 17:31 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Delta E. LV Configuration: Thor Delta E 472/D45.
  • ESSA 4 - . Payload: TOS B. Mass: 132 kg (291 lb). Nation: USA. Agency: ESSA. Program: Tiros. Class: Earth. Type: Weather satellite. Spacecraft: TOS. USAF Sat Cat: 2657 . COSPAR: 1967-006A. Apogee: 1,440 km (890 mi). Perigee: 1,326 km (823 mi). Inclination: 102.0000 deg. Period: 113.40 min. Summary: Replaced ESSA 2. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C)..

1967 April 20 - . 11:21 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Delta E. LV Configuration: Thor Delta E 484/D48.
  • ESSA 5 - . Payload: TOS C. Mass: 145 kg (319 lb). Nation: USA. Agency: ESSA. Program: Tiros. Class: Earth. Type: Weather satellite. Spacecraft: TOS. USAF Sat Cat: 2757 . COSPAR: 1967-036A. Apogee: 1,422 km (883 mi). Perigee: 1,355 km (841 mi). Inclination: 102.0000 deg. Period: 113.50 min. Summary: Replaced ESSA 3. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C)..

1967 May 24 - . 14:05 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Delta E1. LV Configuration: Thor Delta E1 486/D49.
  • Explorer 34 - . Payload: IMP F. Mass: 75 kg (165 lb). Nation: USA. Agency: NASA Greenbelt. Program: Explorer. Class: Earth. Type: Magnetosphere satellite. Spacecraft: IMP. Decay Date: 1969-05-03 . USAF Sat Cat: 2817 . COSPAR: 1967-051A. Apogee: 214,379 km (133,208 mi). Perigee: 242 km (150 mi). Inclination: 67.1000 deg. Period: 6,358.20 min. Summary: Radiation, magnetic field data. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B). .

1967 July 28 - . 14:21 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena D SLV-2A/D. LV Configuration: Thor SLV-2A Agena D 478 (TA8) / Agena D SS-01B 680.
  • OGO 4 - . Payload: OGO D (NASA S-50A). Mass: 634 kg (1,397 lb). Nation: USA. Agency: NASA Greenbelt. Class: Earth. Type: Magnetosphere satellite. Spacecraft: OGO. Decay Date: 1972-08-16 . USAF Sat Cat: 2895 . COSPAR: 1967-073A. Apogee: 885 km (549 mi). Perigee: 422 km (262 mi). Inclination: 86.0000 deg. Period: 97.80 min. OGO 4 was a large observatory instrumented with experiments designed to study the interrelationships between the aurora and airglow emissions, energetic particle activity, geomagnetic field variation, ionospheric ionization and recombination, and atmospheric heating which take place during a period of increased solar activity. After the spacecraft achieved orbit and the experiments were deployed into an operating mode, an attitude control problem occurred. This condition was corrected by ground control procedures until complete failure of the tape recording systems in mid-January 1969. At that time, due to the difficulty of maintaining attitude control without the tape recorders, the attitude control system was commanded off, and the spacecraft was placed into a spin-stabilized mode about the axis which was previously maintained vertically. In this mode, seven of the remaining experiments were turned off since no meaningful data could be observed by them. On October 23, 1969, the satellite was turned off. It was reactivated again in January 1970 for 2 months to obtain VLF observations.

1967 November 10 - . 17:53 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Delta E1. LV Configuration: Thor Delta E1 480/D54.
  • ESSA 6 - . Payload: TOS D. Mass: 132 kg (291 lb). Nation: USA. Agency: ESSA. Program: Tiros. Class: Earth. Type: Weather satellite. Spacecraft: TOS. USAF Sat Cat: 3035 . COSPAR: 1967-114A. Apogee: 1,485 km (922 mi). Perigee: 1,409 km (875 mi). Inclination: 102.1000 deg. Period: 114.80 min. Summary: Returned cloud cover images. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C)..

1968 January 11 - . 16:16 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Delta E1. LV Configuration: Thor Delta E1 454/D56.
  • Explorer 36 - . Payload: GEOS B. Mass: 209 kg (460 lb). Nation: USA. Agency: NASA Greenbelt. Program: Explorer. Class: Astronomy. Type: Solar astronomy satellite. Spacecraft: GEOS. USAF Sat Cat: 3093 . COSPAR: 1968-002A. Apogee: 1,574 km (978 mi). Perigee: 1,081 km (671 mi). Inclination: 105.8000 deg. Period: 112.20 min. The geodetic instrumentation systems included (1) four optical beacons, (2) two C-band radar transponders, (3) a passive radar reflector, (4) a sequential collation of range radio range transponder, (5) a Goddard range and range rate transponder, (6) laser reflectors, and (7) Doppler beacons. Non-geodetic systems included a laser detector and a Minitrack interferometer beacon. The objectives of the spacecraft were to optimise optical station visibility periods and to provide complementary data for inclination-dependent terms established by the Explorer 29 (GEOS 1) gravimetric studies. The spacecraft was placed into a retrograde orbit to accomplish these objectives. Operational problems occurred in the main power system, optical beacon flash system, and the spacecraft clock, and adjustments in scheduling resulted in nominal operations.

