Bengaluru: Indian Space Research Organization (ISRO), as part of its sustainable efforts on the preservation of long-term spacecraft sustainability, has disabled SATS-4B through 11 maneuvers that encourage communication satellites to international orbits mandated by international guidelines.
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“Insat-4b has undergone a post-mission disposal (PMD) at the end of his life was followed by deactivating January 24, 2022 to comply with the United Nations and the Inter Agency (IADC) debris living room coordination committee (IADC) which was recommended by room mitigation guidelines for space debris,” ISRO said.
INSAT-4B was launched on March 12, 2007 for DTH and other communication services.
After completing nearly 14 years on-orbit operation, the ribbon C band and my band from Insat-4B was migrated to another GSAT before the start of the mission posts.
“According to the IADC space mitigation guidelines, at the end of their lives, the Geo object must be raised to orbit which is almost coiled properly on Geo Belt to prevent the orbit back to the protected region of Geo within 100 years.
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In this case, the increase in minimum orbits What is needed is 273 km and this is achieved through 11 maneuvers that orbit back which are executed during January 17-23, 17-23, “said Isro.
The space agency added that the first maneuver was intended to rotate orbits.
The next orbiting maneuver is executed on perigees (closest to the earth) and apogees (the furthest) alternately makes the intermediate orbits near circular.
“All plans are filtered to ensure that there is no close approach or a threat of a collision between other space objects (active satellites and room debris) in the near future.
On January 24, the remaining propellant ventilation and electric passive activities are carried out to minimize.
Risk of breaking Post-mission before finally disabling satellites, “Isro said.
This telecommunications intensive operation, he said, was executed between 70-74 degrees of East Longitude to avoid radio frequency disorders with other operational geo satellites.
“Satat-4b is the 21st Indian Geo Satelit for PMD 340 Km Geo Height in Perfect Compliance with IADC Guidelines for Mitigation of Geo Object Room Debris, “added Isro.
PMD is successful through careful planning and disabled execution marking other ISRO efforts to ensure the safety and sustainability of outer space operations.