Engineering:RISAT-2BR1

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Short description: Indian Earth observation satellite

RISAT-2BR1
RISAT-2BR1 with its Radial Rib Antenna deployed.png
RISAT-2BR1 with its "Radial Rib Antenna" in deployed configuration.
NamesRadar Imaging Satellite-2BR1
Mission typeEarth observation
Radar imaging satellite
OperatorISRO
COSPAR ID2019-089F
SATCAT no.44857
Websitehttps://www.isro.gov.in/
Mission duration5 years (planned)
4 years, 2 months and 12 days (in progress)
Spacecraft properties
SpacecraftRISAR-2BR1
BusRISAT
ManufacturerIndian Space Research Organisation
Launch mass615 kg (1,356 lb) [1][2]
Power2 kW
Start of mission
Launch date11 December 2019, 09:55 UTC
RocketPolar Satellite Launch Vehicle, PSLV-C48
Launch siteSatish Dhawan Space Centre, First Launch Pad (FLP)
ContractorIndian Space Research Organisation
Entered serviceMarch 2020
Orbital parameters
Reference systemGeocentric orbit
RegimeLow Earth orbit
Perigee altitude555 km (345 mi)
Apogee altitude555 km (345 mi)
Inclination37.0°
Period90.0 minutes
Instruments
Synthetic Aperture Radar (X-band) (SAR-X)
← Cartosat-3
RISAT-2BR2 (EOS-01) →
 

RISAT-2BR1 is a synthetic-aperture radar (SAR) imaging satellite built by Indian Space Research Organisation (ISRO). It is part of India's RISAT series of SAR imaging satellite and fourth satellite in the series. RISAT-2BR1 was launched on 11 December 2019 at 09:55 UTC aboard Polar Satellite Launch Vehicle PSLV-C48 from First Launch Pad (FLP) of Satish Dhawan Space Centre.[3][4] It was the 50th launch of Polar Satellite Launch Vehicle and 75th launch from Satish Dhawan Space Centre.[5][6]

Overview

The RISAT-2BR1 is follow on to RISAT-2B and has an X-band SAR with unfurlable radial rib reflector antenna of 3.6 meter diameter.[7] RISAT-2BR1 can operate in different modes including Very High Resolution imaging modes of 1 x 0.5 m resolution and 0.5 x 0.3 m resolution [8] with swath of 5 to 10 km.[9]

  • Mass: 628 kg (1,385 lb) [10]
  • Orbit: 557 km (346 mi) (circular) at inclination of 37.0° [2]
  • Mission life: 5 years [2]

Launch

RISAT-2BR1 was launched aboard PSLV-C48 on 11 December 2019 at 09:55 UTC with nine other ride-sharing commercial satellites from First Launch Pad of Satish Dhawan Space Centre, SHAR. Launch vehicle used was -QL variant of Polar Satellite Launch Vehicle with four PSOM-XL strap-ons and employed a 195 kg Dual Launch Adapter (DLA) to accommodate primary and secondary payloads. After a flight of 16 minutes 27 seconds, RISAT-2BR1 was separated from PSLV fourth stage (PS4) and injected into 576 km circular orbit with 37.0° inclination. After primary payload, DLA and subsequently nine other co-passenger satellites were separated. RISAT-2BR1 deployed it solar panels within 3 minutes after separation and deployed its 3.6 meter antenna on 08:30 UTC, on 12 December 2019.[11][3]

Secondary payloads

Nine commercial ridesharing satellites weighed 157.6 kg cumulatively.[2][12]

  • QPS SAR-1 "Izanagi"「イザナギ」(~100 kg) X-band SAR imaging satellite with 3.6 m antenna by iQPS.[13][14]
  • Duchifat-3 (2.3 kg) by Sha'ar Hanegev High School students built at Herzliya Science Center.[16]
  • 1HOPSAT (22 kg) high resolution video and imaging satellite by Hera systems for Seguritech of Mexico.[17]

