The Space capsule Recovery Experiment (SRE-1) launched by Polar Satellite Launch Vehicle (PSLV-C7) from Satish Dhawan Space Centre (SDSC) SHAR, Sriharikota on January 10, 2007 was successfully recovered today (January 22, 2007) after being manoeuvred to re-enter the earth’s atmosphere and descend over Bay of Bengal about 140 km East of Sriharikota.
Today, January 22, 2007, the re-orientation of SRE-1 capsule for de-boost operations commenced at 08:42 am (IST). The de-boost started at 09:00 am with the firing of on-board rocket motors and the operations were completed at 09:10 am. At 09:17 am, SRE-1 capsule was reoriented for its re-entry into the dense atmosphere. The capsule made its re-entry at 09:37 am at an altitude of 100 km with a velocity of 8 km/sec (29,000 km per hour). During its re-entry, the capsule was protected from the intense heat by carbon phenolic ablative material and silica tiles on its outer surface.
By the time SRE-1 descended to an altitude of 5 km, aerodynamic breaking had considerably reduced its velocity to 101 m/sec (363 km per hour). Pilot and drogue parachute deployments helped in further reducing its velocity to 47 m/sec (about 170 km per hour).
The main parachute was deployed at about 2 km altitude and finally, SRE-1 splashed down in the Bay of Bengal with a velocity of 12 m/sec at 09:46 am. The flotation system, which immediately got triggered, kept the capsule floating. Recovery operations were supported and carried out by the Indian Coast Guard and Indian Navy using ships, aircraft and helicopters.
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