Monday July 23, 2018
Home India ISRO upbeat a...

ISRO upbeat after successful launch of six Singaporean satellites

0
//
69
Republish
Reprint

Sriharikota: India on Wednesday successfully launched six Singaporean satellites. As the Indian space agency achieved the milestone of its 50th rocket launch from here, its chief said they are now looking at the way forward and have a lot more to achieve.

The Polar Satellite Launch Vehicle’s core alone (PSLV-CA) variant — standing 44.4 metres tall and weighing around 227 tonnes — took off from the Sriharikota rocket port in Andhra Pradesh, around 80 km from Chennai. It rose into the evening skies, riding majestically on the tail of fierce orange flames.

Expressing satisfaction at ISRO’s performance in 2015, the space agency’s chairman A S Kiran Kumar said it was now way forward to 2016.

ISRO will carry on the activity of putting satellites — both communication and earth observation variants — into orbit, he said.

“We have a lot more to achieve next year,” he said.

Another official said with Wednesday’s successful blast-off, ISRO also achieved the milestone of its 50th rocket launch out of Sriharikota.

Besides launching the six Singaporean satellites, ISRO also tested the rocket’s fourth stage/engine’s ability to restart after it was cut off around 17 minutes into the flight.

Technically speaking, India was testing a multiple burn fuel stage/rocket engine for the first time.

“The restart and shut off of the fourth stage engine is done as a first step towards launching multiple satellites but in different orbits,” an ISRO official told IANS, declining to be named.

Launching multiple satellites with a single rocket is nothing new for ISRO and it has been doing that for several years now. The challenge is, however, to put several satellites into different orbits with one rocket.

This is what ISRO plans to test when the PSLV-CA ejects the six Singaporean satellites.

The PSLV rocket is a four-stage/engine rocket powered by solid and liquid fuel alternatively.

“Restarting a rocket engine soon after it is shut off is a critical technology that has to be mastered. Once a rocket engine is activated, then the heat generated is very high. The trick is to cool it down in space and to restart it after a short gap,” an industry expert said.

“This is entirely different from switching on and off the communication satellite’s engines in space. The interval between two restarts of a communication satellite engine will be in days. But in the case of restarting a rocket engine, the time gap will be in hours,” the expert added.

“By that time, the rocket’s engine has to be cooled down. This part of the experiment is very critical,” he explained.

The PSLV’s fourth stage/engine will be restarted just over 67 minutes into the flight or 50 minutes after the engine was cut off.

At the time of restart, the fourth stage will be in a lower altitude of 523.9 km while the satellites would have been ejected at 550 km altitude.

The engine will be operated for four seconds and is planned to go up to an altitude of 524 km before it is cut off again.

In December 16 blast-off, ISRO is using the ‘core alone’ variant of the PSLV rocket. The rocket did not have the strap-on boosters, its standard feature.

With the successful launch of the six Singaporean satellites, ISRO has put a total of 57 foreign satellites into space.

Out of the six satellites, the 400 kg earth observation satellite called TeLEOS-1 is the main passenger for the PSLV rocket and hence the mission is called TeLEOS mission by ISRO.

TeLEOS-1 is Singapore’s first commercial earth observation satellite designed and developed by ST Electronics.

The other five co-passenger satellites are VELOX-C1 (123 kg), VELOX-II (13 kg), Kent Ridge-1 (78 kg), Galassia (3.4 kg) and Athenoxat-1.

The December 16 mission is the last launch mission for ISRO in 2015.

So far in 2015, ISRO has launched 14 satellites (three Indian and 11 foreign) from its rocket port in Sriharikota. Thirteen satellites were launched with PSLV rocket and one communication satellite — GSAT-6 — with geosynchronous satellite launch vehicle (GSLV).

Last month, India also launched its communication satellite GSAT-15 using the Ariane rocket of the European space agency which takes the total number of satellite launches in 2015 to 21 (17 foreign, four Indian).(IANS, Image: thecampusconnect)

Click here for reuse options!
Copyright 2015 NewsGram

Next Story

Quantum Technology is The New Limit of Indian Scientists

The scheme, DST says, "promises to revolutionise the future computation and communication systems which will ultimately have huge impact on the nation and our society as a whole".

