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. Archived from the original on 13 December 2019. Retrieved 5 December 2019.
  2. ^ a b c d "PSLV C48 Press kit" (PDF). 5 December 2019. Archived from the original (PDF) on 10 December 2019. Retrieved 5 December 2019.
  3. ^ a b "PSLV successfully launches RISAT-2BR1 and nine commercial satellites in its fiftieth flight". isro.gov.in. ISRO. 11 December 2019. Archived from the original on 12 December 2019. Retrieved 12 December 2019.
  4. ^ "ISRO's RISAT-2BR1, 9 Other Foreign Satellites Blast Off from Sriharikota". news18.com. News18. Retrieved 11 December 2019.
  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. Retrieved 4 December 2019.
  6. ^ "ISRO to launch border surveillance satellite Risat-2BR1 on December 11". Business Standard India. 3 December 2019. Retrieved 4 December 2019.
  7. ^ "RISAT-2B - Radial Rib Antenna". isro.gov.in. ISRO. Archived from the original on 29 May 2019. Retrieved 4 December 2019.
  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 11 December 2019 to enhance India's surveillance capability". Moneycontrol. 3 December 2019. Retrieved 4 December 2019.
  10. ^ "RISAT-2BR1". isro.gov.in. ISRO. Archived from the original on 12 December 2019. Retrieved 12 December 2019.
  11. ^ "Radial Rib Antenna of RISAT-2BR1 deployed successfully". isro.gov.in. ISRO. Archived from the original on 12 December 2019. Retrieved 12 December 2019.
  12. ^ "List of International Customer Satellites Launched by PSLV" (PDF). ISRO. Archived from the original (PDF) on 12 December 2019. Retrieved 13 December 2019.
  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 Japanese). iQPS Inc. 12 December 2019. Retrieved 12 December 2019.
  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). Asahi. 2 September 2019. Retrieved 12 December 2019.
  15. ^ "Spaceflight Announces Next Three Rideshare Missions on ISRO's PSLV, Slated Through the End of 2019". Spaceflight. 21 October 2019. Retrieved 29 November 2019.
  16. ^ "הלוויין דוכיפת 3 ישוגר בעוד כשבועיים מהודו". הידען (in Hebrew). 30 November 2019. Retrieved 1 December 2019.
  17. ^ "Lanzan primer satélite enfocado para videovigilancia en México" (in Mexican Spanish). Seguritech. Retrieved 12 December 2019.
  18. ^ "Pathfinder Risk Reduction (Tyvak 0129)". space.skyrocket.de. Retrieved 15 January 2020.
  19. ^ "Lockheed Martin Launches First Smart Satellite Enabling Space Mesh Networking - January 16, 2020". Lockheed Martin. Retrieved 22 January 2020.
  20. ^ "אלביט שיגרה לחלל ננו-לוויין ליישומי תקשורת". israeldefense.co.il (in Hebrew). Israel Defense. 18 December 2019. Retrieved 18 December 2019.
Allikas: Https://en.wikipedia.org/wiki/RISAT-2BR1
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