Encyclopedia Astronautica
Thorad Agena D SLV-2G


Thor Agena upgraded with Extended Length Tank Thor stage. 3 stage vehicle.

Failures: 4. Success Rate: 93.33%. First Fail Date: 1963-02-28. Last Fail Date: 1966-05-03 in 1985 dollars. Flyaway Unit Cost $: 19.560 million. Failures: 2. Success Rate: 93.33%. First Fail Date: 1967-05-09. Last Fail Date: 1968-05-18. Failures: 1. First Fail Date: 1971-02-17. Last Fail Date: 1971-02-17 in 1985 dollars. Flyaway Unit Cost $: 22.170 million.

Stage Data - Thorad Agena D SLV-2G

  • Stage 0. 3 x Castor 1. Gross Mass: 3,852 kg (8,492 lb). Empty Mass: 535 kg (1,179 lb). Thrust (vac): 286.001 Kn (64,296 lbf). Isp: 247 sec. Burn time: 27 sec. Isp(sl): 232 sec. Diameter: 0.79 m (2.59 ft). Span: 0.79 m (2.59 ft). Length: 5.92 m (19.42 ft). Propellants: Solid. No Engines: 1. Engine: M33-20-4. Status: Out of Production.
  • Stage 1. 1 x Delta Thor LT. Gross Mass: 70,354 kg (155,104 lb). Empty Mass: 3,715 kg (8,190 lb). Thrust (vac): 866.710 Kn (194,844 lbf). Isp: 290 sec. Burn time: 215 sec. Isp(sl): 256 sec. Diameter: 2.44 m (8.00 ft). Span: 2.44 m (8.00 ft). Length: 21.43 m (70.30 ft). Propellants: Lox/Kerosene. No Engines: 1. Engine: MB-3-3. Other designations: Long Tank Thor. Status: Out of Production.
  • Stage 2. 1 x Agena D. Gross Mass: 6,821 kg (15,037 lb). Empty Mass: 673 kg (1,483 lb). Thrust (vac): 71.166 Kn (15,999 lbf). Isp: 300 sec. Burn time: 265 sec. Isp(sl): 0.0000 sec. Diameter: 1.52 m (4.98 ft). Span: 1.52 m (4.98 ft). Length: 7.09 m (23.26 ft). Propellants: Nitric acid/UDMH. No Engines: 1. Engine: Bell 8096. Status: Out of Production. One of the real workhorses of U. S. space exploration, Agena was an upper stage which was also employed as a spacecraft, the whole vehicle going into orbit. Agena played a key role in manned space flight; it was the target vehicle for rendezvous and docking manoeuvres in NASA's Gemini project. Agena had a main rocket engine capable of multiple re-starts in space; in the modified target vehicle version it also had 2 secondary engines to provide small changes in velocity and position in orbit. In the Gemini Agena, a control system could handle 96 commands from the astronauts or from ground stations. Agena was used as an upper stage with the Thor, augmented Thor, Atlas and Titan boosters; it had played important roles in such military and NASA programs as Discoverer, Samos, Mariner, OGO, Lunar Orbiter, Ranger and Orbiting Astronomical Observatory.

AKA: SLV-2G.
Status: Retired 1971.
Gross mass: 91,400 kg (201,500 lb).
Height: 32.90 m (107.90 ft).
Diameter: 2.44 m (8.00 ft).
Thrust: 1,444.00 kN (324,624 lbf).
Apogee: 1,000 km (600 mi).
First Launch: 1966.08.09.
Last Launch: 1971.12.14.
Number: 30 .

More... - Chronology...


Associated Countries
Associated Spacecraft
  • 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...
  • NRL ELINT American military naval signals reconnaisance satellite. 6 launches, 1962.12.13 (Black Sphere) to 1969.09.30 (Surcal). NRL ELINT satellite. More...
  • SSF American military naval signals reconnaisance satellite. 54 launches, 1963.03.18 (P-11 No. 1) to 1989.08.08 (USA 41). 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...
  • Nimbus American earth weather satellite. 8 launches, 1964.08.28 (Nimbus 1) to 1978.10.13 (Nimbus 7). 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...
  • Timation American navigation technology satellite. 2 launches, 1967.05.31 (Timation 1) and 1969.09.30 (Timation 2). More...
  • KH-4B American military surveillance satellite. 24 launches, 1967.09.15 (KH-4B 1101) to 1972.05.25 (KH-4B 1117). Early US reconnaissance satellite. Carried two 'J-3' panoramic cameras, with a focal length of 61 cm, and a ground resolution of 1.8 m. More...
  • SOICAL American military target satellite. 2 launches, 1969.09.30 (SOICAL Cone) and (SOICAL Cylinder). Space craft engaged in investigation of spaceflight techniques and technology. 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...
  • ASTEX American technology satellite. One launch, 1971.10.17. Space Test Program; technology experiments. More...
  • NOSS American military naval signals reconnaisance satellite. 22 launches, 1971.12.14 (OPS 7898 P/L 1) to 1993.08.02 (TLD). Ocean surveillance; aka White Cloud type spacecraft; Navy Ocean Surveillance Satellite; PARCAE. More...

