Thread by @Chethan_Dash

#JUSTIN #Important #Thread 

Indian radar-imaging satellite — #Risat2 — has made an uncontrolled re-entry into Earth’s atmosphere and landed at the predicted impact point in the Indian Ocean near Jakarta. 1/n

The re-entry happened on October 30, at around 12.06am, the Indian Space Research Organisation — @isro —has confirmed. 2/n

“Launched onboard PSLV-C12 in April 2009, Risat-2 weighed about 300kg and had carried 30kg fuel for an initial designed life of four years...." 3/n

"...With proper maintenance of orbit and mission planning by the spacecraft ops team, by economical usage of fuel, #Risat2 provided very useful payload data for 13 years,” Isro said. 4/n

On re-entry, there was no fuel left in the satellite and hence there are no contaminations or explosion by fuel is expected, Isro said. 5/n

It added that studies confirmed that the pieces generated due to aero-thermal fragmentation would not have survived re-entry heating and hence no fragments would have impacted on Earth. 6/n

The Indian System for Safe and Sustainable Space Operations Management (IS4OM), which was operationalised recently at ISTRAC had been monitoring the re-entry for one month... 7/n

...along with analysis carried out by VSSC and Istrac teams through its in-house developed analysis software. 8/n

The teams were tracking the satellite utilising the multi-object tracking radar (MOTR) at the Satish Dhawan Space Centre (SDSC) in Sriharikota. 9/n

“MOTR tracked it regularly and the data was used for further analysis and orbit determination. The orbital data available from USSPACECOM were regularly used to predict the re-entry time and impact,” Isro said. 10/n

@isro too carried out in-house predictions. “Risat-2 is a clear example of Isro’s capability to carry out spacecraft orbital operations in an efficient and optimal way... 11/n

...As #Risat2 re-entered within 13.5 years, it complied with all necessary international mitigation guidelines for space debris," Isro added.