ScatSat-1 - Revision history

TrinaAshby9096: improve layout after review and updated info after review

2026-03-28T13:47:07Z

improve layout after review and updated info after review

← Older revision		Revision as of 19:17, 28 March 2026
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	\| name = ScatSat-1		\| name = ScatSat-1
	\| names_list = Scatterometer Satellite-1		\| names_list = Scatterometer Satellite-1
	\| image =		\| image = PSLV-C35, SCATSAT-1 - Spacecraft ScatSat-1 in clean-room 01.jpg
	\| image_caption =		\| image_caption =
	\| image_size = 300px		\| image_size = 300px
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	== End of mission ==		== End of mission ==
	Data services of ScatSat-1 were discontinued after an irrecoverable [[Traveling-wave tube\|TWTA]] instrument failure occurred on 28 February 2021.<ref>{{Cite web \|last=Thomas \|first=JV \|date=13 April 2021 \|title=ISRO Report on Current Missions and Future Plans Presented to CGMS-49 Working Group III session \|url=https://www.cgms-info.org/Agendas/GetWpFile.ashx?wid=629992fb-9647-4a54-913e-56efc5e5e3c7&aid=09cc6528-8c24-462a-84a9-80a477555fa1 ~~\|url-status=live~~ \|quote=Stopped operations on Feb. 28, 2021 due to redundant chain malfunction. Detailed analysis is ongoing.}}</ref><ref>{{Cite web \|last=Thapliyal \|first=P. K. \|date=23 April 2021 \|title=ISRO highlights and issues in dataset and products Presented to CGMS-49 WG-II Session, Agenda 2 \|url=https://www.cgms-info.org/Agendas/GetWpFile.ashx?wid=515ce2d9-8856-439f-8f37-d8139492a064&aid=d448bfb3-0c43-4543-a999-11486876ed20 \|quote=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.}}</ref><ref>{{Cite web \|title=OSI SAF ScatSat-1 OSCAT Wind Products \|url=https://scatterometer.knmi.nl/scasa_25_prod/ \|archive-url=https://web.archive.org/web/20220410133430/https://scatterometer.knmi.nl/scasa_25_prod/ \|archive-date=10 April 2022 \|access-date=2022-04-10 \|website=scatterometer.knmi.nl \|quote=All ScatSat-1 services are discontinued following an irrecoverable instrument failure on 28 February 2021.}}</ref>		Data services of ScatSat-1 were discontinued after an irrecoverable [[Traveling-wave tube\|TWTA]] instrument failure occurred on 28 February 2021.<ref>{{Cite web \|last=Thomas \|first=JV \|date=13 April 2021 \|title=ISRO Report on Current Missions and Future Plans Presented to CGMS-49 Working Group III session \|url=https://www.cgms-info.org/Agendas/GetWpFile.ashx?wid=629992fb-9647-4a54-913e-56efc5e5e3c7&aid=09cc6528-8c24-462a-84a9-80a477555fa1 \|quote=Stopped operations on Feb. 28, 2021 due to redundant chain malfunction. Detailed analysis is ongoing.}}</ref><ref>{{Cite web \|last=Thapliyal \|first=P. K. \|date=23 April 2021 \|title=ISRO highlights and issues in dataset and products Presented to CGMS-49 WG-II Session, Agenda 2 \|url=https://www.cgms-info.org/Agendas/GetWpFile.ashx?wid=515ce2d9-8856-439f-8f37-d8139492a064&aid=d448bfb3-0c43-4543-a999-11486876ed20 \|quote=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.}}</ref><ref>{{Cite web \|title=OSI SAF ScatSat-1 OSCAT Wind Products \|url=https://scatterometer.knmi.nl/scasa_25_prod/ \|archive-url=https://web.archive.org/web/20220410133430/https://scatterometer.knmi.nl/scasa_25_prod/ \|archive-date=10 April 2022 \|access-date=2022-04-10 \|website=scatterometer.knmi.nl \|quote=All ScatSat-1 services are discontinued following an irrecoverable instrument failure on 28 February 2021.}}</ref> The spacecraft was decommissioned on 26 Sep 2024, exactly 8 years after its launch following electrical passivation. It was [[Atmospheric entry\|de-orbited]] with 12 orbital manoeuvres.<ref>{{Cite web \|title=Indian Space Situational Assessment Report (ISSAR) for 2024 Released \|url=https://www.isro.gov.in/ISSAR_2024.html \|access-date=2025-05-31 \|website=www.isro.gov.in}}</ref>

