As a part of India’s continual efforts towards preservation of the long-term sustainability of outer space, INSAT-4B has undergone post mission disposal (PMD) at the end of its life, followed by decommissioning on 24 January 2022, to comply with the UN and the Inter Agency Space Debris Coordination Committee (IADC) recommended space debris mitigation guidelines.

INSAT-4B is the 21st Indian GEO satellite to undergo post-mission disposal, the required propellant for such re-orbiting was included in the initial fuel budget as a part of standard practice followed in ISRO's GEO mission planning. The finally achieved orbit is about 340 km above GEO altitude in perfect compliance with IADC guidelines for space debris mitigation of GEO objects.

The successful post-mission disposal of INSAT-4B through meticulous planning and flawless execution marks yet another endeavour by ISRO to ensure the safety and sustainability of outer space operations.