The Small Satellite Launch Vehicle (SSLV) project of ISRO failed

The Small Satellite Launch Vehicle (SSLV) project of ISRO failed

August 10, 2022 - 4:25 am

he rocket's two delivered satellites were rendered useless

Despite successfully launching India’s brand new Rs 56 crore rocket on its maiden flight from Satish Dhawan Space Centre in Sriharikota, ISRO’s Small Satellite Launch Vehicle (SSLV) mission ended up being unsuccessful. The two satellites that were delivered onboard the rocket were rendered useless, which is why the mission was a disaster. The SSLV, or Small Satellite Launch Vehicle, is India's newest rocket and had its first launch delayed numerous times during the previous three years. The rocket made its first flight on Sunday, carrying two satellites, including the EOS-02 microsatellite for earth observation.  But the flight did not go on expected lines. The flight strayed from plan after a successful lift-off and separation of its three segments. The two satellites, EOS02 and one built by schoolgirls called AzaadiSat, were put in an orbit different than intended, and were rendered unstable. 

Cause of Failure

It appears that a malfunctioning sensor was the cause of the mission's failure. Nevertheless, aside from the "anomaly" that caused the mission to fail, the overall design of ISRO's most recent rocket operated well. The fact that the rocket's many stages all operated as intended has pleased scientists. The Velocity Trimming Module (VTM), which inserts the satellites into their appropriate orbits, is being blamed for the mishap because it failed to ignite at the terminal stage. During the first of the planned thirty seconds of operation, the VTM was hardly lit. Even though it was claimed that everything went off without a hitch, the Indian space agency held off on declaring the mission a success until after data loss was mentioned.

Other Unsuccessful Missions of ISRO

But this isn't the first time that ISRO has experienced difficulties with a launch mission. Here are several unsuccessful ISRO missions: On August 10, 1979, the nation's maiden experimental launch of SLV-3 carrying Rohini Technology Payload failed to place the satellite into its target orbit, marking the ISRO's first significant satellite failure. On March 24, 1987, the first ASLV (Augmented Satellite Launch Vehicle) developmental mission carried the 150 kilogramme satellite SROSS-1 into orbit. It was unable to enter Earth's orbit, though. The PSLV, known as one of the reliable workhorses of ISRO, failed on its inaugural flight. It did, however, prove to be a dependable and adaptable launch vehicle for the space agency with the successful launch the next year. The nation's first effort to launch a hefty communication satellite, the GSLV-F02 launch vehicle, also failed. In its 41st flight, the PSLV-C39, which was meant to launch IRNSS-1H, proved unsuccessful. Despite a smooth take-off, the mission failed because the satellites separated inside the heat shield. 2019 saw the launch of Chandrayaan-2, ISRO's second moon mission. However, this mission was also a failure because the lander didn't land gently but instead slammed into the lunar surface. Both the Lander and the Rover perished. Just 350 seconds after taking off from India's spaceport, the GSLV Mk 2 rocket carrying the earth observation satellite GISAT-1 failed to reach orbit. According to ISRO's preliminary analysis, the failure was caused by "a technical malfunction in the cryogenic stage."

Small Satellite

For a very long time, small satellites – anything weighing between 5 & 1,000 kg – have had to remain content with hitching a ride to space on rockets commissioned to carry some other, larger satellites. Over the last eight to ten years, there has been an increase in demand for the launch of small satellites due to the increased need for space-based data, communication, surveillance, and commerce. Tens of thousands of tiny satellites are expected to be deployed in the next ten years. Several new players have started to provide launching services, both in the public and private sectors. In India, where the space sector is fast being opened for the private sector, at least three private companies are developing rockets that can launch small satellites into space. It is to cater to this demand, and to grab this business opportunity, that ISRO has developed the SSLV.

Space Agency ‘s Committee Analyzation

With its first SSLV flight encountering bad weather, the Indian Space Research Organization (ISRO) had a difficult day. The space agency said a committee would analyse and make recommendations into Sunday’s episode and with the implementation of those recommendations ISRO will return shortly with SSLV-D2. Instead of a 356 km circular orbit, SSLV-D1 put the satellites into a 356 km x 76 km elliptical orbit. Satellites are no longer usable. Issue is reasonably identified. The divergence was brought on by a logic that failed to recognise a sensor failure and pursue a salvage strategy. Since this was SSLV's first launch, modest glitches were anticipated, according to space experts.

Questions and Answers Questions and Answers

Question : What caused the SSLV mission to be considered a failure?
Answers : The two satellites that were delivered onboard the rocket were rendered useless.
Question : What was the cause of the flight straying from its plan?
Answers : A malfunctioning sensor caused the flight to veer off course.
Question : What was the main reason given for the failure of the Indian space agency's launch mission?
Answers : The Velocity Trimming Module (VTM) failed to ignite at the terminal stage, which caused the satellite to be placed into the wrong orbit.
Question : Given that the first two launch vehicles failed, why was the PSLV considered a success?
Answers : The PSLV was considered a success because it was able to enter orbit on its second try.
Question : Why was the PSLV-C39's 41st flight unsuccessful?
Answers : The mission failed because the satellites separated inside the heat shield.
Question : Why did the GSLV rocket carrying GISAT-1 fail to reach orbit?
Answers : The failure was caused by "a technical malfunction in the cryogenic stage."