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ISRO puts an earth observation satellite into the orbit

India on Thursday put into orbit its own Hyper Spectral Imaging Satellite (HysIS) — an earth observation satellite — and 30 other foreign satellites in text-book style.

In the process, India has crossed the milestone of lifting and putting into orbit over 250 foreign satellites. India has till date has put into orbit 269 foreign satellites.

The notable aspect of the rocket mission is the placing of the satellites in two different orbits — one at a higher altitude and the others in a lower altitude.

After the successful launch, Indian Space Research Organisation (ISRO) Chairman K. Sivan said: “Once again Indian space scientists showed their excellence. The PSLV injected the HysIS first and later the 30 foreign customers satellites.

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“The HysIS is a state-of-the-art satellite. The heart of the satellite, the optical imaging chip was designed and fabricated by ISRO.

Sivan also said that the next launch will be of communication satellite GSAT-11 from French Guiana on December 5 which will followed by GSAT-7A by the Indian rocket Geosynchronous Satellite Launch Vehicle (GSLV) from here.

At 9.58 a.m., the four staged/engine PSLV-CA rocket, standing 44.4 metres tall and weighing about 230 tonnes, blasted off from the first launch pad.

With the fierce orange flame at its tail, the rocket slowly gained speed and went up enthralling the people at the rocket port while the rocket’s engine noise like a rolling thunder adding to the thrill.

More thrilling aspect came in when rocket’s fourth stage/engine was cut/switched off in just over 16 minutes after the lift off. A minute later, the Indian satellite HysIS with a mission life of five years was placed in 636 km polar sun synchronous orbit.

Following that the rocket was brought to a lower altitude of 503 km. Post HysIS ejection, the rocket’s fourth stage was restarted at 59.65 minutes after the lift off.

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The primary goal of HysIS is to study the earth’s surface in visible, near infrared and shortwave infrared regions of the electromagnetic spectrum. It will also be used for strategic purposes.

The co-passengers of HysIS include one micro and 29 nano satellites from eight different countries. Later, the rocket was switched off and on twice before the final foreign passenger was put into orbit about 112.79 minutes after the rocket’s lift off.

All the foreign satellites were placed in a 504 km orbit. While 23 satellites are from the US, the rest are from Australia, Canada, Columbia, Finland, Malaysia, the Netherlands and Spain.

These satellites have been commercially contracted for launch through Antrix Corporation Limited, the commercial arm of ISRO.

ISRO had earlier carried out a satellite mission spread over two hours in January.

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India increasing production of solid fuel boosters for rockets

ISRO puts an earth observation satellite into the orbit
Sriharikota: Indian rocket Polar Satellite Launch Vehicle (PSLV) carrying country’s Hyper Spectral Imaging Satellite (HysIS) — an earth observation satellite — and 30 other foreign satellites lifts off from Sriharikota on Nov 29, 2018. The PSLV-CA (Core Alone) version (without its usual strap-on motors), standing 44.4 metres tall and weighing about 230 tonne, took off at 9.58 a.m. | Photo: by IANS/PIB

The Indian space agency is increasing the production of its solid boosters to power more number of rockets that it is planning to send up carrying satellites, the agency said.

According to the Indian Space Research Organisation (ISRO), its Solid Propellant Space Booster Plant (SPROB) is setting up 29 additional facilities with innovative technical aspects and fail-safe process automation to increase the annual production by several times.

The space agency said SPROB is now carrying out a challenging task to deliver 12 numbers of S139 motors by 2019 end, which is double the present capacity. The S139 motors powers the first stage of Indian rocket Polar Satellite Launch Vehicle (PSLV).

The plant is located at Satish Dhawan Space Centre (SDSC) here where the Indian rocketport is also located. On Wednesday, ISRO celebrated the completion of 1,000th sold motor casting by SPROB.

For developing the essential expertise in large Solid Rocket Motors, SPROB was established at Sriharikota and commissioned in 1977 with the realisation of a one metre diameter monolithic motor for SLV-3 (Space Launch Vehicle-3).

According to ISRO, in the 1980s, the requirement of the operational PSLV called for a major expansion of the scope and capacity of the facilities at SPROB.

This necessitated quantum shift in propellant formulation technology using the indigenously developed HTPB binder and vertical propellant mixers. Self-reliance in solid propellant production was achieved by indigenous development and realisation of several specialised equipment.

For manufacturing the massive S200 solid rocket motors of GSLV MkIII (Geosynchronous Satellite Launch Vehicle Mk III), a new plant was built at SPROB.

Successful commissioning of this vast with state of the art plant in 2008 has enabled the Indian space programme to evolve complex missions like Chandrayaan-2 and Gaganyaan.

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