1968 May 18 - . 08:23 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 520 (TA9) / Agena D 6221. FAILURE: Failure. Failed Stage: U.
  • Nimbus B - . Mass: 570 kg (1,250 lb). Nation: USA. Agency: NASA. Class: Earth. Type: Weather satellite. Spacecraft: Nimbus. Decay Date: 1968-05-18 . COSPAR: F680518A. Summary: Launched with Secor 10..
  • EGRS 10 - . Payload: Secor 10. Nation: USA. Agency: USAF. Spacecraft: Secor. COSPAR: F680518B.

1968 July 4 - . 17:26 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Delta J. LV Configuration: Thor Delta J 476/D57.
  • Explorer 38 - . Payload: RAE A. Mass: 190 kg (410 lb). Nation: USA. Agency: NASA Greenbelt. Program: Explorer. Class: Astronomy. Type: X-ray astronomy satellite. Spacecraft: RAE. USAF Sat Cat: 3307 . COSPAR: 1968-055A. Apogee: 5,861 km (3,641 mi). Perigee: 5,835 km (3,625 mi). Inclination: 120.9000 deg. Period: 224.30 min. Summary: Radio Astronomy Explorer; Earth, solar, cosmic radio emission data. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B). .

1968 August 16 - . 11:24 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Delta N. LV Configuration: Thor Delta N 528/D58.
  • ESSA 7 - . Payload: TOS E. Mass: 145 kg (319 lb). Nation: USA. Agency: ESSA. Program: Tiros. Class: Earth. Type: Weather satellite. Spacecraft: TOS. USAF Sat Cat: 3345 . COSPAR: 1968-069A. Apogee: 1,473 km (915 mi). Perigee: 1,431 km (889 mi). Inclination: 101.9000 deg. Period: 114.90 min. Summary: Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C)..

1968 December 15 - . 17:21 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Delta N. LV Configuration: Thor Delta N 532/D62.
  • ESSA 8 - . Payload: TOS F. Mass: 132 kg (291 lb). Nation: USA. Agency: ESSA. Program: Tiros. Class: Earth. Type: Weather satellite. Spacecraft: TOS. USAF Sat Cat: 3615 . COSPAR: 1968-114A. Apogee: 1,464 km (909 mi). Perigee: 1,414 km (878 mi). Inclination: 102.0000 deg. Period: 114.60 min. Summary: Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C)..

1969 January 30 - . 06:46 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Delta E1. LV Configuration: Thor Delta E1 485/D65.
  • Isis 1 - . Payload: Isis A. Mass: 241 kg (531 lb). Nation: Canada. Agency: CRCSS. Class: Earth. Type: Magnetosphere satellite. Spacecraft: Isis. USAF Sat Cat: 3669 . COSPAR: 1969-009A. Apogee: 3,458 km (2,148 mi). Perigee: 578 km (359 mi). Inclination: 88.4000 deg. Period: 127.60 min. Summary: Ionospheric measurements; data correlated with measurements from Alouette 1. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B). .

1969 April 14 - . 07:54 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 543 (TA10) / Agena D 6222.
  • Nimbus 3 - . Payload: Nimbus B2. Mass: 575 kg (1,267 lb). Nation: USA. Agency: NASA Greenbelt. Class: Earth. Type: Weather satellite. Spacecraft: Nimbus. USAF Sat Cat: 3890 . COSPAR: 1969-037A. Apogee: 1,130 km (700 mi). Perigee: 1,071 km (665 mi). Inclination: 100.4000 deg. Period: 107.30 min. Primary experiments consisted of a satellite infrared spectrometer (SIRS) for determining the vertical temperature profiles of the atmosphere, an infrared interferometer spectrometer (IRIS) for measuring the emission spectra of the earth-atmosphere system, both high- and medium-resolution infrared radiometers (HRIR and MRIR) for yielding information on the distribution and intensity of infrared radiation emitted and reflected by the earth and its atmosphere, monitor of ultraviolet solar energy (MUSE) for detecting solar UV radiation, image dissector camera system for providing daytime cloudcover pictures in both real-time mode using the real time transmission system and tape recorder mode using the high data rate storage system, radioisotope thermoelectric generator (RTG) SNAP-19 to assess the operational capability of radioisotope power for space applications, and an interrogation, recording and location system (IRLS) experiment designed to locate, interrogate, record, and retransmit meteorological and geophysical data from remote collection stations. Nimbus-3 was successful and performed normally until July 22, 1969, when the IRIS experiment failed. The HRIR and the SIRS experiments were terminated on January 25, 1970, and June 21, 1970, respectively. The remaining experiments continued operation until September 25, 1970, when the rear horizon scanner failed. Without this horizon scanner, it was impossible to maintain proper spacecraft attitude, thus making most experimental observations useless. All spacecraft operations were terminated on January 22, 1972.
  • SECOR 13 - . Payload: EGRS 13. Mass: 20 kg (44 lb). Nation: USA. Agency: USA ACE. Class: Earth. Type: Geodetic satellite. Spacecraft: SECOR. USAF Sat Cat: 3891 . COSPAR: 1969-037B. Apogee: 1,129 km (701 mi). Perigee: 1,070 km (660 mi). Inclination: 100.3000 deg. Period: 107.30 min. Summary: Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C). .

