| Vela 1B | |||||||
| Operator: | USAF | ||||||
| Cospar Id: | 1963-039C | ||||||
| Satcat: | 00692 | ||||||
| Mission Duration: | 6 months (planned) | ||||||
| Manufacturer: | TRW | ||||||
| Launch Mass: | 150kg (330lb) | ||||||
| Power: | 90 W | ||||||
| Launch Rocket: | Atlas-LV3 Agena-D | ||||||
| Launch Site: | Cape Canaveral LC-13 | ||||||
| Orbit Reference: | Geocentric[1] | ||||||
| Orbit Regime: | Highly Elliptical | ||||||
| Orbit Periapsis: | 42766km (26,574miles) | ||||||
| Orbit Apoapsis: | 175984.2km (109,351.5miles) | ||||||
| Orbit Inclination: | 28.7° | ||||||
| Orbit Semimajor: | 115746km (71,921miles) | ||||||
| Orbit Period: | 6,531.6 minutes | ||||||
| Apsis: | gee | ||||||
| Instruments List: |
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| Programme: | Vela | ||||||
| Previous Mission: | Vela 1A | ||||||
| Next Mission: | Vela 2A | ||||||
Vela 1B was a military satellite developed to detect nuclear detonations to monitor compliance with the 1963 Partial Test Ban Treaty by the Soviet Union.
Vela 1B was launched on October 17, 1963, from the Cape Canaveral Air Force Station, Florida, by an Atlas-Agena launch vehicle. Vela 1B was launched along with Vela 1A and with ERS-12.[2]
Vela 1B was one of two spin-stabilized satellites comprising the first launch in a series of 6 Vela launches. Their objectives were to monitor nuclear weapons explosions in space and to study X-rays, gamma-rays, neutrons, and charged particles as the satellites passed through interplanetary space, the bow shock, the magnetosheath, and the magnetotail. The satellite operated in either a real-time mode (one data frame/sec) or a memory store mode (one data frame every 256 seconds). The spacecraft was operated in the real-time mode about 40% of the time and in the store mode for the rest of the time until the next Vela launch. At this time, tracking priority was given to the new spacecraft, and the older spacecraft was operated in the store mode only. There had been less and less data coverage of these satellites with each succeeding launch.[3]