Indian Space Program Discussion

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Re: Indian Space Program Discussion

Postby PratikDas » 29 Sep 2012 03:07

Successful separation of both payloads from Ariane 5. Congratulations!


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Re: Indian Space Program Discussion

Postby TSJones » 29 Sep 2012 07:52

SSridhar wrote:India aborts human moon mission - Dr. Ajay Lele


I think the comments in Space Review to Dr. Lele's article were way too negative. It's a shame that certain people feel this way about India's space prgram. India's space program doesn't cost that much relative to it's defense program, etc. And they completely over look the technological benefits that it brings, yes, even to poor people! The fact is, India needs to build upon its space infrastructure and have a 24x7 presence in space. I think it is in process of doing so, all be it slowly, they are doing what they can afford. I have every confidence that India will build a more powerful rocket and continue to make progress for a better future for all of its citizens. Nobody is making anymore land on earth, the future is in space.

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Re: Indian Space Program Discussion

Postby member_23694 » 29 Sep 2012 09:05

First congrats to ISRO for GSAT - 10 :D

TSJones wrote:It's a shame that certain people feel this way about India's space prgram


There is a difference in being negative and upset because of the dream that ISRO made us to see.
All the deadlines that they had set have simply gone for a toss.
My only request for ISRO is that at least some part of the budget each year they keep for space exploration treating it as an Adventure rather than as a social service job.
Here for all the areas where we do not reach our real potential we find a convinient excuse in Garibi, low budget, social service etc

ISRO has lot more potential and can reach there only thing missing is some amount of adventurism (currently too safe and conservative and fear of failure)

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Re: Indian Space Program Discussion

Postby Singha » 29 Sep 2012 09:06

Its a common thing. Brits even claim their "aid" subsidizes our space program

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Re: Indian Space Program Discussion

Postby chiragAS » 29 Sep 2012 10:45

dhiraj wrote:ISRO has lot more potential and can reach there only thing missing is some amount of adventurism (currently too safe and conservative and fear of failure)


For a country which has DDM coming up with gems like Flying Coffins, and CAG coming up with numbers like xxx Lakh crore loss for country etc, do you really think ISRO has any other option than being conservative. :roll:

besides Lot of ground systmes from Deep space network to High altitude test facilities to simulating micro gravity test facilities to repairing the fragmented managment inside ISRO needs to be addressed. It takes time to build new facilities, some of which no indian private players have any experience which ISRO can bank upon for faster execution. IMO once these are addressed ISRO will be able to move at a faster pace.
IMO in the mean while folks at parliament should get this auction/bidding routes policy clarified. half of the time ISRO must be sitting with tonnes of paper work to adhere to rules which if they make a mistake CAG and other bodies will hunt them to death.
maintaining these paper work takes more time than building rockets. (IMO only)

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Re: Indian Space Program Discussion

Postby TSJones » 29 Sep 2012 11:06

dhiraj wrote:First congrats to ISRO for GSAT - 10 :D

TSJones wrote:It's a shame that certain people feel this way about India's space prgram


There is a difference in being negative and upset because of the dream that ISRO made us to see.
All the deadlines that they had set have simply gone for a toss.
My only request for ISRO is that at least some part of the budget each year they keep for space exploration treating it as an Adventure rather than as a social service job.
Here for all the areas where we do not reach our real potential we find a convinient excuse in Garibi, low budget, social service etc

ISRO has lot more potential and can reach there only thing missing is some amount of adventurism (currently too safe and conservative and fear of failure)


I think the Mars mission is going to happen and furthermore I think ISRO has been working on it even before before it was released to the news media. I think it is an example of "adventureous" thinking and action! When it happens India will be among the select few who have dared.

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Re: Indian Space Program Discussion

Postby member_23694 » 29 Sep 2012 12:09

chiragAS wrote:maintaining these paper work takes more time than building rockets


hmm...i think i agree with this statement. But then here is where an individual get an opportunity to show hisleadership quality. Either one gets influenced by the fear of other agencies and frame there activities accordingly or one could make his own way and convince others to follow that path and understand the ultimate benefit that it will provide to the country both in terms of technology and recognition.
And if this is the path that our past leader would have followed then we would never had an ISRO / DRDO / IITs/IIMs/BARC etc since when they were created India's economy was in a much worse shape than today.
And IMO if someone wants to frame someone then it is the easiest job here as there have been N number of such examples one within ISRO itself right ?


