India successfully launches communication satellite in textbook style

August 27, 2015

Sriharikota (Andhra Pradesh), Aug 27: India successfully launched its communication satellite GSAT-6, which has several strategic applications, in textbook style on Thursday using its heavy rocket geosynchronous satellite launch vehicle (GSLV-D6).

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The GSLV rocket, with a cryogenic engine, slung the satellite in a geosynchronous transfer orbit (GTO) from where it would be taken up to its final geostationary orbit.

The successful flight of GSLV rocket gives the Indian space programme a much-needed booster as getting the more-efficient cryogenic engine (which provides more thrust for every kilogram of propellant burnt) right is important for its future space programmes.

Indian space scientists have spent around two decades in conceiving the cryogenic technology and spent around Rs.400 crore in developing it.

Precisely at 4.52 p.m., the Geosynchronous Satellite Launch Vehicle-Development 5 (GSLV D6) rose from the second launch pad here at Satish Dhawan Space Centre.

The 49.1 metre tall rocket weighing 416 tonnes slung the 2,117 kg GSAT-6 communication satellite in the geosynchronous transfer orbit (GTO) around 17 minutes into the flight.

As the whole mission concluded successfully, ISRO scientists at the mission control centre were visibly happy, back-slapping and hugging each other once the rocket ejected the GSAT-6 satellite into the intended orbit.

Speaking about the launch, ISRO chairman A.S.Kiran Kumar said: "Today's performance of launch vehicle was normal. The intricacies of cryogenic engine has been understood."

This is the first successful GSLV rocket launch that placed a satellite in orbit in Kiran Kumar's tenure.

The Indian space agency flew the GSLV rocket with its own cryogenic engine for the second time on Thursday after the successful launch of a similar rocket in January 2014 that put into orbit GSAT-14.

This was the second mission of GSLV during the last five years after two such rockets failed in 2010.

One of the GSLV rockets flew with Indian cryogenic engine and the other one with a Russian engine.

The GSLV is a three stage/engine rocket. The core of first stage is fired with solid fuel while the four strap-on motors by liquid fuel. The second is the liquid fuel and the third is the cryogenic engine.

For the country, ISRO's perfection of cryogenic engine technology is crucial as precious foreign exchange can be saved by launching communication satellites by itself.

Currently ISRO flies its heavy communication satellites by European space agency Ariane.

ISRO officials told IANS earlier that the country pays around $85-90 million or around Rs.500 crore as launch fee for sending up a 3.5 tonne communication satellites. The cost of satellite is separate.

The ISRO can send smaller communication satellites - weighing around two tonnes - till such time it gets ready an advanced GSLV variant-GSLV-Mark III- that can lug satellites weighing around four tonnes.

The space agency will be launching satellites like GSAT-7, 9 using a similar rocket.

One of the notable aspect of the successful launch is the rocket's weight lift capacity. The current GSLV rocket that ISRO flies has a carrying capacity of around 2.2 tonnes.

Earlier attempts to carry slightly over two tonne satellite ended in partial/total failures.

The GSAT-6 is India's 25th geostationary communication satellite and twelfth in the GSAT series.

Five of GSAT-6's predecessors were launched by GSLV during 2001, 2003, 2004, 2007 and 2014 respectively.

After its commissioning, GSAT-6 will join the group of India's other operational geostationary satellites.

The satellite provides communication through five spot beams in S-band and a national beam in C-band for strategic users.

One of the advanced features of GSAT-6 satellite is its S-Band Unfurlable Antenna of six metre diameter - the largest satellite antenna realised by ISRO. This antenna is utilised for five spot beams over the Indian mainland, which exploit the frequency reuse scheme to increase frequency spectrum utilisation efficiency.

The satellite's life expectancy is nine years.

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News Network
May 8,2024

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Nearly 80 Air India Express flights were canceled after the cabin crew members went on a "mass sick leave", official sources said on Wednesday.

As many as 79 international and domestic flights were canceled after about 300 senior cabin crew members reported sick at the last minute and switched off their mobile phones.

The Air India Express management is currently trying to reach out to the crew, who are protesting against the new employment term at the Tata Group-owned airline, sources said.

The cabin crew has also alleged that there was a lack of equality in the treatment of the staff after the merger with Tata Group. They claim that some staff members were offered lower job position despite clearing interviews, sources said.

