KH-5 Argon

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KH-5 Argon
Manufacturer Lockheed Corporation
Country of origin United States
Operator NRO
Applications Reconnaissance
Geodetic mapping
Specifications
Bus RM-81 Agena
Launch mass1,274 kg (2,809 lb)
EquipmentOptical cameras
556 x 556 km coverage
140 m resolution
Regime LEO
Dimensions
Production
StatusRetired
Launched12
Retired5
Failed4
Lost3
Related spacecraft
Derived from CORONA
A KH 5 ARGON (with Agena-B service module) main features. KH-5 ARGON (Agena-B).jpg
A KH 5 ARGON (with Agena-B service module) main features.
A KH 5 ARGON (with Agena-D service module) main features. KH-5 ARGON (Agena-D).jpg
A KH 5 ARGON (with Agena-D service module) main features.

KH-5 ARGON was a series of reconnaissance satellites produced by the United States from February 1961 to August 1964. The KH-5 operated similarly to the CORONA series of satellites, as it ejected a canister of photographic film. At least 12 missions were attempted, but at least 7 resulted in failure. The satellite was manufactured by Lockheed. Launches used Thor-Agena launch vehicles flying from Vandenberg Air Force Base, with the payload being integrated into the Agena.

Contents

Payload

Different versions of the satellite varied in mass from 1,110 to 1,500 kg (2,450 to 3,310 lb). At least two missions deployed ELINT subsatellites. Ground resolution for the satellite was 140 m (460 ft), with a swath of 556 km (345 mi). The onboard camera had a focal length of 76 mm. The purpose of the system, which produced relatively low-resolution images compared to other spy satellites, was to provide imagery for cartography purposes. This was one of the tasks that had originally been planned for the SAMOS series of satellites equipped with the (quickly cancelled) E-4 cameras. Each satellite took photographs for less than a week before returning its film.

The satellite was in use during the same period as the KH-2 to KH-4A CORONA and the KH-6 LANYARD satellites. Later satellites were the KH-4B and KH-7 GAMBIT. Images from three of the successful missions returned the first images of Antarctica from space. [1]

Satellites

Discoverer 20 (KH-5 9014A), was a USAF photographic reconnaissance satellite under the supervision of the National Reconnaissance Office (NRO). Discoverer 20 was the first KH-5 ARGON satellite to be launched. The launch occurred at 20:24:00 GMT on 17 February 1961. A Thor DM-21 Agena-B launch vehicle was used, flying from LC 75-3-4 at the Vandenberg Air Force Base. It was assigned the Harvard designation 1961 Epsilon 1. Discoverer 20 was operated in an Earth orbit, with a perigee of 283 km (176 mi), an apogee of 770 km (480 mi), 80.91° of inclination, and a period of 95.81 minutes. The satellite was equipped with a camera with a focal length of 76 mm, which had a resolution of 140 m (460 ft). Images were recorded onto 127 mm film, and were to have been returned in a Satellite Recovery Vehicle (SRV) before the satellite ceased operations. The satellite weighed 1,110 kg (2,450 lb). Recovery of the capsule was not attempted due to a system malfunction, and thus the scientific experiment data obtained were limited. Discoverer 20 decayed on 28 July 1962. [2]

Launches

NameLaunch Date NSSDC ID Alt NameAlt NameMass (kg)Decay DateNotes
KH-5 9014A1961-02-17 1961-005A Discoverer 201961 Epsillon 111101962-07-28Film capsule not ejected.
KH-5 9016A1961-04-08 1961-011A Discoverer 231961 Lambda 111501962-04-16Film capsule ejected into wrong orbit, not recovered.
KH-5 9018A 1961-06-08 DISC24 Discoverer 241961-F051150---Failed to orbit.
KH-5 9020A1961-07-21 DISC27 Discoverer 271961-F071150---Failed to orbit.
KH-5 9034A1962-05-15 1962-018A FTV 11261962 Sigma11501962-06-20Successful.
KH-5 9042A1962-09-01 1962-044A FTV 11321962 A Upsillon11501962-10-01Film capsule sank.
KH-5 9046A1962-10-09 1962-053A FTV 11341962 B Epsillon15001962-10-17Successful.
KH-5 9055A1963-04-26 1963-004X OPS 10081963-F071150---Failed to orbit.
KH-5 9058A1963-08-29 1963-035A OPS 156110001963-09-30Successful; deployed ELINT subsatellite.
KH-5 9059A1963-10-29 1963-042A OPS 243715001963-11-29Successful; deployed ELINT subsatellite.
KH-5 9065A1964-06-13 1964-030A OPS 323615001964-07-14Successful.
KH-5 9066A1964-08-21 1964-048A OPS 273915001964-09-20Successful.

