SSLV-D1/EOS-02 Mission: ISRO says satellites are placed in wrong orbit, which are no longer usable. India News – Times of India

Sriharikota: A few hours after its launch small satellite launch vehicle ,SSLV), carrying the EOS-2 and AzadiSat satellites from the Satish Dhawan Space Center in Sriharikota on Sunday morning, Indian Space Research Organization (ISRO)ISRO) stated that the satellites are no longer usable because they have deviated from their circular orbit.
It added that a committee would analyze the issue and following its recommendations, ISRO would soon be back with SSLV-D2.
“(Girl) SSLV-D1 placed the satellites in a 356 km x 76 km elliptical orbit instead of a 356 km circular orbit. The satellites are no longer usable. The problem has been properly identified. The sensor failure has been identified and a Failure of an argument to go for the defense action has caused divergence,” it tweeted.

Earlier, the space agency said, “the achieved orbit was lower than expected, which makes it unstable”.
“All phases of the launch performed normal. Both the satellites (Earth Observation Satellite and AzadiSat) were injected. But the orbit achieved was less than expected, which makes it unstable,” ISRO said.

Soon after the launch, ISRO Chairman S Somnath had said SSLV-D1/EOS-02 Mission Encountered data loss in its terminal stage.

“All the phases performed as expected. Phase I was demoted and separated, Phase II was performed and separated, Phase III was also performed and separated, and in the terminal phase of the mission, some data loss is occurring and we We are analyzing the data and we will be back soon on the position of the satellites as well as the performance of the vehicle,” ISRO Chairman Somnath said from the Mission Control Center minutes after the launch.

The first small satellite launch vehicle took off from the first launch pad of the Satish Dhawan Space Center in Sriharikota at 9.18 a.m. The countdown for the mission began at 2:26 a.m.
The 120-tonne SSLV, which is a solid stage rocket of 34 meters height and two meters in diameter, is capable of launching mini, micro or nano satellites weighing 10 to 500 kg. SSLV is a three stage (solid propulsion) vehicle.

Key features of SSLV include its low cost, short turnaround time, flexibility to accommodate multiple satellites, launch-on-demand feasibility, minimum launch infrastructure requirements.
The rocket can be built within a week due to the introduction of several innovative features. These include modular systems, simplified pyro circuits and modular features for separation systems, multi-satellite adapter decks, miniature low-cost avionics with commercial off-the-shelf components, rapidly reconfigurable check-ins with minimal ground interfaces. On-board computers are included with the out system. ,

Some of the new systems introduced in the launch vehicle include the SS1 motor, which is ISRO’s third largest solid booster, the SS3 motor, which is a new composite upper stage solid motor, and a liquid propulsion-based terminal for precise injection of satellites. is step.

two satellites
The 145 kg EOS-2 is an experimental imaging satellite with a short turn-around time and a high spatial resolution. EOS-02 belonged to the Microsatellite series of spacecraft.
AzadiSat is an 8U CubeSat weighing about 8 kg. It carries 75 different payloads, each of which weighs about 50 grams and is female-led. The payloads were built by girl students from rural areas across the country. The payload includes a UHF-VHF transponder operating in ham radio frequencies to enable voice and data transmission for amateur radio operators, a solid-state PIN diode-based radiation counter to measure ionizing radiation in its orbit, a long Includes distance transponder and a selfie. Camera.
watch First SSLV flight completed, some data loss in final stage: ISRO