See also
  • Delta The Delta launch vehicle was America's longest-lived, most reliable, and lowest-cost space launch vehicle. Development began in 1955 and it continued in service in the 21st Century despite numerous candidate replacements. More...

Associated Manufacturers and Agencies
  • Douglas American manufacturer of rockets, spacecraft, and rocket engines. Boeing Huntington Beach, Huntington Beach, CA, USA. More...

Associated Programs
  • ELINT Various US electronic intelligence satellites, most of them from the Naval Research Laboratory, were orbited in the 1960's and still remain classified. More...
  • Navstar The Navstar GPS (Global Positioning System) program was a joint service effort directed by the United States Department of Defence. Navstar GPS is a space-based radio-positioning system nominally consisting of a 24-satellite constellation that provides navigation and timing information to military and civilian users worldwide. In addition to the satellites, the system consists of a worldwide satellite control network and GPS receiver units that acquire the satellite's signals and translate them into position information. Originally envisioned as primarily a military system, GPS was found to have a wide variety of civilian applications, many of them never conceived by the original system's designers. 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 SLC1E Delta launch complex. Originally a Thor 75 SMS launch pad. Upgraded to a space launch complex in 1967. More...
  • Vandenberg SLC1W Delta launch complex. Originally a Thor 75 SMS launch pad. Upgraded to a space launch complex in 1966. More...
  • Vandenberg SLC2E Delta launch complex. Originally a Thor 75 SMS launch pad. Upgraded to a space launch complex in 1966. More...
  • Vandenberg SLC3W Delta, Atlas launch complex. First designated LC1-1 and used to launch Atlas Agena B with Samos payloads. After Samos cancellation, rebuilt in 1963 to support launch of KH-4 Corona spysats atop Thor-Agena. Refurbished in 1973 to accomodate surplus Atlas ICBM's in space launch role. More...

Associated Stages
  • Agena D Nitric acid/UDMH propellant rocket stage. Loaded/empty mass 6,821/673 kg. Thrust 71.17 kN. Vacuum specific impulse 300 seconds. One of the real workhorses of US space exploration, Agena was a restartable upper stage which was also employed as a spacecraft, the whole vehicle going into orbit. A mainstay of the US Air Force reconnaisance satellite program, it also boosted early NASA probes to the moon and planets. Agena played a key role in manned space flight as the target vehicle for rendezvous and docking manoeuvres in NASA's Gemini project. It More...
  • Castor 1 Solid propellant rocket stage. Loaded/empty mass 3,852/535 kg. Thrust 286.00 kN. Vacuum specific impulse 247 seconds. More...
  • Delta Thor LT Lox/Kerosene propellant rocket stage. Loaded/empty mass 70,354/3,715 kg. Thrust 866.71 kN. Vacuum specific impulse 290 seconds. More...

Thorad Agena D SLV-2G Chronology


1966 August 9 - . 20:46 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 506 / Agena D SS-01B 1631.
  • KH-4A 1036 - . Payload: KH-4A s/n 1036 / Agena D 1631 / OPS 1545. Mass: 1,500 kg (3,300 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4A. Decay Date: 1966-09-11 . USAF Sat Cat: 2393 . COSPAR: 1966-072A. Apogee: 284 km (176 mi). Perigee: 190 km (110 mi). Inclination: 100.1000 deg. Period: 89.20 min. Summary: KH-4A. All cameras operated satisfactorily..

1966 November 8 - . 19:53 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 507 / Agena D SS-01B 1632.
  • KH-4A 1037 - . Payload: KH-4A s/n 1037 / Agena D 1632 / OPS 1866. Mass: 1,500 kg (3,300 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4A. Decay Date: 1966-11-29 . USAF Sat Cat: 2537 . COSPAR: 1966-102A. Apogee: 300 km (180 mi). Perigee: 179 km (111 mi). Inclination: 100.0000 deg. Period: 89.20 min. Summary: KH-4A. Second pan geometry mission. Higher than normal base plus fog encountered on both main camera records..

