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From Wikipedia, the free encyclopedia

FTV-2203
Mission typeReconnaissance
OperatorUS Air Force
Harvard designation1961 Alpha Lambda 1
COSPAR ID1961-035A
SATCAT no.00218Edit this on Wikidata
Mission duration15-30 days (planned)
Spacecraft properties
Spacecraft typeSamos-E5
Start of mission
Launch date22 December 1961, 19:12:33 (1961-12-22UTC19:12:33Z) UTC
RocketAtlas LV-3A Agena-B 114D
Launch sitePoint Arguello LC-1-2
End of mission
DisposalFailed deorbit
DeactivatedDecember 1961 (1962-01)
Decay date31 December 1961
Orbital parameters
Reference systemGeocentric
RegimeLow Earth
Eccentricity0.0334
Perigee altitude244 kilometers (152 mi)
Apogee altitude702 kilometers (436 mi)
Inclination89.2 degrees
Period94.5 minutes
Epoch22 December 1961, 14:12:00 UTC[1]
 

FTV-2203, also known as Samos 5, was an American reconnaissance satellite launched in 1961 as part of the Samos programme.[2] It was a film return reconnaissance spacecraft, meaning that it returned images in a film capsule at the end of its mission. FTV-2203 was a Samos-E5 spacecraft, based on the Agena-B. It carried a camera with a focal length of 1.67 metres (5 ft 6 in) and a resolution of 1.5 metres (4 ft 11 in).[3]

The launch

The launch of FTV-2203 occurred at 19:12:33 UTC on 22 December 1961. An Atlas LV-3A Agena-B rocket was used, flying from Launch Complex 1-2 at the Point Arguello Naval Air Station.[4] During the launch, the first stage sustainer engine failed to shut down on time, and instead burned until all of its oxidiser had been depleted. As a result, the spacecraft reached a higher orbit than had been planned.[5] It was assigned the Harvard designation 1961 Alpha Lambda 1.

Following launch, FTV-2203 was in a low Earth orbit with an apogee of 650 kilometres (400 mi), a perigee of 230 kilometres (140 mi), and 89.6 degrees of inclination. Within a few days of launch, it was commanded to deorbit in order to return its film capsule. This was conducted, however due to the additional altitude provided by the anomaly during launch, it was unable to fully deorbit.[5] The burn lowered its orbit, and it reentered the atmosphere on 31 December 1961. The film capsule, which had separated following the attempted deorbit burn, decayed on 9 January 1962.[6] The satellite had a mass of 2,580 kilograms (5,690 lb),[5] and measured 10.21 metres (33.5 ft) in length, with a diameter of 1.52 metres (5 ft 0 in).[7]

References

  1. ^ "NASA - NSSDCA - Spacecraft - Trajectory Details". nssdc.gsfc.nasa.gov. Retrieved 2018-05-01.
  2. ^ Wade, Mark. "Samos". Encyclopedia Astronautica. Archived from the original on 16 January 2010. Retrieved 17 June 2010.
  3. ^ Krebs, Gunter. "Samos E-1". Gunter's Space Page. Retrieved 17 June 2010.
  4. ^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 17 June 2010.
  5. ^ a b c McDowell, Jonathan. "Samos 5". The History of Spaceflight. Jonathan's Space Page. Retrieved 17 June 2010.
  6. ^ McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 17 June 2010.
  7. ^ "Sentry/Samos-B". FAS. Retrieved 17 June 2010.
This page was last edited on 24 June 2020, at 08:08
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