GEO Imaging Satellite

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Geo Imaging Satellite
GISAT-1 spacecraft in the cleanroom before encapsulation.jpg
GISAT-1 spacecraft in the cleanroom before encapsulation.
Manufacturer
Country of origin India
Operator ISRO
Applications Earth observation
Specifications
Bus I-2K [1]
Launch mass2268 kg [2] [3]
Power2280 watts [1]
Equipment Ritchey-Chrétien telescope [4]
Multispectral array detectors
Steerable antenna
Regime Geostationary orbit
Design life7 years (planned)
Production
StatusPlanned
Launched1
Operational0
Failed1
Lost0
Maiden launch12 August 2021, 00:13 UTC [5] [6] [7] [8]

Geo Imaging Satellite or GISAT is an Indian imaging satellite class for geostationary orbit with a high temporal resolution, meant for providing near real time imaging with fast revisit capability and real time monitoring. [9] Two satellites will provide resolution in the range of 42 to 318 m. [1] [10] It will carry multi-spectral (Visible and Near-InfraRed, and Short Wave-InfraRed), multi-resolution (42 to 318 m) imaging instruments. [11]

Contents

The first satellite; EOS-3 (aka GISAT-1) was launched on 12 August 2021 but failed to reach orbit as cryogenic upper stage of GSLV could not ignite. EOS-3 was supposed to fulfil civilian applications. [12]

The second satellite, EOS-5 (aka GISAT-2) will be acquired by Indian Navy and will differ slightly in capabilities compared to EOS-03 (aka GISAT-1). [13] [12] [14]

Payload

The GISAT-1 in deployed configuration. I-2K based GISAT-1 spacecraft in deployed configuration..png
The GISAT-1 in deployed configuration.

GISATs will image in multi-spectral and hyper-spectral bands to provide near real-time pictures of large areas of the country, under cloud-free conditions, at frequent intervals which is, selected field image in every 5 minutes and entire Indian landmass image every 30 minutes at 42 m spatial resolution. [1]

Features of GISAT-1 are:

Imaging capabilities of GISAT-1 [1]
BandChannelsGround Resolution(m)Range(μm)
Multispectral (VNIR)6420.45 – 0.875
Hyperspectral (VNIR)1583180.375 – 1.0
Hyperspectral (SWIR)2561910.9 – 2.5

Launch schedule

Designation COSPAR ID NORAD ID PowerLaunchOrbital parametersRemarks
Launch date, Time (UTC)Launch massLaunch vehicleLaunch siteOrbitLongitude
EOS-03
(GISAT-1)
Failed to orbit [15] 2280 watts 12 August 2021,
00:13 UTC
2268 kg GSLV-F10 SDSC GTO 85.5° East (planned) [16] [17] [18] [19] [20] [21] [3] [22] [23] [8]
EOS-05
(GISAT-2)
TBDTBD2280 watts2024 (planned)2268 kg GSLV SDSC GTO [24] [25] [23] [26]

See also

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References

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