1967 May 9 - . 21:50 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1E. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 508 / Agena D SS-01B 1634. FAILURE: Failure of the booster cut-off switch.. Failed Stage: 1.
  • KH-4A 1041 - . Payload: KH-4A s/n 1041 / Agena D 1634 / OPS 4696. Mass: 2,000 kg (4,400 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4A. Decay Date: 1967-07-13 . USAF Sat Cat: 2779 . COSPAR: 1967-043A. Apogee: 791 km (491 mi). Perigee: 183 km (113 mi). Inclination: 85.0000 deg. Period: 94.30 min. Summary: KH-4A. Due to the failure of the booster cut-off switch, the satellite went into a highly eccentric orbit. Significant image degradation..
  • OPS 1967 - . Payload: EHH B7. Nation: USA. Agency: USAF. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: SSF. Decay Date: 1993-03-14 . USAF Sat Cat: 2780 . COSPAR: 1967-043xx. Apogee: 145 km (90 mi). Perigee: 131 km (81 mi). Inclination: 84.9000 deg. Period: 87.20 min.
  • SRV 731 - . Payload: SRV 1041-1 / OPS 1967. Mass: 60 kg (132 lb). Nation: USA. Agency: NRO; USAF. Spacecraft: KH-4A. Decay Date: 1993-03-14 . USAF Sat Cat: 2780 . COSPAR: 1967-043B. Apogee: 458 km (284 mi). Perigee: 399 km (247 mi). Inclination: 84.9000 deg. Period: 93.20 min. Summary: Radar monitoring. Due to the failure of the booster cut-off switch, the satellite went into a highly eccentric orbit..

1967 June 16 - . 21:35 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 509 / Agena D SS-01B 1633.
  • KH-4A 1042 - . Payload: KH-4A s/n 1042 / Agena D 1633 / OPS 3559. Mass: 2,000 kg (4,400 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4A. Decay Date: 1967-07-20 . USAF Sat Cat: 2850 . COSPAR: 1967-062A. Apogee: 380 km (230 mi). Perigee: 169 km (105 mi). Inclination: 80.0000 deg. Period: 90.00 min. Summary: KH-4A. Small out-of-focus area in forward camera of 1042-1..
  • OPS 1873 - . Payload: EHH B8. Nation: USA. Agency: USAF. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: SSF. Decay Date: 1968-10-22 . USAF Sat Cat: 2851 . COSPAR: 1967-062xx. Apogee: 197 km (122 mi). Perigee: 182 km (113 mi). Inclination: 80.2000 deg. Period: 88.30 min.
  • SRV 725 - . Payload: SRV 1042-1 / OPS 1873. Mass: 60 kg (132 lb). Nation: USA. Agency: NRO; USAF. Spacecraft: KH-4A. Decay Date: 1968-10-22 . USAF Sat Cat: 2851 . COSPAR: 1967-062B. Apogee: 517 km (321 mi). Perigee: 501 km (311 mi). Inclination: 80.2000 deg. Period: 94.80 min. Summary: Radar monitoring..

1967 August 7 - . 21:44 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1E. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 510 / Agena D 1637.
  • KH-4A 1043 - . Payload: KH-4A s/n 1043 / Agena D 1637 / OPS 4827. Mass: 2,000 kg (4,400 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4A. Decay Date: 1967-09-01 . USAF Sat Cat: 2910 . COSPAR: 1967-076A. Apogee: 346 km (214 mi). Perigee: 174 km (108 mi). Inclination: 79.9000 deg. Period: 89.70 min. Summary: KH-4A. Forward camera film came out of the rails on pass 230D. Film degraded past this point..

1967 September 15 - . 19:41 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 512 / Agena D 1641.
  • KH-4B 1101 - . Payload: KH-4B s/n 1101 / Agena D 1641 / OPS 5089. Mass: 2,000 kg (4,400 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4B. Decay Date: 1967-10-04 . USAF Sat Cat: 2946 . COSPAR: 1967-087A. Apogee: 372 km (231 mi). Perigee: 156 km (96 mi). Inclination: 80.0000 deg. Period: 89.70 min. Summary: KH-4B. First mission of the KH-4B series. Best film to date..

1967 November 2 - . 21:31 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1E. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 513 / Agena D 1639.
  • KH-4A 1044 - . Payload: KH-4A s/n 1044 / OPS 0562. Mass: 2,000 kg (4,400 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4A. Decay Date: 1967-12-02 . USAF Sat Cat: 3024 . COSPAR: 1967-109A. Apogee: 410 km (250 mi). Perigee: 184 km (114 mi). Inclination: 81.5000 deg. Period: 90.40 min. Summary: KH-4A. All cameras operated fine..
  • SRV 733 - . Payload: SRV 1044-1 / OPS 1587. Mass: 60 kg (132 lb). Nation: USA. Agency: NRO; USAF. Spacecraft: KH-4A. Decay Date: 1969-03-28 . USAF Sat Cat: 3025 . COSPAR: 1967-109B. Apogee: 525 km (326 mi). Perigee: 454 km (282 mi). Inclination: 81.6000 deg. Period: 94.30 min. Summary: Radar monitoring..
  • OPS 1587 - . Payload: EHH B9. Nation: USA. Agency: USAF. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: SSF. Decay Date: 1969-03-28 . USAF Sat Cat: 3025 . COSPAR: 1967-109xx. Apogee: 208 km (129 mi). Perigee: 179 km (111 mi). Inclination: 81.6000 deg. Period: 88.40 min.

