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#REDIRECT [[EOS-04]]
{{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


{{Redirect category shell|
| mission_type      = [[Imaging radar]]
{{R from move}}
| 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 ==
* [[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}}

Latest revision as of 20:27, 14 August 2023


RISAT-1A
NamesRadar Imaging Satellite-1A
Earth Observation Satellite-4
Mission typeImaging radar
OperatorISRO
COSPAR ID{{#property:P247}}
Websitewww.isro.gov.in
Mission duration5 years (planned)
Spacecraft properties
SpacecraftRISAT-1A
ManufacturerIndian Space Research Organisation
Launch mass1,858 kg (4,096 lb)
Power1850 watts
Start of mission
Launch dateNET 6 January 2022(Expected)
RocketPolar Satellite Launch Vehicle, PSLV-C52
Launch siteSatish Dhawan Space Centre, First Launch Pad (FLP)
ContractorIndian Space Research Organisation
Orbital parameters
Reference systemGeocentric orbit[1]
RegimeSun-synchronous orbit
Perigee altitude536 km (333 mi)
Apogee altitude536 km (333 mi)
Inclination97.84°
Period96.50 minutes
Instruments
Synthetic Aperture Radar (X-band) (SAR-X)
 

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.[2]

Satellite description[edit | edit source]

Synthetic aperture radar can be used for Earth observation irrespective of the light and weather conditions of the area being imaged.[3] The satellite will carry a C-band synthetic-aperture radar (SAR) and will have a liftoff mass of 1,858 kg (4,096 lb).[1]

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

Category Parameters
Land Albedo and reflectance
Soil moisture
Vegetation
Multi-purpose imagery
Ocean Ocean topography/currents
Snow & Ice Ice sheet topography
Snow cover, edge and depth
Sea ice cover, edge and thickness

Launch[edit | edit source]

RISAT-1A will be launched on the Polar Satellite Launch Vehicle (PSLV-C52). RISAT-1A is planned to be launched NET 6 January 2022.[4]

See also[edit | edit source]

References[edit | edit source]

  1. ↑ 1.0 1.1 Reddy, O.V. Raghav (3 February 2016). "Future Earth Observation Missions of ISRO, NRSC User Interaction Meet 2016" (PDF). Archived from the original (PDF) on 3 February 2017.
  2. ↑ "CEOS Instrument: Synthetic Aperature Radiometer (RISAT)". Retrieved 9 February 2016.
  3. ↑ Raj, N. Gopal (25 April 2012). "RISAT-1's radar can see through clouds and work in darkness". The Hindu. Chennai, India.
  4. ↑ "SDSC-SHAR Website". shar.gov.in. Archived from the original on 16 July 2021. Retrieved 16 July 2021.

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