RISAT-1A - Revision history

CleanupBot II: Removed empty portal template using script

2023-08-14T14:57:37Z

Removed empty portal template using script

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ClairBoone: updated details

2022-02-22T11:57:09Z

updated details

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->Ohsin at 18:07, 16 December 2021

2021-12-16T18:07:18Z

New page

{{Short description|Indian radar imaging satellite}}
{{Use British English|date=May 2021}}
{{Use dmy dates|date=May 2021}}
{{Infobox spaceflight
| name = RISAT-1A
| names_list = Radar Imaging Satellite-1A<br/>Earth Observation Satellite-4
| image =
| image_caption =
| image_size = 300px

| mission_type = [[Imaging radar]]
| operator = [[Indian Space Research Organisation|ISRO]]
| COSPAR_ID =
| SATCAT =
| website = {{url|https://www.isro.gov.in}}
| mission_duration = 5 years (planned)

| spacecraft = RISAT-1A
| spacecraft_type =
| spacecraft_bus =
| manufacturer = [[Indian Space Research Organisation]]
| launch_mass = {{cvt|1858|kg}}
| dry_mass =
| dimensions =
| power = 1850 [[watt]]s

| launch_date = NET 6 January 2022(Expected)
| launch_rocket = [[Polar Satellite Launch Vehicle]], [[PSLV-C52]]
| launch_site = [[Satish Dhawan Space Centre]], [[Satish Dhawan Space Centre|First Launch Pad (FLP)]]
| launch_contractor = [[Indian Space Research Organisation]]

| entered_service =
| disposal_type =
| deactivated =
| last_contact =

| orbit_reference = [[Geocentric orbit]]<ref name=UIM2016/>
| orbit_regime = [[Sun-synchronous orbit]]
| orbit_periapsis = {{cvt|536|km}}
| orbit_apoapsis = {{cvt|536|km}}
| orbit_inclination = 97.84°
| orbit_period = 96.50 minutes
| apsis = gee

| instruments = [[Synthetic-aperture radar|Synthetic Aperture Radar]] ([[X band|X-band]]) (SAR-X)

| programme = [[Earth observation satellite|Earth observation satellites series]]
| previous_mission = [[EOS-01|RISAT-2BR2 (EOS-01)]]
| next_mission =
}}

'''Radar Imaging Satellite-1A''', or '''RISAT-1A''', is a planned [[remote sensing]] satellite as a follow on to [[RISAT-1]] and with similar configuration. The satellite is being developed by [[Indian Space Research Organisation]] (ISRO) and it will be 6th in series of [[RISAT]] satellites. It will be a land based mission with primary application in terrain mapping and analysis of land, ocean and water surface for soil moisture.<ref name="ceos_1">{{cite web|url=http://ceos-sysdb.com/CEOS/db/db_instrument_low_level.php?id=790|title=CEOS Instrument: Synthetic Aperature Radiometer (RISAT)|access-date=February 9, 2016}}</ref>

== Satellite description ==
Synthetic aperture radar can be used for [[Earth observation satellite|Earth observation]] irrespective of the light and weather conditions of the area being imaged.<ref name="hindu-risat1radar">{{cite news |url=http://www.thehindu.com/sci-tech/technology/article3350204.ece|title=RISAT-1's radar can see through clouds and work in darkness|newspaper=The Hindu|date=25 April 2012|location=Chennai, India|first=N. Gopal|last=Raj}}</ref> The satellite will carry a [[C band (IEEE)|C-band]] [[synthetic-aperture radar]] (SAR) and will have a liftoff mass of {{cvt|1858|kg}}.<ref name=UIM2016>{{cite web|last=Reddy|first=O.V. Raghav|date=3 February 2016|title=Future Earth Observation Missions of ISRO, NRSC User Interaction Meet 2016|url=http://nrsc.gov.in/sites/all/pdf/modnrscUIM%20_Raghava%20Reddy_1.pdf|url-status=dead|archive-url=https://web.archive.org/web/20170203144958/http://nrsc.gov.in/sites/all/pdf/modnrscUIM%20_Raghava%20Reddy_1.pdf|archive-date=3 February 2017}}</ref>

'''Payload metrics are defined by the following parameters and areas of study:'''

{| class="wikitable" style="margin: 1em auto 1em auto; text-align:left;"
|-
! Category
! Parameters
|-
| rowspan="4"| Land
| Albedo and reflectance
|-
| Soil moisture
|-
| Vegetation
|-
| Multi-purpose imagery
|-
| Ocean
| Ocean topography/currents
|-
| rowspan="3"| Snow & Ice
| Ice sheet topography
|-
| Snow cover, edge and depth
|-
| Sea ice cover, edge and thickness
|}

== Launch ==
RISAT-1A will be launched on the [[Polar Satellite Launch Vehicle]] (PSLV-C52). RISAT-1A is planned to be launched NET 6 January 2022.<ref>{{cite web|title=SDSC-SHAR Website |url=https://www.shar.gov.in/sdscshar/index.jsp|archive-url=https://web.archive.org/web/20210716091221/https://www.shar.gov.in/sdscshar/index.jsp|archive-date=16 July 2021|access-date=2021-07-16 |website=shar.gov.in}}</ref>

== See also ==
{{Portal|Spaceflight}}
* [[RISAT]]
* [[PSLV]]

== References ==
{{Reflist|30em}}

{{RISAT satellites}}
{{Indian spacecraft}}
{{Rest of the World Reconnaissance Satellites}}

[[Category:Earth observation satellites of India]]
[[Category:Space synthetic aperture radar]]
[[Category:2021 in spaceflight]]
[[Category:2021 in India]]
[[Category:Proposed satellites]]

{{India-spacecraft-stub}}