	== See also ==		== See also ==
			{{Portal\|Spaceflight}}
	* [[QuikSCAT]]		* [[QuikSCAT]]
	* [[Oceansat-1]]		* [[Oceansat-1]]
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	== External links ==		== External links ==
	* {{Official website\|http://www.isro.gov.in/Spacecraft/ ScatSat-1}}		* {{Official website\|http://www.isro.gov.in/Spacecraft/ ScatSat-1}}
	* [http://mosdac.gov.in/data/scatviewer.jsp ScatSat-1 picture gallery]		* [http://mosdac.gov.in/data/scatviewer.jsp ScatSat-1 picture gallery] {{Webarchive\|url=https://web.archive.org/web/20161031213014/http://mosdac.gov.in/data/scatviewer.jsp \|date=31 October 2016 }}

	{{Indian space programme}}		{{Indian space programme}}
	{{Indian spacecraft}}		{{Indian spacecraft}}
			{{Orbital launches in 2016}}

	[[Category:Spacecraft launched by India in 2016]]		[[Category:Spacecraft launched by India in 2016]]

Ajay Kumar: Created a new article

2023-09-03T08:51:39Z

Created a new article

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{{Short description|Indian Earth observation satellite}}
{{Use British English|date=May 2021}}
{{Use dmy dates|date=May 2021}}
{{Infobox spaceflight
| name = ScatSat-1
| names_list = Scatterometer Satellite-1
| image =
| image_caption =
| image_size = 300px
| mission_type = [[Earth observation satellite|Earth observation]]
| operator = [[Indian Space Research Organisation|ISRO]]
| COSPAR_ID = 2016-059H
| SATCAT = 41790
| website = {{url|https://www.isro.gov.in}}
| mission_duration = Planned: 5 years <br />Achieved: {{time interval|26 September 2016 03:42|28 February 2021|show=ymd}}
| spacecraft =
| spacecraft_type =
| spacecraft_bus = [[Indian Mini Satellite bus|IMS-2]]
| manufacturer = [[Indian Space Research Organisation]]
| launch_mass = {{cvt|371|kg}}
| dry_mass =
| dimensions =
| power = 750 [[watt]]s
| launch_date = 26 September 2016, 03:42 [[Coordinated Universal Time|UTC]]
| launch_rocket = [[Polar Satellite Launch Vehicle]], [[PSLV-C35]]
| launch_site = [[Satish Dhawan Space Centre]]. [[Satish Dhawan Space Centre|First Launch Pad (FLP)]]
| launch_contractor = [[Indian Space Research Organisation]]
| entered_service = 15 December 2016
| disposal_type =
| deactivated =
| last_contact = 28 February 2021
| orbit_reference = [[Geocentric orbit]]
| orbit_regime = [[Low Earth orbit]]
| orbit_periapsis = {{cvt|724|km}}
| orbit_apoapsis = {{cvt|741|km}}
| orbit_inclination = 98.1°
| orbit_period = 99.2 minutes
| apsis = gee
| instruments = OceanSat Scatterometer-2 (OSCAT-2)
| programme = [[Earth observation satellite|Earth observation satellites series]]
| previous_mission = [[Cartosat-2C]]
| next_mission = [[Resourcesat-2A]]
}}

'''ScatSat-1''' (Scatterometer Satellite-1) was a satellite providing [[weather forecasting]], [[Cyclone|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]].<ref>{{cite web|url=https://www.currentscience.ac.in/php/feat.php?feature=Special%20Section:%20SCATSAT-1&featid=10116|title=Special Section: SCATSAT-1}}</ref> The satellite carries a [[Ku band|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.<ref name="cyclone">{{cite news
|url=http://indianexpress.com/article/technology/science/isro-building-cyclone-predicting-mini-satellite-at-sac/|title=To predict cyclone, ISRO to build advanced satellite|newspaper=The Indian Express
|date=May 27, 2015|access-date=February 8, 2016|author=Nair, Avinash|location=Ahmedabad}}</ref> 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 ==
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 [[Indian Mini Satellite bus|IMS-2]] bus and the mass of the satellite was {{cvt|371|kg}}. The weight of the scatterometer was {{cvt|110|kg}}.<ref name="cyclone"/> This satellite measured the wind speed and its direction over the ocean.