See also

Related Research Articles

<span class="mw-page-title-main">CORONA (satellite)</span> American reconnaissance satellites (1959–1972)

The Corona program was a series of American strategic reconnaissance satellites produced and operated by the Central Intelligence Agency (CIA) Directorate of Science & Technology with substantial assistance from the U.S. Air Force. The CORONA satellites were used for photographic surveillance of the Soviet Union (USSR), China, and other areas beginning in June 1959 and ending in May 1972.

<span class="mw-page-title-main">KH-6 Lanyard</span> Series of unsuccessful reconnaissance satellites by the United States

BYEMAN codenamed LANYARD, the KH-6 was the unsuccessful first attempt to develop and deploy a very high-resolution optical reconnaissance satellite by the United States National Reconnaissance Office. Launches and launch attempts spanned the period from March to July 1963. The project was quickly put together to get imagery of a site near Leningrad suspected of having anti-ballistic missiles. The satellite carried Itek's "E-5" camera developed for the SAMOS program, which had been cancelled. The camera had a focal length of 1.67 m and could discern objects on the ground 1.8 m in size. The ground swath of the camera was 14 km × 74 km. The satellite weighed 1,500 kg (3,300 lb), and had a single re-entry vehicle in which exposed film was returned to earth for a mid-air aircraft recovery. The KH-6 was manufactured by Lockheed Martin and launched from Vandenberg Air Force Base on Thor-Agena D launch vehicles.

<span class="mw-page-title-main">KH-7 Gambit</span> Series of United States reconnaissance satellites

BYEMAN codenamed GAMBIT, the KH-7 was a reconnaissance satellite used by the United States from July 1963 to June 1967. Like the older CORONA system, it acquired imagery intelligence by taking photographs and returning the undeveloped film to earth. It achieved a typical ground-resolution of 0.61 m to 0.91 m. Though most of the imagery from the KH-7 satellites was declassified in 2002, details of the satellite program remained classified until 2011.

<span class="mw-page-title-main">KH-8 Gambit 3</span> Series of United States reconnaissance satellites

The KH-8 was a long-lived series of reconnaissance satellites of the "Key Hole" (KH) series used by the United States from July 1966 to April 1984, and also known as Low Altitude Surveillance Platform. The satellite ejected "film-bucket" canisters of photographic film that were retrieved as they descended through the atmosphere by parachute. Ground resolution of the mature satellite system was better than 4 inches (0.10 m). There were 54 launch attempts of the 3,000 kilogram satellites, all from Vandenberg Air Force Base, on variants of the Titan III rocket. Three launches failed to achieve orbit. The first one was satellite #5 on April 26, 1967, which fell into the Pacific Ocean after the Titan second stage developed low thrust. The second was satellite #35 on May 20, 1972, which suffered an Agena pneumatic regulator failure and reentered the atmosphere. A few months later, pieces of the satellite turned up in England and the US managed to arrange for their hasty return. The third failure was satellite #39 on June 26, 1973, which suffered a stuck Agena fuel valve. The Bell 8096 engine failed to start and the satellite burned up in the atmosphere. The KH-8 was manufactured by Lockheed. The camera system/satellite was manufactured by Eastman Kodak's A&O Division in Rochester, New York.

<span class="mw-page-title-main">Samos (satellite)</span> Series of reconnaissance satellites for the United States

The SAMOS or SAMOS-E program was a relatively short-lived series of reconnaissance satellites for the United States in the early 1960s, also used as a cover for the initial development of the KH-7 GAMBIT system. Reconnaissance was performed with film cameras and television surveillance from polar low Earth orbits with film canister returns and transmittals over the United States. SAMOS was first launched in 1960 from Vandenberg Air Force Base.

Discoverer 20, also known as KH-5 9014A, was a USAF photographic reconnaissance satellite under the supervision of the National Reconnaissance Office (NRO) which was launched in 1961. Discoverer 20 was the first KH-5 ARGON satellite to be launched.