See also

References

  1. ↑ "PSLV-C48/RISAT-2BR1". ISRO. https://www.isro.gov.in/launcher/pslv-c48-risat-2br1. 
  2. ↑ 2.0 2.1 2.2 2.3 "PSLV C48 Press kit". 5 December 2019. https://www.isro.gov.in/sites/default/files/flipping_book/pslv-c48risat-2br1_missionr/files/assets/common/downloads/PSLV-C48RISAT-2BR1%20Mission.pdf. 
  3. ↑ 3.0 3.1 "PSLV successfully launches RISAT-2BR1 and nine commercial satellites in its fiftieth flight". ISRO. 11 December 2019. https://www.isro.gov.in/update/11-dec-2019/press-release-pslv-successfully-launches-risat-2br1-and-nine-commercial. 
  4. ↑ "ISRO's RISAT-2BR1, 9 Other Foreign Satellites Blast Off from Sriharikota". News18. https://www-news18-com.cdn.ampproject.org/v/s/www.news18.com/amp/news/india/with-few-hours-left-for-launch-of-isros-risat-2br1-heres-all-you-need-to-know-about-the-spy-satellite-2419867.html?usqp=mq331AQCKAE=&amp_js_v=0.1. 
  5. ↑ Singh, Surendra (3 December 2019). "ISRO to launch another "eye in the sky" Risat-2BR1 on 11 December 2019, will help boost border surveillance". The Times of India. https://timesofindia.indiatimes.com/india/isro-to-launch-another-eye-in-the-sky-risat-2br1-on-dec-11-will-help-boost-border-surveillance/articleshow/72340281.cms. 
  6. ↑ "ISRO to launch border surveillance satellite Risat-2BR1 on December 11". Business Standard India. 3 December 2019. https://www.business-standard.com/article/current-affairs/isro-to-launch-border-surveillance-satellite-risat-2br1-on-dec-11-119120301040_1.html. 
  7. ↑ "RISAT-2B - Radial Rib Antenna". ISRO. https://www.isro.gov.in/update/22-may-2019/risat-2b-radial-rib-antenna. 
  8. ↑ "Rajya Sabha Unstarred Question No. 1531 - Earth Observation satellite RISAT-2B". 4 July 2019. http://164.100.158.235/question/annex/249/Au1531.pdf. 
  9. ↑ "ISRO to launch second "spy" satellite RISAT-2BR1 on 11 December 2019 to enhance India's surveillance capability". Moneycontrol. 3 December 2019. https://www.moneycontrol.com/news/science/isro-to-launch-second-spy-satellite-risat-2br1-on-december-11-to-enhance-indias-surveillance-capability-4695061.html. 
  10. ↑ "RISAT-2BR1". ISRO. https://www.isro.gov.in/Spacecraft/risat-2br1. 
  11. ↑ "Radial Rib Antenna of RISAT-2BR1 deployed successfully". ISRO. https://www.isro.gov.in/update/12-dec-2019/radial-rib-antenna-of-risat-2br1-deployed-successfully. 
  12. ↑ "List of International Customer Satellites Launched by PSLV". ISRO. https://www.isro.gov.in/sites/default/files/319_satellites_list.pdf. 
  13. ↑ "12月12日（木）小型SAR衛星「イザナギ」との初交信が成功しました！" (in ja). iQPS Inc.. 12 December 2019. https://i-qps.net/news/172. 
  14. ↑ "福岡）ベンチャーが衛星公開 １０月にもインドで発射：朝日新聞デジタル" (in ja). Asahi. 2 September 2019. https://www.asahi.com/articles/ASM924CXSM92TIPE00X.html. 
  15. ↑ "Spaceflight Announces Next Three Rideshare Missions on ISRO's PSLV, Slated Through the End of 2019". Spaceflight. 21 October 2019. https://spaceflight.com/spaceflight-announces-next-three-rideshare-missions-on-isros-pslv-slated-through-the-end-of-2019/. 
  16. ↑ "הלוויין דוכיפת 3 ישוגר בעוד כשבועיים מהודו" (in he-IL). 2019-11-30. https://www.hayadan.org.il/duchifat-3-satellite-will-be-launched-in-two-weeks-from-india-0112191. 
  17. ↑ "Lanzan primer satélite enfocado para videovigilancia en México" (in es-MX). Seguritech. https://seguritech.com/prensa/lanzan-primer-satelite-enfocado-para-videovigilancia-en-mexico/. 
  18. ↑ "Pathfinder Risk Reduction (Tyvak 0129)". https://space.skyrocket.de/doc_sdat/pathfinder-risk-reduction.htm. 
  19. ↑ "Lockheed Martin Launches First Smart Satellite Enabling Space Mesh Networking - January 16, 2020". Lockheed Martin. https://news.lockheedmartin.com/2020-01-16-Lockheed-Martin-Launches-First-Smart-Satellite-Enabling-Space-Mesh-Networking. 
  20. ↑ "אלביט שיגרה לחלל ננו-לוויין ליישומי תקשורת" (in he). Israel Defense. 18 December 2019. https://www.israeldefense.co.il/he/node/41316. 



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