 OV3 satellites schematic | |
| Mission type | Earth science |
|---|---|
| Operator | USAF |
| COSPAR ID | 1966-052A |
| SATCAT no. | S02201 |
| Spacecraft properties | |
| Manufacturer | Space General |
| Launch mass | 77 kg (170 lb) |
| Start of mission | |
| Launch date | 10 June 1966 04:15:00 UTC |
| Rocket | Scout B |
| Launch site | Wallops Flight Facility Launch Area 3A[1] |
| Orbital parameters | |
| Regime | Medium Earth Orbit |
| Eccentricity | 0.22423 |
| Perigee altitude | 647.00 km (402.03 mi) |
| Apogee altitude | 4,711.00 km (2,927.28 mi) |
| Inclination | 40.900° |
| Period | 143 minutes [2] |
| Epoch | 10 June 1966 04:19:00 |
Orbiting Vehicle 3-4 (also known as OV3-4, PHASR,[1] and OPS 1427[3]), launched 10 June 1966, was the second satellite to be launched in the OV3 series of the United States Air Force's Orbiting Vehicle program. The satellite measured radiation above the Earth, helping to determine the hazard posed to human spaceflight at typically traveled altitudes. OV3-4 is still in orbit as of 6 June 2021.
- ^ a b McDowell, Jonathan. "Launch Log". Jonathan's Space Report. Retrieved 7 June 2021.
- ^ "OV3-4". NASA. Retrieved 7 June 2021.
- ^ "OPS 1427 (OV3-4)". Retrieved 7 June 2021.