RISAT-2BR1

RISAT-2BR1 is a synthetic-aperture radar (SAR) imaging satellite for reconnaissance built by Indian Space Research Organisation (ISRO). It is part of India's RISAT series of SAR imaging spacecrafts and fourth satellite in the series. RISAT-2BR1 was launched on 11 December 2019 at 09:55 UTC aboard PSLV-C48 from First Launch Pad 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]

RISAT-2BR1
RISAT-2BR1 with its 'Radial Rib Antenna' in deployed configuration
Mission typeRadar imaging
OperatorISRO
COSPAR ID2019-089F
SATCAT no.44857
Mission durationPlanned: 5 years[1]
Elapsed: 7 months, 29 days
Spacecraft properties
ManufacturerISRO
Launch mass628 kg (1,385 lb)[2][1]
Start of mission
Launch date11 December 2019, 09:55 UTC
RocketPSLV-QL C48
Launch siteSatish Dhawan FLP
ContractorISRO
Orbital parameters
Reference systemGeocentric
Perigee altitude560 km (350 mi)
Apogee altitude560 km (350 mi)
 

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 1m x 0.5m resolution and 0.5m x 0.3m resolution[8] with swath of 5 to 10 km.[9]

  • Mass: 628 kg [10]
  • Orbit: 557 km (circular) at inclination of 37° [1]
  • Mission life: 5 years [1]

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 SDSC 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 flight of 16 minutes 27 seconds, RISAT-2BR was separated from PSLV fourth stage (PS4) and injected into 576 km circular orbit with 37° inclination. After primary payload, DLA-Upper 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 0830 UTC, 12 December 2019.[11][3]

Secondary payloads: [1]

Nine commercial ridesharing satellites weighed 157.6 kg cumulatively.[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]
  • Four Lemur-2 cubesats by Spire Global.[15]
  • 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]
  • Tyvak-0129 (11 kg) [18][19]
  • Tyvak-0092 (5 kg) (NANOVA)[20]
gollark: Too circular. Bad.
gollark: Because it is the future™, even this £10 watch can trivially beat specialised mechanical chronometer things used for navigation on ships, if I IIRC.
gollark: No.
gollark: It is very good at this.
gollark: Because I wanted a highly generic cheap watch.

See also

References
  1. "PSLV C48 Press kit" (PDF). 5 December 2019. Archived from the original (PDF) on 10 December 2019. Retrieved 5 December 2019.
  2. "PSLV-C48/RISAT-2BR1 - ISRO". Indian Space Research Organisation. Retrieved December 5, 2019.
  3. "Press Release - PSLV successfully launches RISAT-2BR1 and nine commercial satellites in its fiftieth flight - ISRO". www.isro.gov.in. Retrieved 2019-12-12.
  4. "ISRO's RISAT-2BR1, 9 Other Foreign Satellites Blast Off from Sriharikota". www-news18-com.cdn.ampproject.org. Retrieved 2019-12-11.
  5. Dec 3, Surendra Singh | TNN | Updated; 2019; Ist, 2:51. "Isro to launch another 'eye in the sky' Risat-2BR1 on December 11, will help boost border surveillance | India News - Times of India". The Times of India. Retrieved 2019-12-04.CS1 maint: numeric names: authors list (link)
  6. IANS (2019-12-03). "ISRO to launch border surveillance satellite Risat-2BR1 on Dec 11". Business Standard India. Retrieved 2019-12-04.
  7. "RISAT-2B: Radial Rib Antenna - ISRO". www.isro.gov.in. Retrieved 2019-12-04.
  8. "Rajya Sabha Unstarred Question No. 1531 : Earth Observation satellite RISAT-2B" (PDF). 4 July 2019. Retrieved 4 July 2019.
  9. "ISRO to launch second 'spy' satellite RISAT-2BR1 on December 11 to enhance India's surveillance capability". Moneycontrol. Retrieved 2019-12-04.
  10. "RISAT-2BR1 - ISRO". www.isro.gov.in. Retrieved 2019-12-12.
  11. "Radial Rib Antenna of RISAT-2BR1 deployed successfully - ISRO". www.isro.gov.in. Retrieved 2019-12-12.
  12. "List of International Customer Satellites Launched by PSLV" (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！". iQPS Inc. (in Japanese). Retrieved 2019-12-12.
  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". 朝日新聞デジタル (in Japanese). Retrieved 2019-12-12.
  15. "Spaceflight Announces Next Three Rideshare Missions on ISRO's PSLV, Slated Through the End of 2019". Spaceflight. 2019-10-21. Retrieved 2019-11-29.
  16. "הלוויין דוכיפת 3 ישוגר בעוד כשבועיים מהודו". הידען (in Hebrew). 2019-11-30. Retrieved 2019-12-01.
  17. "Lanzan primer satélite enfocado para videovigilancia en México | Seguritech" (in Spanish). Retrieved 2019-12-12.
  18. "Pathfinder Risk Reduction (Tyvak 0129)". space.skyrocket.de. Retrieved 2020-01-15.
  19. "Lockheed Martin Launches First Smart Satellite Enabling Space Mesh Networking - Jan 16, 2020". Media - Lockheed Martin. Retrieved 2020-01-22.
  20. "אלביט שיגרה לחלל ננו-לוויין ליישומי תקשורת | Israel Defense". www.israeldefense.co.il (in Hebrew). Retrieved 2019-12-18.
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