1967 December 9 - . 22:26 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 514 / Agena D 1642.
  • KH-4B 1102 - . Payload: KH-4B s/n 1102 / Agena D 1642 / OPS 1001. Mass: 2,000 kg (4,400 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4B. Decay Date: 1967-12-25 . USAF Sat Cat: 3063 . COSPAR: 1967-122A. Apogee: 248 km (154 mi). Perigee: 151 km (93 mi). Inclination: 81.6000 deg. Period: 88.40 min. Summary: KH-4B. Noticeable image smear for forward camera, but best imagery to date..

1968 January 24 - . 22:26 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1E. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 516 / Agena D 1640.
  • KH-4A 1045 - . Payload: KH-4A s/n 1045 / Agena D 1640 / OPS 2243. Mass: 2,000 kg (4,400 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4A. Decay Date: 1968-02-27 . USAF Sat Cat: 3113 . COSPAR: 1968-008A. Apogee: 438 km (272 mi). Perigee: 179 km (111 mi). Inclination: 81.5000 deg. Period: 90.70 min. Summary: KH-4A. All cameras operated satisfactorily..
  • SRV 741 - . Payload: SRV 1045-1 / OPS 6236. Mass: 60 kg (132 lb). Nation: USA. Agency: NRO; USAF. Spacecraft: KH-4A. Decay Date: 1970-03-04 . USAF Sat Cat: 3114 . COSPAR: 1968-008B. Apogee: 545 km (338 mi). Perigee: 470 km (290 mi). Inclination: 81.7000 deg. Period: 94.70 min. Summary: Radar monitoring..
  • OPS 6236 - . Payload: EHH B10. Nation: USA. Agency: USAF. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: SSF. Decay Date: 1970-03-04 . USAF Sat Cat: 3114 . COSPAR: 1968-008xx. Apogee: 186 km (115 mi). Perigee: 185 km (114 mi). Inclination: 81.6000 deg. Period: 88.20 min.

1968 March 14 - . 22:00 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1E. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 518 / Agena D 1638.
  • KH-4A 1046 - . Payload: KH-4A s/n 1046 / Agena D 1638 / OPS 4849. Mass: 2,000 kg (4,400 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4A. Decay Date: 1968-04-10 . USAF Sat Cat: 3152 . COSPAR: 1968-020A. Apogee: 390 km (240 mi). Perigee: 183 km (113 mi). Inclination: 83.0000 deg. Period: 90.20 min. Summary: KH-4A. Image quality good for 1046-1 and fair for 1046-2..
  • OPS 7076 - . Payload: EHH B11. Nation: USA. Agency: USAF. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: SSF. Decay Date: 1970-01-03 . USAF Sat Cat: 3153 . COSPAR: 1968-020xx. Apogee: 189 km (117 mi). Perigee: 189 km (117 mi). Inclination: 83.0000 deg. Period: 88.30 min.
  • SRV 747 - . Payload: SRV 1046-1 / OPS 7076. Mass: 60 kg (132 lb). Nation: USA. Agency: NRO; USAF. Spacecraft: KH-4A. Decay Date: 1970-01-03 . USAF Sat Cat: 3153 . COSPAR: 1968-020B. Apogee: 524 km (325 mi). Perigee: 481 km (298 mi). Inclination: 83.1000 deg. Period: 94.60 min. Summary: Radar monitoring..

1968 May 1 - . 21:31 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 511 / Agena D 1643.
  • KH-4B 1103 - . Payload: KH-4B s/n 1103 / OPS 1419. Mass: 2,000 kg (4,400 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4B. Decay Date: 1968-05-15 . USAF Sat Cat: 3228 . COSPAR: 1968-039B. Apogee: 243 km (150 mi). Perigee: 164 km (101 mi). Inclination: 83.1000 deg. Period: 88.60 min. Summary: KH-4B. Out-of-focus imagery is present on both main camera records..
  • SRV 807 - . Payload: SRV 1103-1. Nation: USA. Agency: USAF. Spacecraft: KH-4B. Decay Date: 1968-05-20 . USAF Sat Cat: 3232 . COSPAR: 1968-039C. Apogee: 199 km (123 mi). Perigee: 142 km (88 mi). Inclination: 83.0000 deg. Period: 87.90 min.

