Author Topic: PSLV-CA C56 - DS-SAR - FLP - 30 July 2023 (01:01:00 UTC)  (Read 17335 times)

Offline vyoma

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Re: PSLV-CA C56 - DS-SAR - FLP - 30 July 2023 (01:01:00 UTC)
« Reply #80 on: 07/31/2023 01:01 am »
https://twitter.com/ILAerospaceIAI/status/1685609143883673600

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The DS-SAR satellite has been successfully launched – and entered Earth orbit in space!

The radar satellite, developed and produced by IAI, has begun its space mission and transmitted the first data to the ground station.

Offline vyoma

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Re: PSLV-CA C56 - DS-SAR - FLP - 30 July 2023 (01:01:00 UTC)
« Reply #81 on: 07/31/2023 01:09 am »
https://cde.nus.edu.sg/news-detail/student-built-galassia-2-satellite-blasts-into-orbit/ [30 July 2023]

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Student-built satellite Galassia-2 blasts into orbit



A remote sensing nanosatellite built by multidisciplinary students from CDE has been successfully launched into orbit from the Satish Dhawan Space Centre near Chennai in southern India.

Galassia-2 blasted off at 900 AM on 30 July 2023 aboard PSLV-C56, a rocket operated by the Indian Space Research Organisation (ISRO).

Galassia-2 is a 3U CubeSat class of nanosatellite, measuring 300 millimeters tall, 100 millimeters long by 100 millimeters wide and weighs about four kilograms. Its primary mission is remote sensing for agriculture and environmental change using a multispectral camera on board.

Galassia-2 was launched alongside six other satellites, including the 351.9 kilogram DS-SAR, a Singapore-owned earth observation satellite.

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After deployment, mission controllers will spend the next few days stabilising and establishing contact with Galassia-2, checking that all the deployables have performed correctly, and conducting functional tests for the satellite’s sub-systems before beginning the mission proper. It is expected to be operational for between six months and a year.

Offline vyoma

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Re: PSLV-CA C56 - DS-SAR - FLP - 30 July 2023 (01:01:00 UTC)
« Reply #82 on: 08/05/2023 09:45 pm »
https://www.isro.gov.in/de-orbiting-PS4-PSLVC56.html

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De-orbiting PS4 stage in PSLV-C56 Mission

August 05, 2023

PSLV-C56 vehicle successfully injected DS-SAR and 6 other satellites into their intended 536 km circular Low Earth Orbit (LEO) with a 5-degree inclination on July 30, 2023. The vehicle achieved the precise target orbit conditions in 20 minutes after lift-off using the Onboard Navigation, Guidance and Control system and completed its mission.

Left alone in a 536 km circular orbit, the PS4 stage would orbit the Earth for over 25 years. As the number of satellites in LEO is growing and the space around this orbit is of particular interest, the orbit of the spent PS4 stage was reduced to 300 km circular. In line with India's commitment to supporting worldwide space debris mitigation efforts, the Onboard Guidance Algorithm was modified to achieve this orbit-change manuevre. The Orbit Change Thrusters (low thrust engines) were fired twice for orbit change.

Furthermore, in line with standard launch practices, the PS4 Stage was passivated after the re-orbiting process, as no further active propulsion need was anticipated. This passivation involved venting of all pressurized compartments (Tanks/Gas bottles) to release any stored energy or potential hazardous substances. By mitigating the possibility of pressurized compartment failures, the chance of fragmentation of the spent stage in orbit is minimized, thereby further reducing the creation of space debris.
« Last Edit: 08/05/2023 09:45 pm by vyoma »

Offline FutureSpaceTourist

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Re: PSLV-CA C56 - DS-SAR - FLP - 30 July 2023 (01:01:00 UTC)
« Reply #83 on: 08/06/2023 11:18 am »
https://twitter.com/chethan_dash/status/1688145086318833665

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#Update #space

@isro has de-orbited #PS4 of #PSLVC56 which launched 7 Singapore sats on Jul 30. Left alone in a 536km circular orbit, PS4 would orbit Earth for 25+yrs. It is now pushed to a 300km circular orbit.

Pic: Isro

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