"A section of our cabin crew has reported sick at the last minute, starting last night, resulting in flight delays and cancellations. While we are engaging with the crew to understand the reasons behind these occurrences, our teams are actively addressing this issue to minimise any inconvenience caused to our guests as a result," an Air India Express spokesperson said.

"We sincerely apologise to our guests for this unexpected disruption and emphasise that this situation does not reflect the standard of service we strive to provide," the spokesperson added.

Guests impacted by cancellations will be offered a full refund or complimentary rescheduling to another date, the airline said.

Several passengers took to their social media accounts and complained about the sudden cancellations of their flights. They said that they had "no information" about the cancellations.

Some "very disappointed" passengers on X said that they had reached the airport when they were informed that their flights were canceled.

"We apologise for any inconvenience. Please be informed that your flight has been canceled due to operational reasons," Air India Express said in response to one of the posts on X.

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News Network
April 25,2024

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Electronics Corporation of India Ltd and Bharat Electronics Ltd have refused to disclose the names and contact details of the manufacturers and suppliers of various components of EVMs and VVPATs under the RTI Act citing "commercial confidence", according to RTI responses from the PSUs to an activist.

Activist Venkatesh Nayak had filed two identical Right To Information applications with the ECIL and BEL, seeking the details of the manufacturers and suppliers of various components used in the assembling of the electronic voting machines (EVMs) and voter-verifiable paper audit trail (VVPATs).

The VVPAT is an independent vote verification system which enables electors to see whether their votes have been cast correctly.

The ECIL and the BEL, public sector undertakings under the Ministry of Defence, manufacture EVMs and VVPATs for the Election Commission.

Nayak also sought a copy of the purchase orders for the components from both PSUs.

"Information sought is in commercial confidence. Hence details cannot be provided under Section 8(1)(d) of the RTI Act," BEL said in its response.

A similar response was sent by ECIL which said the details requested are related to a product which is being manufactured by ECIL, and third party in nature.

"Disclosing of details will affect the Competitive position of ECIL. Hence, Exemption is claimed under section 8(1) (d) of RTI ACT, 2005," it said.

In response to the purchase order copies, ECIL's central public information officer said the information is "voluminous" which would disproportionately divert the resources of the Public Authority.

"Further, the information will give away the design details of EVM components. The same may pose a danger to the machines produced. Hence, the exemption is claimed U/s 7(9) and under section 8(1)(d) of RTI Act, 2005," ECIL said.

Section 8(1)(d) of the RTI Act exempts from disclosure the information, including commercial confidence, trade secrets or intellectual property, the disclosure of which would harm the competitive position of a third party, unless the competent authority is satisfied that larger public interest warrants the disclosure of such information.

Section 7(9) of the Act says the information shall ordinarily be provided in the form in which it is sought unless it would disproportionately divert the resources of the public authority or would be detrimental to the safety or preservation of the record in question.

"I don't know whose interests they are trying to protect against the right to know of close to a billion-strong electorate. ECIL said that disclosure of the purchase orders will reveal the design details of the components and this may pose a danger to the machines produced. ECIL did not upload even a signed copy of its reply on the RTI Online Portal," Nayak said.

He said it is reasonable to infer that the two companies are not manufacturing every single item of the EVM-VVPAT combo or else the two companies would have replied that they are manufacturing all these components internally without any outsourcing being involved.

"But the electorate is expected to take everything about the voting machines based on what the ECI is claiming in its manuals and FAQs," Nayak said.

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News Network
May 8,2024

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Congress leader Sam Pitroda has stepped down from the post of Chairman of the Indian Overseas Congress and his resignation was accepted by the party. Congress leader Jairam Ramesh took to X and announced that Sam Pitroda had decided to resign from the key post "of his own accord".

Pitroda had been under fire over his controversial remark that Indians in the East resemble the Chinese while those in the South look like Africans.

"We could hold together a country as diverse as India -- where people on East look like Chinese, people on West look like Arab, people on North look like maybe White and people in South look like Africans. It doesn't matter. We are all brothers and sisters," Pitroda said during an interview with The Statesman.

The Congress immediately distanced itself from Pitroda's remarks, terming them "unacceptable".

"The analogies drawn by Mr Sam Pitroda in a podcast to illustrate India's diversity are most unfortunate and unacceptable. The Indian National Congress completely dissociates itself from these analogies," Jairam Ramesh said in a post on X.

The BJP also hit out at the Congress over Pitroda's remarks and termed them "racist and divisive".

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