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 June 20 - . 21:46 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1E. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 517 / Agena D 1645.
  • KH-4A 1047 - . Payload: KH-4A s/n 1047 / Agena D 1645 / OPS 5343. Mass: 2,000 kg (4,400 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4A. Decay Date: 1968-07-16 . USAF Sat Cat: 3296 . COSPAR: 1968-052A. Apogee: 402 km (249 mi). Perigee: 183 km (113 mi). Inclination: 85.0000 deg. Period: 90.30 min. Summary: KH-4A. Out-of-focus imagery is present on both main camera records..
  • OPS 5259 - . Payload: EHH B12. Nation: USA. Agency: USAF. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: SSF. Decay Date: 1970-01-11 . USAF Sat Cat: 3297 . COSPAR: 1968-052xx. Apogee: 180 km (110 mi). Perigee: 180 km (110 mi). Inclination: 85.1000 deg. Period: 88.10 min.
  • SRV 745 - . Payload: SRV 1047-1 / OPS 5259. Mass: 60 kg (132 lb). Nation: USA. Agency: NRO; USAF. Spacecraft: KH-4A. Decay Date: 1970-01-11 . USAF Sat Cat: 3297 . COSPAR: 1968-052B. Apogee: 514 km (319 mi). Perigee: 435 km (270 mi). Inclination: 85.1000 deg. Period: 94.10 min. Summary: Radar monitoring..

1968 August 7 - . 21:36 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 522 / Agena D 1644.
  • KH-4B 1104 - . Payload: KH-4B s/n 1104 / Agena D 1644 / OPS 5955. Mass: 3,000 kg (6,600 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4B. Decay Date: 1968-08-27 . USAF Sat Cat: 3336 . COSPAR: 1968-065A. Apogee: 259 km (160 mi). Perigee: 160 km (90 mi). Inclination: 82.1000 deg. Period: 88.70 min. Summary: KH-4B. Best imagery to date on any KH-4 systems. Bicolor and color infrared experiments were conducted on this mission..

1968 September 18 - . 21:32 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1E. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 524 / Agena D 1647.
  • KH-4A 1048 - . Payload: KH-4A s/n 1048 / Agena D 1647 / OPS 0165. Mass: 2,000 kg (4,400 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4A. Decay Date: 1968-10-08 . USAF Sat Cat: 3408 . COSPAR: 1968-078A. Apogee: 393 km (244 mi). Perigee: 167 km (103 mi). Inclination: 83.0000 deg. Period: 90.10 min. Summary: KH-4A. Film in the forward camera separated and camera failed on mission 1048-2, also the stellar/index camera unit failed..
  • SRV 749 - . Payload: SRV 1048-1 / OPS 8595. Mass: 60 kg (132 lb). Nation: USA. Agency: NRO; USAF. Spacecraft: KH-4A. Decay Date: 1969-09-28 . USAF Sat Cat: 3409 . COSPAR: 1968-078B. Apogee: 514 km (319 mi). Perigee: 500 km (310 mi). Inclination: 83.2000 deg. Period: 94.80 min. Summary: Radar monitoring..
  • OPS 8595 - . Payload: EHH B13. Nation: USA. Agency: USAF. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: SSF. Decay Date: 1969-09-28 . USAF Sat Cat: 3409 . COSPAR: 1968-078xx. Apogee: 236 km (146 mi). Perigee: 211 km (131 mi). Inclination: 83.2000 deg. Period: 89.00 min.

1968 October 5 - . 11:16 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 521 / Agena D 2734.
  • OPS 0964 - . Payload: Ferret 13 / Agena D 2734. Mass: 1,500 kg (3,300 lb). Nation: USA. Agency: NRO; USAF. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: Ferret. Decay Date: 1971-03-26 . USAF Sat Cat: 3472 . COSPAR: 1968-086A. Apogee: 511 km (317 mi). Perigee: 483 km (300 mi). Inclination: 75.0000 deg. Period: 94.60 min.

1968 November 3 - . 21:30 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 515 / Agena D 1646.
  • KH-4B 1105 - . Payload: KH-4B s/n 1105 / Agena D 1646 / OPS 1315. Mass: 2,000 kg (4,400 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4B. Decay Date: 1968-11-23 . USAF Sat Cat: 3531 . COSPAR: 1968-098A. Apogee: 288 km (178 mi). Perigee: 150 km (90 mi). Inclination: 82.2000 deg. Period: 88.90 min. Summary: KH-4B. Image quality is variable and displays areas of soft focus and image smear..