Discoverer 23, also known as KH-5 9016A, was a USAF photographic reconnaissance satellite under the supervision of the National Reconnaissance Office (NRO) which was launched in 1961. It was a KH-5 ARGON satellite, based on an Agena-B. It was the second KH-5 mission to be launched, and the second to end in failure.

Discoverer 24, also known as Corona 9018A, was an American area survey optical reconnaissance satellite which was launched in 1961 but failed to achieve orbit. It was a KH-5 Argon satellite, based on an Agena-B. It was the third KH-5 to be launched.

Discoverer 27, also known as Corona 9020A, was an American area survey optical reconnaissance satellite launched in 1961, but which failed to achieve orbit. It was a KH-5 Argon satellite, based on an Agena-B. It was the fourth KH-5 to be launched, the second consecutive KH-5 launch failure, and the fourth consecutive KH-5 mission failure.

FTV-1126, also known as Corona 9034A, was an American area survey optical reconnaissance satellite launched in 1962. It was a KH-5 Argon satellite, based on an Agena-B. It was also unofficially known as Discoverer 41, a continuation of the designation sequence used for previous US reconnaissance satellites, which had officially been discontinued after Discoverer 38. It was the first KH-5 satellite to complete its mission successfully.

FTV-1132, also known as the Corona 9042A, was an American area survey optical reconnaissance satellite which was launched in 1962. It was a KH-5 Argon satellite, based on an Agena-B. The satellite operated successfully, but its film capsule was lost during recovery due to a parachute failure.

<span class="mw-page-title-main">Discoverer 22</span> Reconnaissance satellite

Discoverer 22, also known as Corona 9015, was an American optical reconnaissance satellite which was lost in a launch failure in 1961. It was the fourth of ten Corona KH-2 satellites, based on the Agena-B.

<span class="mw-page-title-main">Discoverer 26</span> Reconnaissance satellite

Discoverer 26, also known as Corona 9019, was an American optical reconnaissance satellite which was launched in 1961. It was the sixth of ten Corona KH-2 satellites, based on the Agena-B.

<span class="mw-page-title-main">Discoverer 28</span> Reconnaissance satellite

Discoverer 28, also known as Corona 9021, was an American optical reconnaissance satellite which was lost in a launch failure in 1961. It was the seventh of ten Corona KH-2 satellites, based on the Agena-B.

<span class="mw-page-title-main">Discoverer 16</span> Reconnaissance satellite

Discoverer 16, also known as Corona 9011, was an American optical reconnaissance satellite which was lost in a launch failure on 26 October 1960. It was the first of ten Corona KH-2 satellites, based on the Agena-B.

<span class="mw-page-title-main">Discoverer 17</span> Reconnaissance satellite

Discoverer 17, also known as Corona 9012, was an American optical reconnaissance satellite launched on 12 November 1960 at 20:38:00 GMT. It was the second of ten Corona KH-2 satellites, based on the Agena-B.

Discoverer 29, also known as Corona 9023, was an American optical reconnaissance satellite which was launched in 1961. It was the first KH-3 Corona''' satellite, which was based on an Agena-B rocket.

<span class="mw-page-title-main">Discoverer 33</span> Reconnaissance satellite

Discoverer 33, also known as Corona 9026, was an American optical reconnaissance satellite which was lost in a launch failure in 1961. It was the eighth of ten Corona KH-2 satellites, based on the Agena-B.

<span class="mw-page-title-main">Discoverer 34</span> Reconnaissance satellite

DISCOVERE 34, also known as CORONA 9027, was a United States optical reconnaissance satellite which was launched on 5 November 1961. It was the ninth of ten CORONA KH-2 satellites, based on the Agena B.

Discoverer 37, also known as Corona 9030, was an American optical reconnaissance satellite which was lost in a launch failure in 1962. It was the last KH-3 Corona‴ satellite, which was based on an Agena-B rocket.

References

  1. Bindschadler, Robert; Seider, Wendy (1 November 1998). Declassified Intelligence Satellite Photography (DISP) Coverage of Antarctica (PDF). NASA/TM-1998-206879 (Report). NASA. Archived from the original (PDF) on 14 May 2010. Retrieved 26 September 2021.PD-icon.svg This article incorporates text from this source, which is in the public domain .
  2. "Discover 20". nasa.gov. Retrieved 26 September 2021.PD-icon.svg This article incorporates text from this source, which is in the public domain .