Wikipedia
GEO Imaging Satellite
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]
GISAT-1 spacecraft in the cleanroom before encapsulation. | |
| Manufacturer | |
|---|---|
| Country of origin | India |
| Operator | ISRO |
| Applications | Earth observation |
| Specifications | |
| Bus | I-2K [1] |
| Launch mass | 2268 kg [3][4] |
| Power | 2280 watts[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, 00:13 UTC[5][6][7][8] |
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 edit
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:
- 700 mm Ritchey–Chrétien telescope based on the design of Cartosat-2A
- Array detectors in Visible and Near-InfraRed (VNIR), and Short Wave-InfraRed (SWIR) bands
- Electronically steerable, phased array antenna
- High agility, jitter-free platform
| 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 |
Launch schedule edit
| 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] | 2280 watts | 12 August 2021, 00:13 UTC | 2268 kg | GSLV-F10 | SDSC | GTO | 85.5° East (planned) | [16][17][18][19][20][21][4][22][23][8] | |
| EOS-05 (GISAT-2) | TBD | TBD | 2280 watts | March 2024 (planned) | 2268 kg | GSLV | SDSC | GTO | [24][25][23][26] | |
See also edit
References edit
- ^ a b c d e "GSLV F10/GISAT-1 Brochure". Retrieved 26 February 2020.[permanent dead link]
- ^ "Gisat 1, 2 (Eos 03, 05)".
- ^ . Indian Space Research Organisation. December 2015. p. 35. Archived from the original on 5 July 2016.
- ^ a b "GSLV Planned launch". VSSC. Retrieved 22 December 2019.[permanent dead link]
- ^ "Launch of India's new-age Earth imaging satellite by May 15: K. Sivan". Retrieved 15 April 2021.
- ^ "ISRO revises launch schedule of GISAT-1 after "minor issue" with satellite". Retrieved 26 March 2021.
- ^ Chethan Kumar (9 April 2021). "Voltage issue further delays launch of Gisat-1". The Times of India. Retrieved 9 April 2021.
- ^ a b "ISRO plans to launch geo imaging satellite on August 12". The Hindu. PTI. 10 July 2021. ISSN 0971-751X. Retrieved 10 July 2021.
- ^ https://www.isro.gov.in/sites/default/files/flipping_book/annual_report_2019-20_english/files/assets/common/downloads/Annual%20Report%202019-20%20 [dead link]
- ^ Srivastava, Alok (3 January 2016). "User Interface Meet 2016: "New Indian eye in GEO"". nrsc.gov.in. (PDF) from the original on 30 August 2016. Retrieved 7 March 2021.
- ^ "Untitled Page".
- ^ a b K, Chethan (7 May 2022). "Navy to acquire Gisat-2; Dedicated satellite to boost capability in IOR region | India News - Times of India". The Times of India. Retrieved 7 May 2022.
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,
- ^ "Ministry of Defence, Demands for Grants (2022-23), Army, Navy, Air Force, Joint Staff, Military Engineer Services, Servicemen Contributory Health Scheme And Sainik Schools (Demand No. 20 and 21)" (PDF). March 2022. (PDF) from the original on 19 March 2022.
- ^ (PDF). Archived from the original (PDF) on 4 March 2021.
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.
- ^ "যান্ত্রিক ত্রুটি, পুরোপুরি সফল হল না উপগ্রহ 'GISAT-1'-এর উৎক্ষেপণ" (in Bengali). Zee News. Zee News. 12 August 2021. Retrieved 12 August 2021.
- ^ "অতিমারির অন্ধকার ফুঁড়ে ফের উৎক্ষেপণে নামছে ইসরো, বৃহস্পতিবার কক্ষপথে যাবে জিস্যাট-১" (in Bengali). Kolkata: anandabazar.com. Anandabazar. 10 August 2021. Retrieved 12 August 2021.
- ^ "भारत का सबसे ताकतवर टेलीस्कोप, अब PAK पर हर पल नजर" (in Hindi). Aaj Tak. 20 December 2019. Retrieved 20 December 2019.
- ^ "દર 30 મીનિટે આકાશમાંથી ભારતને મળશે એક તસવીર, ઈસરો રચવા જઈ રહ્યું છે નવો ઇતિહાસ" (in Gujarati). GSTV. 21 December 2019. Retrieved 22 December 2019.
- ^ "ఫిబ్రవరిలో జీఎస్ఎల్వీ ప్రయోగం". eenadu.net (in Telugu). EENADU. Retrieved 27 January 2020.
- ^ "इसरो जाकर सैटेलाइट लांचिग देखेंगी रांची की मृदुला". jagran.com (in Hindi). Retrieved 14 February 2020.
- ^ "Status report on the current and future satellite systems by ISRO". Retrieved 21 September 2019.
- ^ . isro.gov.in. ISRO. Archived from the original on 16 July 2021. Retrieved 4 March 2020.
- ^ a b (PDF). ISRO. Archived from the original (PDF) on 25 April 2021. Retrieved 6 March 2021.
- ^ "GSLV Project: Planned launches of GSLV". Retrieved 22 December 2019.[permanent dead link]
- ^ "HAL hands over 50th set of L-40 stage of GSLV-MKII to ISRO". zeenews.india.com. 28 February 2020. Retrieved 28 February 2020.
- ^ "ISRO report on highlights and issues in dataset and product generation". April 2023.
GISAT-2 is scheduled for launch in March 2024.