| 词条 | Vela 2A |
| 释义 |
| name = Vela 2A | image = Vela5b.jpg | image_alt = 180px | image_caption = Vela satellite. | mission_type = | operator = USAF | website = | COSPAR_ID = 1964-040A[1] | SATCAT = 836 | mission_duration = | spacecraft_bus = | manufacturer = TRW | dry_mass = | launch_mass = {{convert|150|kg|lb}} | power = 90 W | launch_date = {{start-date|July 17, 1964, 08:22|timezone=yes}} UTC | launch_rocket = Atlas LV-3A Agena-D | launch_site = Cape Canaveral LC-13 | launch_contractor = | entered_service = | disposal_type = | deactivated = | orbit_epoch = {{start-date|July 10, 2017}} | orbit_reference = Geocentric[2] | orbit_regime = Highly Elliptical | orbit_periapsis = {{convert|45,585|km|mi}} | orbit_apoapsis = {{convert|161,011|km|mi}} | orbit_inclination = 75.15° | orbit_semimajor = | orbit_eccentricity = 0.5262 | orbit_period = | apsis = gee | programme = Vela | previous_mission = Vela 1B | next_mission = Vela 2B }}Vela 2A, also known as Vela 3, Vela Hotel 3 and OPS 3662[3], was a U.S. military satellite developed to detect nuclear detonations to monitor compliance with the 1963 Partial Test Ban Treaty by the Soviet Union. The secondary task of the ship was space research (X-rays, gamma rays, neutrons, magnetic field and charged particles). It was released on July 17, 1964 from the Cape Canaveral Air Force Station, Florida, through an Atlas-Agena launch vehicle. Vela 2A was launched along with Vela 2B and with ERS 13.[4] Vela 2A was rotated stabilized (2 rotations per sec.). The ship could work in real time mode (one data frame per second) or in data recording mode (one frame every 256 seconds). The first mode was used for the first 40% of the mission's duration. The second one was used until the next pair of Vela satellites were launched. Instruments
See also
References1. ^{{cite web|url=https://nssdc.gsfc.nasa.gov/nmc/masterCatalog.do?sc=1964-040A|title=Vela 2A|last=NASA Goddard Space Flight Center|access-date=June 28, 2018}} {{PD-notice}} 2. ^{{cite web|url=http://www.n2yo.com/satellite/?s=836/|title=OPS 3662 (VELA 3)|work=N2YO.com|last=N2YO.com|access-date=June 28, 2018}} 3. ^{{cite web|url=http://www.lib.cas.cz/www/space.40/1964/040A.HTM|title=1964-040A - Vela 3|work=Space 40|last=Antonín Vítek|access-date=June 28, 2018}} 4. ^{{cite web|url=http://www.astronautix.com/v/vela.html|title=Vela|work=Astronautix|first=Mark|last=Wade|access-date=June 28, 2018}} External links
3 : 1964 in spaceflight|Military space program of the United States|Derelict satellites orbiting Earth |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。