1968 December 12 - . 22:22 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 527 / Agena D 1648.
  • KH-4A 1049 - . Payload: KH-4A s/n 1049 / Agena D 1648 / OPS 4740. Mass: 2,000 kg (4,400 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4A. Decay Date: 1968-12-28 . USAF Sat Cat: 3604 . COSPAR: 1968-112A. Apogee: 248 km (154 mi). Perigee: 169 km (105 mi). Inclination: 81.0000 deg. Period: 88.70 min. Summary: KH-4A. Degraded film.
  • SRV 751 - . Payload: SRV 1049-1 / OPS 7684. Mass: 60 kg (132 lb). Nation: USA. Agency: NRO; USAF. Spacecraft: KH-4A. USAF Sat Cat: 3605 . COSPAR: 1968-112B. Apogee: 1,466 km (910 mi). Perigee: 1,380 km (850 mi). Inclination: 80.4000 deg. Period: 114.30 min. Summary: ABM monitoring..
  • OPS 7684 - . Payload: EHH C1. Nation: USA. Agency: USAF. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: SSF. USAF Sat Cat: 3605 . COSPAR: 1968-112xx. Apogee: 1,466 km (910 mi). Perigee: 1,378 km (856 mi). Inclination: 80.4000 deg. Period: 114.30 min.

1969 February 5 - . 21:59 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 519 / Agena D 1650.
  • KH-4B 1106 - . Payload: KH-4B s/n 1106 / Agena D 1650 / OPS 3890. Mass: 2,000 kg (4,400 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4B. Decay Date: 1969-02-24 . USAF Sat Cat: 3672 . COSPAR: 1969-010A. Apogee: 275 km (170 mi). Perigee: 147 km (91 mi). Inclination: 81.6000 deg. Period: 88.70 min. Summary: KH-4B. The best image quality to date..
  • OPS 2644 - . Payload: EHH C2. Nation: USA. Agency: USAF. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: SSF. USAF Sat Cat: 3673 . COSPAR: 1969-010xx. Apogee: 1,429 km (887 mi). Perigee: 1,391 km (864 mi). Inclination: 80.4000 deg. Period: 114.00 min.
  • SRV 801R - . Payload: SRV 1106-1 / OPS 2644. Mass: 60 kg (132 lb). Nation: USA. Agency: NRO; USAF. Spacecraft: KH-4B. USAF Sat Cat: 3673 . COSPAR: 1969-010B. Apogee: 1,428 km (887 mi). Perigee: 1,391 km (864 mi). Inclination: 80.4000 deg. Period: 114.00 min. Summary: ABM monitoring..

1969 March 19 - . 21:38 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 541 / Agena D 1651.
  • KH-4A 1050 - . Payload: KH-4A s/n 1050 / Agena D 1651 / OPS 3722. Mass: 2,000 kg (4,400 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4A. Decay Date: 1969-03-24 . USAF Sat Cat: 3829 . COSPAR: 1969-026A. Apogee: 252 km (156 mi). Perigee: 165 km (102 mi). Inclination: 82.9000 deg. Period: 88.60 min. Summary: KH-4A. Due to abnormal rotational rates after revolution 22, the mission was terminated after a total of three days collecting photography..
  • OPS 2285 - . Payload: EHH B14. Nation: USA. Agency: USAF. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: SSF. Decay Date: 1971-12-06 . USAF Sat Cat: 3830 . COSPAR: 1969-026xx. Apogee: 168 km (104 mi). Perigee: 168 km (104 mi). Inclination: 83.0000 deg. Period: 87.90 min.
  • SRV 737 - . Payload: SRV 1050-1 / OPS 2285. Mass: 60 kg (132 lb). Nation: USA. Agency: NRO; USAF. Spacecraft: KH-4A. Decay Date: 1971-12-06 . USAF Sat Cat: 3830 . COSPAR: 1969-026B. Apogee: 515 km (320 mi). Perigee: 502 km (311 mi). Inclination: 83.1000 deg. Period: 94.70 min. Summary: Radar monitoring..

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 May 2 - . 01:46 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 544 / Agena D 1649.
  • KH-4A 1051 - . Payload: KH-4A s/n 1051 / Agena D 1649 / OPS 1101. Mass: 2,000 kg (4,400 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4A. Decay Date: 1969-05-23 . USAF Sat Cat: 3914 . COSPAR: 1969-041A. Apogee: 325 km (201 mi). Perigee: 168 km (104 mi). Inclination: 64.9000 deg. Period: 89.50 min. Summary: KH-4A. Imagery of both pan camera records is soft and lacks crispness and edge sharpness..
  • OPS 1721 - . Payload: EHH B15. Nation: USA. Agency: USAF. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: SSF. Decay Date: 1970-02-16 . USAF Sat Cat: 3915 . COSPAR: 1969-041xx. Apogee: 193 km (119 mi). Perigee: 177 km (109 mi). Inclination: 65.7000 deg. Period: 88.20 min.
  • SRV 739 - . Payload: SRV 1051-1 / OPS 1721. Mass: 60 kg (132 lb). Nation: USA. Agency: NRO; USAF. Spacecraft: KH-4A. Decay Date: 1970-02-16 . USAF Sat Cat: 3915 . COSPAR: 1969-041B. Apogee: 470 km (290 mi). Perigee: 407 km (252 mi). Inclination: 65.7000 deg. Period: 93.30 min. Summary: Radar monitoring..

