ISRO’s Faces SSLV-D1 Data Loss at Terminal Phase of the Mission, Placed in Wrong Orbit

ISRO launched SSLV-D1, its first new rocket on Sunday, carrying Earth Observation Satellite (EOS-02) and AzaadiSAT.

ISRO’s Faces SSLV-D1 Data Loss at Terminal Phase of the Mission, Placed in Wrong Orbit

Photo Credit: ISRO/ Twitter

AzaadiSAT satellite comprised 75 payloads built by 750 students from 75 rural schools

Highlights
  • ISRO chief said that the achieved orbit was unstable
  • General public saw launch from Satish Dhawan Space Centre viewing gallery
  • ISRO stated that logic sensor failure lead to the deviation

The Indian Space Research Organisation (ISRO) on Sunday said its Small Satellite Launch Vehicle (SSLV-D1) placed satellites into elliptical orbit instead of a circular orbit. Sharing the updates of its satellite launch, ISRO said "SSLV-D1 placed the satellites into 356kx76km elliptical orbit instead of 356km circular orbit. Satellites are no longer usable. The issue is reasonably identified. Failure of a logic to identify a sensor failure and go for a salvage action caused the deviation. A committee would analyse and recommend. With the implementation of the recommendations, ISRO will come back soon with SSLV-D2."

Earlier in the day, ISRO launched its first new rocket the Small Satellite Launch Vehicle (SSLV-D1) carrying Earth Observation Satellite (EOS-02) and a student-made satellite-AzaadiSAT from the Satish Dhawan Space Centre (SDSC) in Andhra Pradesh's Sriharikota.

To mark the country's celebrations of "Azaadi Ka Amrit Mahotsav", the SSLV, co-passenger satellite called "AzaadiSAT" comprising 75 payloads built by 750 students from 75 rural government schools across India was launched.

ISRO Chairman S Somanath on Sunday said that both Small Satellite Launch Vehicle (SSLV-D1) carrying Earth Observation Satellite (EOS-02) were injected but the "orbit achieved was less than expected which makes it unstable."

"All stages performed normal. Both satellites were injected. But the orbit achieved was less than expected which makes it unstable," the ISRO chief said.

He further said that the SSLV-D1 suffered data loss at the terminal phase of the mission.

"In the terminal phase of the mission, some data loss is occurring. We are analysing the data to conclude the final outcome of the mission with respect to achieving a stable orbit," Somanath added.

Girls who designed the satellite also witnessed the SSLV-D1 launch. The general public also witnessed the launch from the viewing gallery of Satish Dhawan Space Centre (SDSC) in Sriharikota.


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