TSJones wrote:I think the Mars mission is going to happen and furthermore I think ISRO has been working on it even before before it was released to the news media. I think it is an example of "adventureous" thinking and action! When it happens India will be among the select few who have dared.


Yes MARS mission is good , I never deny it but is it really what should have been the priority when our launch vehicle capability putting very mildly is not in very good shape. We are not developing technology fast enough for a reliable and powerful launch vehicle capability and IMO if we want to conduct some quality deep space exploration then first we need a vehicle to carry the such payload

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Re: Indian Space Program Discussion

Postby chiragAS » 29 Sep 2012 13:09

dhiraj wrote:
chiragAS wrote:maintaining these paper work takes more time than building rockets


hmm...i think i agree with this statement. But then here is where an individual get an opportunity to show hisleadership quality. Either one gets influenced by the fear of other agencies and frame there activities accordingly or one could make his own way and convince others to follow that path and understand the ultimate benefit that it will provide to the country both in terms of technology and recognition.
And if this is the path that our past leader would have followed then we would never had an ISRO / DRDO / IITs/IIMs/BARC etc since when they were created India's economy was in a much worse shape than today.
And IMO if someone wants to frame someone then it is the easiest job here as there have been N number of such examples one within ISRO itself right ?


I agree that is where leadership comes to picture. But having leadership in ISRO alone wont be enough. We need leadership shown at Delhi too. In the past, great leaders in ISRO combined with full backing from Delhi helped. Not that i am accusing current GoI of not backing ISRO, but if half of the politicos are on Dharna and sitting outside Parliament. how can you get files cleared for critical ISRO related work. If something affects Delhi. it will have its effects on ISRO too. After all ISRO is a government body. We need leadership right from Delhi to ISRO.

And IMO if someone wants to frame someone then it is the easiest job here as there have been N number of such examples one within ISRO itself right ?


I agree to this. but framing is not just from within. There are lot of foreign agencies who are at play to trouble India's growth story. if you see the pattern eg. protests at Kudankulam atomic plant to trouble in Delhi. That is the reason we need leadership at Delhi too. IMO we are both on same page i guess.. :)

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Re: Indian Space Program Discussion

Postby chiragAS » 29 Sep 2012 13:13

wish Aditya-1 could have been launched by now. :(

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Re: Indian Space Program Discussion

Postby member_23694 » 29 Sep 2012 13:29

chiragAS wrote:IMO we are both on same page i guess..


definitely we are on the same page :D

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Re: Indian Space Program Discussion

Postby vasu raya » 29 Sep 2012 21:03

ISRO did a course correction on the cryogenic engine development by establishing the high altitude test facility after the first failure, its a commendable effort given the limited budget

why is the same seriousness not shown in the Kaveri engine case in establishing local 'Gromov' kind of test facility?

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Re: Indian Space Program Discussion

Postby nakul » 29 Sep 2012 21:26

Mangalyaan

Image

If all goes as per plan, India plans to launch, in 2013, its maiden mission to Mars. Called Mangalyaan, it will be an unmanned orbiting mission to study the atmosphere of the Red Planet. Dr Radhakrishnan says "work is going on at a feverish pace for this mission that will reinforce India's national pride".


Mission Objectives

One of the main objectives of the first Indian mission to Mars is to develop the technologies required for design, planning, management and operations of an interplanetary mission comprising the following major tasks.

    Orbit maneuvers to transfer the s/c from Earth-centered orbit to heliocentric trajectory and finally capture into Martian orbit

    Development of force models and algorithms for orbit and attitude computations and analyses

    Navigation in all phases

    Maintain the s/c in all phases of the Mission meeting Power, Communications, Thermal and Payload operation requirements

    Incorporate autonomous features to handle contingency situations

    The Mars Orbiter s/c is planned to be launched by PSLV.

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Re: Indian Space Program Discussion

Postby SSridhar » 30 Sep 2012 08:25

GAGAN to deliver seamless air navigation by 2013 Madhumathi in The Hindu
Sometime in mid-2013, flyers on the Bangalore-Delhi route may be arriving at their destination 15-20 minutes ahead of schedule. Aircraft need not go zigzag but may go almost as the crow flies and burn less fuel and money. Airports can see less congestion, and fog may become a lesser evil.