== Development ==
[[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.<ref name="better">{{cite web|url=http://www.thebetterindia.com/45195/isro-scatsat-to-predict-cyclones/|title=New ISRO Satellite to Predict Cyclones Being Built at 60% the Actual Cost, in One Third of the Time|publisher=thebetterindia.com|date=February 6, 2016|access-date=February 8, 2016|author=Singh, Tanaya}}</ref> It was built using leftover parts of other satellite missions.<ref>{{cite news|title=How ISRO is "recycling" to build a cost-effective satellite at 60% the cost and one-third the time|url=http://www.firstpost.com/india/how-isro-is-recycling-to-build-a-cost-effective-satellite-at-60-the-cost-and-one-third-the-time-2613750.html|access-date=16 November 2017|publisher=Firstpost|date=5 February 2016}}</ref>

== Launch ==
The satellite was launched on 26 September 2016, at 03:42 [[Coordinated Universal Time|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.<ref name="scatsat">{{cite web|url=http://space.skyrocket.de/doc_sdat/scatsat-1.htm|title=ScatSat-1|access-date=February 8, 2016}}</ref> The [[Small satellite|microsatellites]] [[Alsat-1B]], [[AlSat-2B]] and [[BlackSky Pathfinder-1]], and [[Small satellite|nanosatellites]] AlSat-1N, NLS-19, [[PISat]] and [[Pratham]] were launched along with ScatSat-1.<ref name="c35">{{cite web|url=https://directory.eoportal.org/web/eoportal/satellite-missions/s/scatsat-1/|title=ScatSat-1 (Scatterometer Satellite-1)}}</ref> It has been the longest [[Polar Satellite Launch Vehicle]] (PSLV) mission until date.

== ScatSat-1 data ==
ScatSat-1 data are made available to the public through via [[File Transfer Protocol|FTP]] from the [[MOSDAC|Meteorological and Oceanographic Satellite Data Archive Center]], an e-portal maintained by [[Space Applications Centre|Space Application Centre]], [[Indian Space Research Organisation]] (ISRO).

Near-real time level two ocean wind vectors on a {{cvt|25|/|50|km}} swath grid, based on the backscatter measurements of the ScatSat-1 are available through the e-portal of [[European Organisation for the Exploitation of Meteorological Satellites|EUMETSAT]].

== End of mission ==
Data services of ScatSat-1 were discontinued after an irrecoverable [[Traveling-wave tube|TWTA]] instrument failure occurred on 28 February 2021.<ref>{{Cite web |last=Thomas |first=JV |date=13 April 2021 |title=ISRO Report on Current Missions and Future Plans Presented to CGMS-49 Working Group III session |url=https://www.cgms-info.org/Agendas/GetWpFile.ashx?wid=629992fb-9647-4a54-913e-56efc5e5e3c7&aid=09cc6528-8c24-462a-84a9-80a477555fa1 |url-status=live |quote=Stopped operations on Feb. 28, 2021 due to redundant chain malfunction. Detailed analysis is ongoing.}}</ref><ref>{{Cite web |last=Thapliyal |first=P. K. |date=23 April 2021 |title=ISRO highlights and issues in dataset and products Presented to CGMS-49 WG-II Session, Agenda 2 |url=https://www.cgms-info.org/Agendas/GetWpFile.ashx?wid=515ce2d9-8856-439f-8f37-d8139492a064&aid=d448bfb3-0c43-4543-a999-11486876ed20 |quote=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.}}</ref><ref>{{Cite web |title=OSI SAF ScatSat-1 OSCAT Wind Products |url=https://scatterometer.knmi.nl/scasa_25_prod/ |archive-url=https://web.archive.org/web/20220410133430/https://scatterometer.knmi.nl/scasa_25_prod/ |archive-date=10 April 2022 |access-date=2022-04-10 |website=scatterometer.knmi.nl |quote=All ScatSat-1 services are discontinued following an irrecoverable instrument failure on 28 February 2021.}}</ref>

== See also ==

* [[QuikSCAT]]
* [[Oceansat-1]]
* [[Oceansat-2]]

== References ==
{{reflist}}

== External links ==
* {{Official website|http://www.isro.gov.in/Spacecraft/ ScatSat-1}}
* [http://mosdac.gov.in/data/scatviewer.jsp ScatSat-1 picture gallery]

{{Indian space programme}}
{{Indian spacecraft}}

[[Category:Spacecraft launched by India in 2016]]
[[Category:Mini satellites of India]]
[[Category:Weather satellites]]
[[Category:Spacecraft launched by PSLV rockets]]
[[Category:Earth observation satellites of India]]
[[Category:Oceanographic satellites]]
[[Category:Spacecraft decommissioned in 2021]]