On June 30, 2022, Beijing time, the PSLV-C53 launch vehicle carrying the main satellite DS-EO and three satellites including NeuSAR and Scoob-1, launched from Sadish Dhawan, Sriharikota Island. The space center's launch station No. 2 was successfully launched. At the same time, there is something special about this mission. It will reuse the core fourth stage (upper stage) of the launch vehicle .
PSLV-C53 launched an operation called PSLV Orbital Experiment Module (POEM), using the rocket upper stage as an orbital platform to conduct on-orbit scientific experiments. This is the first time that the PSLV core level 4 has been used as a stable platform to orbit the Earth, using a dedicated NGC system to achieve attitude stabilization. The POEM's power comes from solar panels installed around the upper stage tank and a lithium-ion battery . It uses four sun sensors, a magnetometer, gyroscope and NavIC for navigation. It is equipped with a dedicated control thruster using helium , and supports remote command control. Six payloads are carried on board the POME module, two of which are from Indian space startups Digantara and Dhruva Space.
In the reuse of upper stages, the little recycling expert Space
On March 17, 2022, Beijing time, the "Long March 4C" Yuan 47 carrier rocket carrying the "Yao Gan 34" 02 satellite was successfully launched from the Jiuquan Launch Site. In addition to completing its main mission, this rocket is also equipped with a final stage verification system, which was developed by the Eighth Academy of China Aerospace Science and Technology Corporation (Shanghai Aerospace). It uses the final stage of the rocket that has completed its main mission to build a loading platform and carry out technical verification.
final sub-stage verification system is derived from the Shanghai Aerospace low-cost space test system. The latter is an upgrade and transformation of the final sub-stage of the launch vehicle that remains in orbit, making full use of its complete structure and orbit residence time, and adding independent energy, communication and control modules. , and continuously improve and upgrade space environment measurement capabilities, can provide standard mechanical, electrical, thermal and information interfaces for on-orbit testing of components, components and loads, becoming a new low-cost, normalized space test system.
refers to the above two upper stage (last sub-stage) reuse schemes, both of which add independent energy, communication and control modules to the upper stage to provide standard mechanical, electrical, thermal and information interfaces for the test load. Created a satellite platform. On this basis, different space experiments are carried out by carrying different payloads.
Through the reuse of the upper stages, not only can many rocket final stages be turned into valuables for reuse, but it can also reduce the launch requirements of test satellites, thereby effectively reducing space debris and making the best use of launch vehicle materials. Kill multiple birds with one stone!
Author: Dabai Gaoguo
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