It is not a miracle in the skies but when it happens, it will be thanks to Gagan, the country’s space-based GPS augmentation system.
Now that the country’s second Gagan payload is up with the latest communications satellite GSAT-10, Gagan will be made operational in June or July 2013, according to a senior Airports Authority of India (AAI) official.
The Directorate General of Civil Aviation is expected to certify the system by the middle of next year, after which the services will roll out
The AAI and ISRO have jointly developed the three-antenna Gagan worth Rs.770 crore. The first payload was put up in 2011 on GSAT-8 and the third will be sent up in the coming months on GSAT-9.

The now ubiquitous GPS, a U.S. military system that is being shared globally, however, shows many inaccuracies, which Gagan has fine-tuned and made a lot more reliable and hence safe for lives, he said. Small town airports need not invest in ground instruments such as the instrument landing system.

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Re: Indian Space Program Discussion

Postby member_23832 » 30 Sep 2012 11:03

I agree, the mars mission is in planning for along and hence they were well prepared once the approval came through from
Govt. There is definetely a big push within ISRO for this mission to happen in 2013. If all goes well then we will have a indian spacecraft orbting Mars in latter part of 2014, the first by an asian spacecraft to be captured by mars orbit. That will lift the spirts of ISRO, and earse the bad memories of its rocket failures. The success will also make ISRO to look beyond mars for which the heavy rockets like GSLV mk2 and 3 need to be perfected.

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Re: Indian Space Program Discussion

Postby nakul » 30 Sep 2012 12:25

There might be another angle to it. China has been pursuing manned exploration of space. They have a lead over there. While we are already quite advance in unmanned expeditions. This will look less like catching up and more innovative. Many countries have tried but IIRC only US has managed to enter a body in martian orbit.

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Re: Indian Space Program Discussion

Postby member_23832 » 30 Sep 2012 13:49

"Space agency would use its Polar Satellite Launch Vehicle rocket to place the Mangalyaan satellite in orbit.[7] The agency is also considering using ion-thrusters, liquid engines or nuclear power to propel the bus further towards Mars"

Which propulsion ISRO is considering for their mars mission..??...any possibility of using Ion-thrusters, way back during the design stage of Chandryaan-1, Mr. Madhavan nair was contemplating of developing nuclear propulsion with BARC.

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Re: Indian Space Program Discussion

Postby vasu raya » 01 Oct 2012 00:09

Does ISRO/Antrix charge airlines for GAGAN service? however nominal it maybe

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Re: Indian Space Program Discussion

Postby merlin » 02 Oct 2012 10:46

vasu raya wrote:Does ISRO/Antrix charge airlines for GAGAN service? however nominal it maybe


Don't think so. Its not an encrypted signal so anyone is free to receive it, besides its GPS augmentation not GPS itself.

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Re: Indian Space Program Discussion

Postby TSJones » 03 Oct 2012 20:14

Well, there's airport landing fees, safety and inspection fees, commercial airlines operations license and fees, jet fuel taxes, etc. Where there's a will there's a way.

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Re: Indian Space Program Discussion

Postby SSridhar » 04 Oct 2012 12:40

GSAT-10 is almost home
Communication satellite GSAT-10 was placed in geosynchronous orbit on Wednesday and is a few days away from reaching its final slot, the Indian Space Research Organisation said in a release.

Scientists at ISRO’s Master Control Facility at Hassan in Karnataka conducted the third and final orbit-raising manoeuvre on Wednesday morning. Subsequently, they deployed two solar panels to generate power for the satellite’s functions and the two dual gridded reflector antennas to establish a communication link with the ground station.

Now, it has an orbit with a 35,734-km apogee (farthest point in the orbit from earth), a 35,585-km perigee (nearest point from earth) and an orbital period of approximately 23 hours 50 minutes.

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Re: Indian Space Program Discussion

Postby symontk » 04 Oct 2012 18:37

http://newindianexpress.com/cities/thiruvananthapuram/article1284586.ece

Sounding rockets will be launched specially for the public on October 7 through 9 from Thumba as part of the World Space Week-2012 (WSW-2012) celebrations.

The RH 200 sounding rockets will be used for the purpose, officials of the Vikram Sarabhai Space Centre (VSSC) said. The rockets will be launched at 3 pm on October 7, 8 and 9. VSSC will be open to the public on all three days.

Special passes for viewing the launches will be available at the Canal Gate near Station Kadavu from 9.30 am to 2 pm. Visitors should carry an ID card and electronic items are not allowed inside. Umbrellas, water and other refreshments are allowed.

