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ScatSat-1
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 | |
| Names | Scatterometer Satellite-1 |
|---|---|
| Mission type | Earth observation |
| Operator | ISRO SAAR |
| COSPAR ID | 2016-059H |
| SATCAT no. | 41790 |
| Website | www |
| Mission duration | Planned: 5 years Achieved: 4 years, 5 months and 1 day |
| Spacecraft properties | |
| Bus | IMS-2 |
| Manufacturer | Indian Space Research Organisation |
| Launch mass | 371 kg (818 lb) |
| Power | 750 watts |
| Start of mission | |
| Launch date | 26 September 2016, 03:42 UTC |
| Rocket | Polar Satellite Launch Vehicle, PSLV-C35 |
| Launch site | Satish Dhawan Space Centre. First Launch Pad (FLP) |
| Contractor | Indian Space Research Organisation |
| Entered service | 15 December 2016 |
| End of mission | |
| Last contact | 28 February 2021 |
| Orbital parameters | |
| Reference system | Geocentric orbit |
| Regime | Low Earth orbit |
| Perigee altitude | 724 km (450 mi) |
| Apogee altitude | 741 km (460 mi) |
| Inclination | 98.1° |
| Period | 99.2 minutes |
| Instruments | |
| OceanSat Scatterometer-2 (OSCAT-2) | |
ScatSat-1 (Scatterometer Satellite-1) was a satellite providing weather forecasting, cyclone prediction, and tracking services to India. It has been developed by ISRO Satellite Centre, Bangalore whereas its payload was developed by Space Applications Centre, Ahmedabad.[1] The satellite carries a Ku-band scatterometer similar to the Oceansat-2 which became dysfunctional after its life span of four-and-a-half years. India was dependent on NASA's ISS-RapidScat for prediction of cyclone forecasting and weather prediction.[2] The data generated by this mini-satellite are used by National Aeronautics and Space Administration (NASA), European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT) and National Oceanic and Atmospheric Administration (NOAA).
Instruments
[edit]The designated primary instrument of the satellite was a scatterometer (OSCAT) which was similar to the instrument launched with Oceansat-2. The satellite was built around a standard IMS-2 bus and the mass of the satellite was 371 kg (818 lb). The weight of the scatterometer was 110 kg (240 lb).[2] This satellite measured the wind speed and its direction over the ocean.
Development
[edit]Space Applications Centre (ASC) of ISRO was responsible for development of the instrument whereas ISRO Satellite Centre, Bangalore was responsible for the bus. ScatSat-1 was being built at 60% of the actual production cost and one-third of the actual predicted time.[3] It was built using leftover parts of other satellite missions.[4]
Launch
[edit]The satellite was launched on 26 September 2016, at 03:42 UTC, from the first launch pad (FLP) of Satish Dhawan Space Centre, Sriharikota (SHAR) and launched by the PSLV-C35 launch vehicle the first multi-burn technology used by ISRO.[5] The microsatellites Alsat-1B, AlSat-2B and BlackSky Pathfinder-1, and nanosatellites AlSat-1N, NLS-19, PISat and Pratham were launched along with ScatSat-1.[6] It has been the longest Polar Satellite Launch Vehicle (PSLV) mission until date.
ScatSat-1 data
[edit]ScatSat-1 data are made available to the public through via FTP from the Meteorological and Oceanographic Satellite Data Archive Center, an e-portal maintained by Space Application Centre, Indian Space Research Organisation (ISRO).
Near-real time level two ocean wind vectors on a 25 / 50 km (16 / 31 mi) swath grid, based on the backscatter measurements of the ScatSat-1 are available through the e-portal of EUMETSAT.
End of mission
[edit]Data services of ScatSat-1 were discontinued after an irrecoverable TWTA instrument failure occurred on 28 February 2021.[7][8][9]The spacecraft was decommissioned on 26 Sep 2024, exactly 8 years after its launch following electrical passivation. It wass de-orbited with 12 orbital manoeuvres.[10]
See also
[edit]
References
[edit]- ^ "Special Section: SCATSAT-1".
- ^ a b Nair, Avinash (27 May 2015). "To predict cyclone, ISRO to build advanced satellite". The Indian Express. Ahmedabad. Retrieved 8 February 2016.
- ^ Singh, Tanaya (6 February 2016). "New ISRO Satellite to Predict Cyclones Being Built at 60% the Actual Cost, in One Third of the Time". thebetterindia.com. Retrieved 8 February 2016.
- ^ "How ISRO is "recycling" to build a cost-effective satellite at 60% the cost and one-third the time". Firstpost. 5 February 2016. Retrieved 16 November 2017.
- ^ "ScatSat-1". Retrieved 8 February 2016.
- ^ "ScatSat-1 (Scatterometer Satellite-1)".
- ^ Thomas, JV (13 April 2021). "ISRO Report on Current Missions and Future Plans Presented to CGMS-49 Working Group III session".
Stopped operations on Feb. 28, 2021 due to redundant chain malfunction. Detailed analysis is ongoing.
- ^ Thapliyal, P. K. (23 April 2021). "ISRO highlights and issues in dataset and products Presented to CGMS-49 WG-II Session, Agenda 2".
Re-processing of Scatsat-1 data in v1.1.4 since June 20, 2019 completed (after Main chain TWTA failure) and data from Fairbanks station went into operational chain since August 2020. Anomaly observed in the on-board system of the redundant chain of Scatsat-1 since first week of March 2021. Analysis is being carried out.
- ^ "OSI SAF ScatSat-1 OSCAT Wind Products". scatterometer.knmi.nl. Archived from the original on 10 April 2022. Retrieved 10 April 2022.
All ScatSat-1 services are discontinued following an irrecoverable instrument failure on 28 February 2021.
- ^ "Indian Space Situational Assessment Report (ISSAR) for 2024 Released". www.isro.gov.in. Retrieved 31 May 2025.
External links
[edit]- Official website
- ScatSat-1 picture gallery Archived 31 October 2016 at the Wayback Machine
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