Discoverer 30, also known as Corona 9022, was an American optical reconnaissance satellite which was launched in 1961. It was a KH-3 Corona''' satellite, based on an Agena-B rocket.[1]
| Mission type | Optical reconnaissance |
|---|---|
| Operator | US Air Force/NRO |
| Harvard designation | 1961 Omega 1 |
| COSPAR ID | 1961-024A  |
| SATCAT no. | 00182 |
| Mission duration | 2 days |
| Spacecraft properties | |
| Spacecraft type | KH-3 Corona''' |
| Bus | Agena-B |
| Manufacturer | Lockheed |
| Launch mass | 1,150 kilograms (2,540 lb) |
| Start of mission | |
| Launch date | 12 September 1961, 19:59 (1961-09-12UTC19:59Z) UTC |
| Rocket | Thor DM-21 Agena-B 310 |
| Launch site | Vandenberg LC-75-3-5 |
| End of mission | |
| Decay date | 11 December 1961 (1961-12-12) |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth |
| Perigee altitude | 231 kilometers (144 mi) |
| Apogee altitude | 484 kilometers (301 mi) |
| Inclination | 82.6 degrees |
| Period | 91.7 minutes |
The launch of Discoverer 30 occurred at 19:59 UTC on 12 September 1961. A Thor DM-21 Agena-B rocket was used, flying from Launch Complex 75-3-5 at the Vandenberg Air Force Base.[2] Upon successfully reaching orbit, it was assigned the Harvard designation 1961 Omega 1.
Discoverer 30 was operated in a low Earth orbit, with a perigee of 231 kilometres (144 mi), an apogee of 484 kilometres (301 mi), 82.6 degrees of inclination, and a period of 91.7 minutes.[3] The satellite had a mass of 1,150 kilograms (2,540 lb),[4] and was equipped with a panoramic camera with a focal length of 61 centimetres (24 in), which had a maximum resolution of 7.6 metres (25 ft).[5] Images were recorded onto 70-millimeter (2.8 in) film, and returned in a Satellite Recovery Vehicle two days after launch; however, like the previous mission, all of the images returned were found to be out of focus.[4] The Satellite Recovery Vehicle used by Discoverer 30 was SRV-551. Once its images had been returned, Discoverer 30's mission was complete, and it remained in orbit until its decay on 11 December 1961.[3]
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