PSLV-C45 mission: Countdown begins for launch of EMISAT satellite with many a firsts for ISRO

PSLV-C45 mission: Countdown begins for launch of EMISAT satellite with many a firsts for ISRO

A 27-hour countdown began on Sunday for the launch of India’s EMISAT satellite along with 28 nano satellites of global customers from Sriharikota Monday, a mission which would witness the ISRO placing payloads in three orbits and conducting space experiments for the first time.

The EMISAT satellite is aimed at electromagnetic measurement.

The countdown began at 6.27 am for the launch on board Indian Space Research Organisation’s third generation workhorse Polar Satellite Launch Vehicle (PSLV), in its 47th flight, ISRO said.
The four-stage PSLV-C45 will blast off from the second launch pad at the spaceport of Sriharikota, about 125 kms from here, at 9.27 AM Monday, agency officials said.

The mission will mark several firsts to the credit of the space agency as it would manoeuvre satellites in various orbits and orbital experiments including on maritime satellite applications.

According to ISRO, a new variant of the rocket PSLV-QL equipped with four Strap-On motors in the first stage is used for the launch.

PSLV, also used in India’s two key missions – “Chandrayan” in 2008 and Mars Orbiter in 2013, is a reliable and versatile launch vehicle for ISRO with 39 consecutive successful flights till June, 2017 and five-in-a row from January 2018.

The rocket has encountered only two failures so far – its maiden developmental flight ended unsuccessful way back in 1993. In September, 2017 the flight went off without any hitch but the IRNSS-1H Satellite could not be released into orbit after the PSLV-C39’s heat shield failed to open on reaching the orbit.

In Monday’s mission, ISRO scientists would place the satellites and payloads in three different orbits, a first for the agency.
After injecting the 436 kg primary satellite EMISAT, intended for electromagnetic spectrum measurement, at around 17 minutes from lift off in a 749 km orbit, they would restart the fourth stage again.

During this initiative, all the other 28 customer satellites, totally weighing about 220 kgs, would be released by lowering the fourth state to around 504 kms orbit.

Again, the fourth stage would be reignited and further lowered to 485 kms orbit to serve as an orbital platform for carrying out space borne experimentations for the first time in ISRO’s history.



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