1969 June 5 - . 14:42 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2H. LV Configuration: Thorad SLV-2H Agena D 526 (TA11) / Agena D 6803.
  • OGO 6 - . Payload: OGO F. Mass: 634 kg (1,397 lb). Nation: USA. Agency: NASA Greenbelt. Class: Earth. Type: Magnetosphere satellite. Spacecraft: OGO. Decay Date: 1979-10-12 . USAF Sat Cat: 3986 . COSPAR: 1969-051A. Apogee: 1,089 km (676 mi). Perigee: 397 km (246 mi). Inclination: 82.0000 deg. Period: 99.70 min. OGO 6 was a large observatory instrumented with 26 experiments designed to study the various interrelationships between, and latitudinal distributions of, high-altitude atmospheric parameters during a period of increased solar activity. On June 22, 1969, the spacecraft potential dropped significantly during sunlight operation and remained so during subsequent sunlight operation. This unexplained shift affected seven experiments which made measurements dependent upon knowledge of the spacecraft plasma sheath. During October 1969, a string of solar cells failed, but the only effect of the decreased power was to cause two experiments to change their mode of operation. Also during October 1969, a combination of manual and automatic attitude control was initiated, which extended the control gas lifetime of the attitude control system. In August 1970, tape recorder (TR) no. 1 operation degraded, so all recorded data were subsequently taken with TR no. 2. By September 1970, power and equipment degradation left 14 experiments operating normally, 3 partially, and 9 off. From October 14, 1970, TR no. 2 was used only on Wednesdays (world days) to conserve power and extend TR operation. In June 1971, the number of 'on' experiments decreased from 13 to 7, and on June 28, 1971, the spacecraft was placed in a spin-stabilized mode about the yaw (Z) axis and turned off due to difficulties with spacecraft power. OGO 6 was turned on again from October 10, 1971, through March 1972, for operation of experiment 25 by The Radio Research Laboratory, Japan.

1970 February 4 - . 02:59 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 534 (TA12) / Agena D.
  • SERT 2 - . Mass: 1,404 kg (3,095 lb). Nation: USA. Agency: NASA Cleveland. Class: Technology. Type: Ion engine technology satellite. Spacecraft: SERT. USAF Sat Cat: 4327 . COSPAR: 1970-009A. Apogee: 1,046 km (649 mi). Perigee: 1,039 km (645 mi). Inclination: 99.2000 deg. Period: 106.00 min. Space Electric Rocket Test; the ion engines aboard were operated until 1981. The SERT 2 development program started in 1966 and included thruster ground tests of 6742 hours and 5169 hours duration. A prototype version of the SERT 2 spacecraft was ground-tested for a period of 2400 hours with an operating ion engine. In addition to diagnostic equipment and related ion engine hardware, the spacecraft had two identical 15 cm diameter, mercury ion engines. Flight objectives included in-space operation for a period of 6 months, measurement of thrust, and demonstration of electromagnetic compatibility. The thruster maximum power level was 0.85 kW, and this provided operation at a 28 mN thrust level at 4200 s specific impulse. Flight data were obtained from 1970 to 1981 with an ion engine operating intermittently in one of three different modes, namely, HV ion extraction, discharge chamber operation only, or just neutralizer operation. Major results were that two mercury engines thrusted for periods of 3781 hours and 2011 hours. Test duration was limited due to shorts in the ion optical system. Thrust measured in space and on the ground agreed within the measurement uncertainties. Up to 300 thruster restarts were demonstrated. One power-processing unit accumulated nearly 17,900 hours during the course of the mission. Additionally, the ion propulsion system was electromagnetically compatible with all other spacecraft systems.

