 GISAT-1 spacecraft in thecleanroom before encapsulation. | |
| Manufacturer | |
|---|---|
| Country of origin | India |
| Operator | ISRO |
| Applications | Earth observation |
| Specifications | |
| Bus | I-2K[1] |
| Launch mass | 2268 kg[3][4] |
| Power | 2280watts[1] |
| Equipment | Ritchey-Chrétien telescope[2] Multispectral array detectors Steerable antenna |
| Regime | Geostationary orbit |
| Design life | 7 years (planned) |
| Production | |
| Status | Planned |
| Launched | 1 |
| Operational | 0 |
| Failed | 1 |
| Lost | 0 |
| Maiden launch | 12 August 2021, 00:13UTC[5][6][7][8] |
Geo Imaging Satellite orGISAT is an Indian imaging satellite class forgeostationary 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]
The first satellite; EOS-3 (aka GISAT-1) was launched on 12 August 2021 but failed to reach orbit ascryogenic upper stage ofGSLV could not ignite. EOS-3 was supposed to fulfil civilian applications.[12]
The second satellite, EOS-5 (aka GISAT-2) will be acquired byIndian Navy and will differ slightly in capabilities compared to EOS-03 (aka GISAT-1).[13][12][14]
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:
| Band | Channels | Ground Resolution(m) | Range(μm) |
|---|---|---|---|
| Multispectral (VNIR) | 6 | 42 | 0.45 – 0.875 |
| Hyperspectral (VNIR) | 158 | 318 | 0.375 – 1.0 |
| Hyperspectral (SWIR) | 256 | 191 | 0.9 – 2.5 |
| Designation | COSPAR ID | NORAD ID | Power | Launch | Orbital parameters | Remarks | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Launch date, Time (UTC) | Launch mass | Launch vehicle | Launch site | Orbit | Longitude | |||||
| EOS-03 (GISAT-1) | Failed to orbit[15] | 2280watts | 12 August 2021, 00:13UTC | 2268 kg | GSLV-F10 | SDSC | GTO | 85.5° East (planned) | [16][17][18][19][20][21][4][22][23][8] | |
| EOS-05 (GISAT-1A) | TBD | TBD | 2280 watts | Q1 2026 (planned) | 2268 kg | GSLV-F18 | SDSC | GTO | [24][25][23][26] | |
| GISAT-2 | TBD | TBD | 2280 watts | 2027 (planned) | 2268 kg | SDSC | GTO | [27][28][23][29] | ||
The first one (Gisat-1) was for civilian use, but Gisat-2 is for strategic purposes and the navy has very specific requirements which they (Isro) need to meet,
GISAT Series: Geo Imaging Satellite is envisaged to provide high resolution imaging capability from geostationary orbit. It will consist of high-resolution imaging in VNIR (GISAT-1/-2) and LWIR (GISAT-2). There will be two hyperspectral imagers covering VNIR and SWIR regions. GISAT-1 payload was successfully delivered to the project.
GISAT-2 is scheduled for launch in March 2024.
GISAT-2 is scheduled for launch in March 2024.
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