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P
P designations were given to a series of classified US military technology and operational satellites launched from the 1960's.

Status: Operational 1960.



Subtopics

P-14 American solar satellite. Magnetic field data. Research satellite built by NASA, Goddard Space Flight Center for NASA, USA. Launched 1961.

P-102 / P-698BK / P-770 (Agena-B based) ELINT, SIGINT satellite built by Lockheed for USAF, USA. Launched 1962-1963.

P-102 / P-698BK / P-770 (Agena-D based) ELINT, SIGINT satellite built by Lockheed (prime) for USAF, USA. Launched 1964-1966.

RM 18 & Null

UVR (P68-1) Null

P 72 American military technology satellite. Unknown satellite lost on a single Atlas launch failure. Evidently not repeated.

RM 20 (P72-2) Experimental satellite built by Rockwell International for USAF STP (Space Test Program), USA. Launched 1975.

P 76 American communications technology satellite. Communications propagation experiments.

P-11 5103, ..., 5105 (USA 32, 45, 81) ELINT or wide area surveillance satellite, USA. Launched 1988 - 1992.

P 21, 21A Ionospheric research (suborbital) satellite operated by NASA, USA.

P80-2 Technology, science satellite built by Lockheed Missiles and Space Co., Ball Space Systems, Jet Propulsion Laboratory (JPL) for US Air Force.



1961 February 25 - . 00:13 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC26B. LV Family: Jupiter. Launch Vehicle: Juno II. FAILURE: Third Stage failed to ignite.. Failed Stage: 3.
  • Explorer - . Payload: S-45. Mass: 34 kg (74 lb). Nation: USA. Agency: NASA. Program: Explorer. Class: Astronomy. Type: Solar satellite. Spacecraft Bus: P. Spacecraft: P-14. Decay Date: 1961-02-24 .

1961 March 25 - . 15:17 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Thor. Launch Vehicle: Thor Delta.
  • Explorer 10 - . Payload: P-14. Mass: 35 kg (77 lb). Nation: USA. Agency: NASA. Program: Explorer. Class: Astronomy. Type: Solar satellite. Spacecraft Bus: P. Spacecraft: P-14. Decay Date: 1961-06-30 . USAF Sat Cat: 98 . COSPAR: 1961-Kappa-1. Apogee: 181,100 km (112,500 mi). Perigee: 221 km (137 mi). Inclination: 33.0000 deg. Period: 5,013.90 min. Magnetic field data. Decay date suspect Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B)..

1961 May 24 - . 19:48 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC26B. LV Family: Jupiter. Launch Vehicle: Juno II. FAILURE: Second Stage failed to ignite.. Failed Stage: 2.
  • Explorer S-45A - . Payload: S-45A. Mass: 33 kg (72 lb). Nation: USA. Agency: NASA. Program: Explorer. Class: Astronomy. Type: Solar satellite. Spacecraft Bus: P. Spacecraft: P-14. Decay Date: 1961-05-24 .

1975 April 13 - . 00:51 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Atlas. Launch Vehicle: Atlas F. FAILURE: First stage failure due to explosion in flame pit at lift-off.. Failed Stage: 1.
  • P 72-2 - . Nation: USA. Agency: USAF. Class: Technology. Type: Military technology satellite. Spacecraft Bus: P. Spacecraft: P 72. Decay Date: 1975-04-12 .

    Space Test Program flight P72-2 was launched; it carried two infrared radiometers and three other payloads. The launch failed when the Atlas F launch vehicle malfunctioned. A lack of deluge water and collection in the flame bucket of a kerosene/liquid oxygen gel led to the explosion of the gel on lift-off, damaging one of the Atlas engines and leading to complete engine failure during the ascent.


1976 May 22 - . 07:42 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC5. LV Family: Scout. Launch Vehicle: Scout B-1.
  • P 76-5 - . Mass: 73 kg (160 lb). Nation: USA. Agency: USAF STP. Class: Technology. Type: Communications technology satellite. Spacecraft Bus: P. Spacecraft: P 76. USAF Sat Cat: 8860 . COSPAR: 1976-047A. Apogee: 1,044 km (648 mi). Perigee: 981 km (609 mi). Inclination: 99.6000 deg. Period: 105.40 min.

    A Scout vehicle carrying a Space Test Program spacecraft was successfully launched from SLC-5 at the Western Test Range. The spacecraft, Flight P76-5, carried a wideband signals experiment sponsored by the Defense Nuclear Agency. Communications propagation experiments.



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