1969 July 31 - . 10:19 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 523 / Agena D 2735.
  • OPS 8285 - . Payload: Ferret 14 / Agena D 2735. Mass: 1,500 kg (3,300 lb). Nation: USA. Agency: NRO; USAF. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: Ferret. Decay Date: 1973-01-04 . USAF Sat Cat: 4054 . COSPAR: 1969-065A. Apogee: 536 km (333 mi). Perigee: 465 km (288 mi). Inclination: 75.0000 deg. Period: 94.60 min.

1969 September 22 - . 21:11 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 531 / Agena D 1653.
  • KH-4A 1052 - . Payload: KH-4A s/n 1052 / Agena D 1653 / OPS 3531. Mass: 2,000 kg (4,400 lb). Nation: USA. Agency: NRO; CIA. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4A. Decay Date: 1969-10-12 . USAF Sat Cat: 4102 . COSPAR: 1969-079A. Apogee: 253 km (157 mi). Perigee: 178 km (110 mi). Inclination: 85.0000 deg. Period: 88.80 min. Summary: KH-4A. Last of the KH-4A missions, all camera systems operated satisfactorily..
  • OPS 4710 - . Payload: EHH B16. Nation: USA. Agency: USAF. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: SSF. Decay Date: 1971-05-16 . USAF Sat Cat: 4103 . COSPAR: 1969-079xx. Apogee: 211 km (131 mi). Perigee: 211 km (131 mi). Inclination: 85.1000 deg. Period: 88.70 min.
  • SRV 743R - . Payload: SRV 1052-1 / OPS 4710. Mass: 60 kg (132 lb). Nation: USA. Agency: NRO; USAF. Spacecraft: KH-4A. Decay Date: 1971-05-16 . USAF Sat Cat: 4103 . COSPAR: 1969-079B. Apogee: 496 km (308 mi). Perigee: 490 km (300 mi). Inclination: 85.2000 deg. Period: 94.50 min. Summary: Radar monitoring. Last of the KH-4A missions..

1969 September 30 - . 13:40 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 525.
  • OPS 1807 - . Payload: EHH B17. Mass: 60 kg (132 lb). Nation: USA. Agency: NRO; USAF. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: SSF. Decay Date: 1970-10-30 . USAF Sat Cat: 4111 . COSPAR: 1969-082A. Apogee: 484 km (300 mi). Perigee: 446 km (277 mi). Inclination: 69.6000 deg. Period: 93.90 min.
  • Surcal - . Payload: NRL PL164 / OPS 7613. Mass: 40 kg (88 lb). Nation: USA. Agency: NRL. Program: ELINT. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: NRL ELINT. USAF Sat Cat: 4295 . COSPAR: 1969-082G. Apogee: 926 km (575 mi). Perigee: 899 km (558 mi). Inclination: 70.0000 deg. Period: 103.30 min. Summary: Identified by McDowell as probable NRL ELINT satellite..
  • SOICAL Cone - . Payload: S69-4 Cone. Nation: USA. Agency: NRL. Class: Military. Type: Radar calibration target. Spacecraft: SOICAL. USAF Sat Cat: 4132 . COSPAR: 1969-082K. Apogee: 870 km (540 mi). Perigee: 844 km (524 mi). Inclination: 70.0000 deg. Period: 102.10 min. Summary: Space craft engaged in investigation of spaceflight techniques and technology (US Cat A)..
  • Tempsat 2 - . Nation: USA. Agency: NRL. Class: Military. Type: Radar calibration target. Spacecraft: Tempsat. USAF Sat Cat: 4168 . COSPAR: 1969-082H. Apogee: 924 km (574 mi). Perigee: 899 km (558 mi). Inclination: 70.0000 deg. Period: 103.20 min. Summary: Space craft engaged in investigation of spaceflight techniques and technology (US Cat A)..
  • Surcal - . Payload: NRL PL163 / OPS 7613. Nation: USA. Agency: NRL. Class: Military. Type: Radar calibration target. Spacecraft: Surcal. USAF Sat Cat: 4247 . COSPAR: 1969-082F. Apogee: 925 km (574 mi). Perigee: 898 km (557 mi). Inclination: 70.0000 deg. Period: 103.20 min. Summary: Space craft engaged in investigation of spaceflight techniques and technology (US Cat A)..
  • Surcal - . Payload: NRL PL162 / OPS 7613. Nation: USA. Agency: NRL. Class: Military. Type: Radar calibration target. Spacecraft: Surcal. USAF Sat Cat: 4237 . COSPAR: 1969-082E. Apogee: 925 km (574 mi). Perigee: 899 km (558 mi). Inclination: 70.0000 deg. Period: 103.30 min. Summary: Space craft engaged in investigation of spaceflight techniques and technology (US Cat A)..
  • Surcal - . Payload: NRL PL161 / OPS 7613. Nation: USA. Agency: NRL. Class: Military. Type: Radar calibration target. Spacecraft: Surcal. USAF Sat Cat: 4259 . COSPAR: 1969-082D. Apogee: 928 km (576 mi). Perigee: 899 km (558 mi). Inclination: 70.0000 deg. Period: 103.30 min. Summary: Space craft engaged in investigation of spaceflight techniques and technology (US Cat A)..
  • Timation 2 - . Mass: 700 kg (1,540 lb). Nation: USA. Agency: NRL. Program: Navstar. Class: Technology. Type: Navigation technology satellite. Spacecraft: Timation. USAF Sat Cat: 4257 . COSPAR: 1969-082C. Apogee: 925 km (574 mi). Perigee: 898 km (557 mi). Inclination: 70.0000 deg. Period: 103.20 min. Summary: Navigation experiments leading eventually to Navstar/GPS system. Operated for 6 years..
  • Surcal - . Payload: NRL PL176 / OPS 7613. Nation: USA. Agency: NRL. Class: Military. Type: Radar calibration target. Spacecraft: Surcal. USAF Sat Cat: 4256 . COSPAR: 1969-082B. Apogee: 918 km (570 mi). Perigee: 893 km (554 mi). Inclination: 70.0000 deg. Period: 103.10 min. Summary: Space craft engaged in investigation of spaceflight techniques and technology (US Cat A)..
  • SOICAL Cylinder - . Payload: S69-4 Cylinder. Nation: USA. Agency: NRL. Class: Military. Type: Radar calibration target. Spacecraft: SOICAL. USAF Sat Cat: 4166 . COSPAR: 1969-082J. Apogee: 812 km (504 mi). Perigee: 791 km (491 mi). Inclination: 70.0000 deg. Period: 100.90 min. Summary: Space craft engaged in investigation of spaceflight techniques and technology (US Cat A)..

