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 The P78-1 | |
| Mission type | Solar physics |
|---|---|
| Operator | DoD Space Test Program[1] |
| COSPAR ID | 1979-017A[2] |
| SATCAT no. | 11278[2] |
| Mission duration | 6 years, 6 months, 20 days |
| Spacecraft properties | |
| Manufacturer | Ball Aerospace |
| Launch mass | 1,331 kilograms (2,934 lb)[3] |
| Dry mass | 850 kilograms (1,870 lb) |
| Start of mission | |
| Launch date | February 24, 1979, 08:24:00 UTC[3] |
| Rocket | Atlas F |
| Launch site | Vandenberg, SLC-3W[3] |
| End of mission | |
| Disposal | Destroyed by ASAT |
| Destroyed | September 13, 1985 |
| Orbital parameters | |
| Reference system | Sun-synchronous[4] |
| Regime | Low Earth |
| Eccentricity | .0022038[5] |
| Perigee altitude | 515 kilometres (320 mi)[5] |
| Apogee altitude | 545 kilometres (339 mi)[5] |
| Inclination | 97.6346°[5] |
| RAAN | 182.5017[5] |
| Argument of perigee | 99.6346[5] |
| Mean anomaly | 260.9644[5] |
| Mean motion | 15.11755304[5] |
| Epoch | 1985 09 13.72413718[5] |
| Instruments | |
| Gamma-ray spectrometer, a white light spectrograph, an extreme ultraviolet spectrometer, a high latitude particle spectrometer, an aerosol monitor, and an X-ray monitor[4] | |
P78-1 or Solwind was a United States satellite launched aboard an Atlas F rocket from Vandenberg Air Force Base in California on February 24, 1979.[6] The satellite's mission was extended by several weeks, so that it operated until it was destroyed in orbit on September 13, 1985, to test the ASM-135 ASAT anti-satellite missile.
- ^ Krebs, Gunter. "Solwind (P78-1)". Gunter's Space Page. Retrieved March 20, 2014.
- ^ a b McDowell, Jonathan. "SATCAT". Jonathan's Space Pages. Retrieved March 20, 2014.
- ^ a b c "Solwind". Encyclopedia Astronautica. Archived from the original on June 24, 2014. Retrieved March 20, 2014.
- ^ a b "The P78-1 Satellite". NASA Goddard Space Flight Center. June 26, 2003. Archived from the original on October 1, 2006. Retrieved March 20, 2014.
- ^ a b c d e f g h i Cite error: The named reference
NASA 2008was invoked but never defined (see the help page). - ^ "Solwind (P78-1)". Gunter's Space Page. Retrieved 2024-10-08.