1970 April 8 - . 08:17 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 553 (TA13) / Agena D 6223.
  • Nimbus 4 - . Payload: Nimbus D. Mass: 620 kg (1,360 lb). Nation: USA. Agency: NASA Greenbelt. Class: Earth. Type: Weather satellite. Spacecraft: Nimbus. USAF Sat Cat: 4362 . COSPAR: 1970-025A. Apogee: 1,099 km (682 mi). Perigee: 1,088 km (676 mi). Inclination: 100.1000 deg. Period: 107.10 min. Environmental research. Primary experiments consisted of an image dissector camera system for providing daytime cloudcover pictures both in real-time and recorded modes, temperature-humidity infrared radiometer (THIR) for measuring daytime and nighttime surface and cloudtop temperatures as well as the water vapor content of the upper atmosphere, infrared interferometer spectrometer (IRIS) for measuring the emission spectra of the earth/atmosphere system, satellite infrared spectrometer (SIRS) for determining the vertical profiles of temperature and water vapor in the atmosphere, a monitor of ultraviolet solar energy (MUSE) for detecting solar UV radiation, a backscatter ultraviolet (BUV) detector for monitoring the vertical distribution and total amount of atmospheric ozone on a global scale, a filter wedge spectrometer (FWS) for accurate measurement of IR radiance as a function of wavelength from the earth/atmosphere system, a selective chopper radiometer (SCR) for determining the temperatures of six successive 10-km layers in the atmosphere from absorption measurements in the 15-micrometer CO2 band, and an interrogation, recording, and location system (IRLS) for locating, interrogating, recording, and retransmitting meteorological and geophysical data from remote collection stations. The spacecraft performed well until April 14, 1971, when attitude problems started. The experiments then operated on a limited time basis until September 30, 1980.
  • TOPO 1 - . Payload: Topo A. Mass: 18 kg (39 lb). Nation: USA. Agency: USA TOPO. Class: Earth. Type: Geodetic satellite. Spacecraft: TOPO. USAF Sat Cat: 4363 . COSPAR: 1970-025B. Apogee: 1,087 km (675 mi). Perigee: 1,084 km (673 mi). Inclination: 100.0000 deg. Period: 107.00 min. Summary: Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C). .

1971 April 1 - . 02:57 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Delta E1. LV Configuration: Thor Delta E1 491/D84.
  • Isis 2 - . Payload: Isis B. Mass: 264 kg (582 lb). Nation: Canada. Agency: CRCSS. Class: Earth. Type: Magnetosphere satellite. Spacecraft: Isis. USAF Sat Cat: 5104 . COSPAR: 1971-024A. Apogee: 1,424 km (884 mi). Perigee: 1,358 km (843 mi). Inclination: 88.2000 deg. Period: 113.60 min. Summary: Ionospheric research. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B). .

1971 October 21 - . 11:32 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Delta N6. LV Configuration: Thor Delta N6 572/D86. FAILURE: Failure.. Failed Stage: 2.
  • ITOS B - . Payload: ITOS B. Mass: 308 kg (679 lb). Nation: USA. Agency: NASA Greenbelt. Program: Tiros. Class: Earth. Type: Weather satellite. Spacecraft: ITOS. Decay Date: 1972-07-21 . USAF Sat Cat: 5565 . COSPAR: 1971-091A. Apogee: 1,483 km (921 mi). Perigee: 293 km (182 mi). Inclination: 102.5000 deg. Period: 102.70 min. Summary: Unusable orbit..

1972 January 31 - . 17:20 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Delta L. LV Configuration: Thor Delta L 564/D87.
  • HEOS 2 - . Payload: HEOS A2. Mass: 123 kg (271 lb). Nation: Europe. Agency: ESRO. Class: Earth. Type: Magnetosphere satellite. Spacecraft: HEOS. Decay Date: 1974-08-02 . USAF Sat Cat: 5814 . COSPAR: 1972-005A. Apogee: 240,164 km (149,230 mi). Perigee: 405 km (251 mi). Inclination: 89.9000 deg. Period: 7,477.10 min. Summary: Highly Eccentric Orbiting Satellite; particles and fields data. Fifth satellite of ESRO. Also registered as US object 1972-05A in A/AC.105/INF.248 with orbit 7835.4 min, 439 x 248160 km x 90.2 deg, category B. .

1972 March 12 - . 01:55 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Delta N. LV Configuration: Thor Delta N 573/D88.
  • TD-1A; Thor Delta 1A - . Payload: TD 1A. Mass: 472 kg (1,040 lb). Nation: Europe. Agency: ESRO. Class: Technology. Type: Navigation technology satellite. Spacecraft: TD-1A. Decay Date: 1980-01-09 . USAF Sat Cat: 5879 . COSPAR: 1972-014A. Apogee: 550 km (340 mi). Perigee: 523 km (324 mi). Inclination: 97.6000 deg. Period: 95.40 min. Summary: Sixth satellite of ESRO. Also registered as US object 1972-14A in A/AC.105/INF.255 with orbit 95.3 min, 525 x 548 km x 97.5 deg, category B. .

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