0
Thanks to government funding, Indian physicists are preparing for a deep dive into the quantum world that holds the secrets for developing exciting technologies for computing, communication, cryptography and many more.
Quantum-Representational Image,

Thanks to government funding, Indian physicists are preparing for a deep dive into the quantum world that holds the secrets for developing exciting technologies for computing, communication, cryptography and many more.

Schemes for making India a major player in quantum technologies were deliberated during a five-day international conference on “Quantum Frontiers and Fundamentals” at the Raman Research Institute (RRI) here.

Sponsored by the John Templeton Foundation, the philanthropic organisation in the US, it was attended by eminent physicists from India and abroad, including several research students from India with a total number of around 100 participants, reflecting the significant growth in the research community in this area in our country.

“This is an interesting conference, blending quantum fundamentals aspects with applications, and is unique in its mandate as we have tried to provide equal emphasis to both theoretical research and experimental quantum technologies,” Urbasi Sinha, of RRI and organiser of the conference, told this correspondent. Dipankar Home of the Bose Institute, Kolkata, and Alexandre Matzkin of the French National Center for Scientific Research (CNRS) in Paris were the co-organisers.

Quantum physics is a basic theory in physics that deals with the behaviour of matter and light on the atomic and subatomic scale. Quantum technology exploits the weird properties of quantum mechanics — especially quantum entanglement, quantum superposition and quantum tunnelling — into practical applications for computing, cryptography and “secure” communication. Quantum computers that process “quantum data” (instead of binary data) are predicted to be faster than today’s largest classical computer.

Research in these areas at Indian laboratories has received a boost with promised funding support from the government’s Department of Science and Technology (DST) and the Indian Space Research Organisation (ISRO), as well as small individual projects from the Defence Research and Development Organisation and the Prime Minister’s Office.

The DST’s Mission-Mode scheme, called “Quantum Science and Technology (QuST)”, will fund research “for the development and demonstration” of quantum computers, quantum communication and cryptography, besides “demonstration of quantum teleportation”.

The scheme, DST says, “promises to revolutionise the future computation and communication systems which will ultimately have huge impact on the nation and our society as a whole”.

The DST initiative has received overwhelming response and “has already received 128 proposals from researchers from different parts of the country,” Rajeev Sharma, a spokesperson for the scheme at DST, told this correspondent. “Funding is no problem,” he said.

ISRO, in collaboration with RRI, has initiated a mega project called “Quantum Experiments Using Satellite Technology (QUEST)”. Sinha, along with members of her “Quantum Information and Computing Lab” and theory colleagues at RRI, will play a key role in developing these technologies in the coming years, with support from ISRO.

Schemes for making India a major player in quantum technologies were deliberated during a five-day international conference on "Quantum Frontiers and Fundamentals" at the Raman Research Institute (RRI) here.
Quatum Tech to get a boost in India, Pixabay

“Once RRI is ready with an experimental payload, we will launch it on board one of our satellite missions,” M. Sankaran, deputy director of ISRO Satellite Centre in Bengaluru and one of the conference participants, told this correspondent.

According to Sinha, one of her first experiments “will be a collaborative effort with the ‘Quantum Photonics Lab’ at Ontario’s University of Waterloo” that will aim to establish “a secure Quantum Key Distribution link” between India and Canada.

“It is good that both DST and ISRO have decided to fund research in this important area,” said Arun Kumar Pati, a leading researcher in quantum physics at the Harish Chandra Research Institute in Allahabad and a conference participant. “We are 10 years behind and have to catch up.”

Also Read: itel pips Samsung, Turns Fastest Growing Brand in Bangladesh 

Using its world’s first quantum satellite called “Micius”, China had already demonstrated transmission of images from the country to Austria and researchers at the National University of Singapore had built a nano-satellite with a quantum communication payload. Scientists of the University of Waterloo have also demonstrated the first quantum key distribution transmissions from a ground transmitter to a quantum payload on a moving aircraft.

The conference suggested the formation in India of a society for quantum information scientists. It also called for greater thrust to experimental research and an increase in the pool of researchers in the area of quantum technologies. (IANS)