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). .

1970 August 26 - . 10:01 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 535 / Agena D 2736.
  • OPS 8329 - . Payload: Ferret 15. Mass: 1,500 kg (3,300 lb). Nation: USA. Agency: NRO; USAF. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: Ferret. Decay Date: 1975-03-26 . USAF Sat Cat: 4503 . COSPAR: 1970-066A. Apogee: 499 km (310 mi). Perigee: 496 km (308 mi). Inclination: 75.0000 deg. Period: 94.50 min.

1971 October 17 - . 13:36 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 570.
  • ASTEX - . Payload: P71-2 / Agena D. Mass: 1,500 kg (3,300 lb). Nation: USA. Agency: USAF STP. Class: Technology. Type: Navigation technology satellite. Spacecraft: ASTEX. USAF Sat Cat: 5560 . COSPAR: 1971-089A. Apogee: 761 km (472 mi). Perigee: 738 km (458 mi). Inclination: 92.7000 deg. Period: 99.80 min. Summary: Space Test Program; technology experiments. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .

1971 December 14 - . 12:13 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 568.
  • OPS 7898 P/L 1 - . Payload: NRL PL171 / OPS 7898. Mass: 700 kg (1,540 lb). Nation: USA. Agency: NRL. Spacecraft: NOSS. USAF Sat Cat: 5678 . COSPAR: 1971-110A. Apogee: 999 km (620 mi). Perigee: 983 km (610 mi). Inclination: 70.0000 deg. Period: 104.90 min. Summary: Ocean surveillance; White Cloud (?) type spacecraft; test flight. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .
  • OPS 7898 P/L 3 - . Payload: NRL PL173 / OPS 7898. Nation: USA. Agency: NRL. Spacecraft: NOSS. USAF Sat Cat: 5681 . COSPAR: 1971-110D. Apogee: 997 km (619 mi). Perigee: 982 km (610 mi). Inclination: 70.0000 deg. Period: 104.90 min. Summary: Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .
  • OPS 7898 P/L 4 - . Payload: NRL PL174 / OPS 7898. Nation: USA. Agency: NRL. Spacecraft: NOSS. USAF Sat Cat: 5682 . COSPAR: 1971-110E. Apogee: 997 km (619 mi). Perigee: 981 km (609 mi). Inclination: 70.0000 deg. Period: 104.90 min. Summary: Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .
  • OPS 7898 P/L 2 - . Payload: NRL PL172 / OPS 7898. Nation: USA. Agency: NRL. Spacecraft: NOSS. USAF Sat Cat: 5680 . COSPAR: 1971-110C. Apogee: 999 km (620 mi). Perigee: 983 km (610 mi). Inclination: 70.0000 deg. Period: 104.90 min. Summary: Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .

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