Names | Spaceborne multiband astronomical Variable Objects Monitor mission | ||||||||||
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Mission type | Gamma-ray burst observatory[1] | ||||||||||
Operator | CNES / CNSA | ||||||||||
COSPAR ID | 2024-116A | ||||||||||
SATCAT no. | 60088 | ||||||||||
Website | http://www.svom.fr/en/ | ||||||||||
Mission duration | 3 years (planned) | ||||||||||
Spacecraft properties | |||||||||||
Spacecraft | SVOM | ||||||||||
Launch mass | 950 kg (2,090 lb) | ||||||||||
Dimensions | 2.5 × 2.8 m (8 ft 2 in × 9 ft 2 in) | ||||||||||
Power | 800 watts | ||||||||||
Start of mission | |||||||||||
Launch date | 22 June 2024 (07:00:00 UTC)[2][3] | ||||||||||
Rocket | Long March 2C[4] | ||||||||||
Launch site | Xichang Satellite Launch Center | ||||||||||
Contractor | China Aerospace Science and Technology Corporation (CASC) | ||||||||||
Orbital parameters | |||||||||||
Reference system | Geocentric orbit | ||||||||||
Regime | Low Earth orbit | ||||||||||
Perigee altitude | 625 km (388 mi) | ||||||||||
Apogee altitude | 625 km (388 mi) | ||||||||||
Inclination | 30° | ||||||||||
Period | 90.0 minutes | ||||||||||
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The Space Variable Objects Monitor (SVOM) is a small X-ray telescope satellite developed by China National Space Administration (CNSA), Chinese Academy of Sciences (CAS) and the French Space Agency (CNES),[5] launched on 22 June 2024 (07:00:00 UTC).[2]
SVOM will study the explosions of massive stars by analysing the resulting gamma-ray bursts. The light-weight X-ray mirror for SVOM weighs just 1 kg (2.2 lb).[5] SVOM will add new capabilities to the work of finding gamma-ray bursts currently being done by the multinational satellite Swift Gamma-Ray Burst Mission.[5] Its anti-solar pointing strategy makes the Earth cross the field of view of its payload every orbit.[6]
Using synergy between space and ground instruments, the mission has these scientific objectives:[7]
The selected orbit is circular with an altitude of 600 km (370 mi) and an inclination angle of 30° with a precession period of 60 days.[8] The payload is composed of the following four main instruments:[8][9]
The ground segment includes a set of three ground-based dedicated instruments – two robotic Ground Follow-up Telescopes (GFT) and an optical monitor, Ground Wide Angle Camera (GWAC) – which will complement the space borne instruments. A large fraction of GRB will have redshift determinations, an observing strategy optimized to facilitate follow-up observations by large ground-based spectroscopic telescopes.
A key elements of the SVOM mission are the Ground Wide Angle Cameras (GWACs) and the Ground Follow-up Telescopes (GFTs).[14][15]
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Earth observation |
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Communication and engineering |
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Data relay satellite system |
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Satellite navigation system |
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Astronomical observation |
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Lunar exploration |
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Planetary exploration |
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Microsatellites |
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Future spacecraft in italics. |