Dr V N Rajasekharan Pillai, executive vice-president of the Kerala State Council for Science, Technology and Environment, will launch the WSW-2012 celebrations at 10 am on Thursday

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Re: Indian Space Program Discussion

Postby SSridhar » 06 Oct 2012 09:40

GSAT-10 is a success, but ISRO needs to advance its launch capabilities - IDSA comment by Ajay Lele
Excerpts
It is actually the failure to develop a fully reliable GSLV launcher to place heavy satellites in the geostationary orbit that is restricting the rapid growth of India’s space prowess. India has been testing the GSLV since 2001. Out of seven launches till date, only two have been fully successful. One of the major reasons for the delay in India’s second moon mission (Chandrayaan-2) is the absence of a reliable GSLV. Further, the absence of a GSLV is also affecting India’s strategic preparedness because India cannot launch satellites required for strategic purposes from a foreign launch pad or atop a foreign rocket.

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Re: Indian Space Program Discussion

Postby vasu raya » 06 Oct 2012 10:11

My wish is since the slow moving Dhanush's launch and stabilization issues are solved, they should be scaled to let PSLV class space rocket to be fired from a ship, read Viraat, while I don't think we are taking that direction given GSLV and future RLV efforts, scaling the number of launches with private sector involvement would mean you got funds for a sea launch initiative and due to increased payload capability there is more profit in it for them.

And then there is also a dire need for system on chip initiative for the Sat. program to make them more compact

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Re: Indian Space Program Discussion

Postby Vipul » 06 Oct 2012 22:55

ISRO to launch 14 communication satellites by 2017.

Faced with a massive demand for transponders, India plans to launch 14 communication satellites by 2017. The Department of Space (DoS) has projected demand for 794 transponders in the 12th plan (2012-2017) from the operational transponder capacity of 187 from INSAT-GSAT satellites as of March-end this year.

These proposed 14 spacecraft, including high power S-band satellite for mobile communications and new generation geo-imaging satellite, are aimed at increasing the transponder capacity and introducing new generation broadband VSAT systems and Ka band systems.

These satellites would bridge the gap between the demand and supply of the transponders to meet all the requirements of the country and also to maintain sufficient spares capacity to meet contingencies, sources in Indian Space Research Organisation, R&D wing of the Department of Space, said.

"Maintaining and securing sufficient orbit-spectrum resources for country’s Satcom activities will be a thrust area of the 12th Plan", an ISRO official said, quoting the 12th plan proposals of DoS. "It has been planned to pursue rigorously to secure spectrum for 100 additional Ku-band transponders and around 50 C-band/Ext C-band transponders in newer orbital locations".

During the 12th Plan period, 16 PSLV missions, six GSLV MK-II missions and two GSLV MK-III missions (including one experimental mission) are planned to be accomplished.

In addition, initiatives such as new satcom policy, space legislation and space navigation policy are proposed to be put in place to facilitate the growth and development of space science and technology in the country.

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Re: Indian Space Program Discussion

Postby vasu raya » 06 Oct 2012 23:38

There was a recent article on trifurcating ISRO's functions, R&D for science, Rocket propulsion & production and probably a Commercial arm

while composite casing of rocket stages improves their performance, we haven't yet seen PSLV incorporate it :((

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Re: Indian Space Program Discussion

Postby member_23832 » 07 Oct 2012 10:20

India poised for giant leap in space science, 56% jump in collaboration with US, France, Russia

NEW DELHI: India may have taken a giant leap into the hallowed club of space research, with leaders like the United States and Russia, increasingly joining hands with Indian space scientists in quest for the unknown. Latest data on India's international collaboration in space sciences has shown an almost 56% increase between 2001-05 and 2006-10.

Between 2001 and 2005, 629 publications were internationally co-authored between Indian and international space scientists. The output increased to almost 980 publications by 2006-10 — a growth of 55.8% in raw volume.

These internationally co-authored publications, which contributed to 45.2% of India's total research output in 2001-05 increased to 47.1% by 2006-10.

The analysis, done by Thomson Reuters and submitted to the ministry of science and technology, says these levels of international cooperation are the highest among all the fields under analysis. The US was India's most frequent collaborating partner in this field with American researchers co-authoring 465 publications with their Indian counterparts — 22.3% of India's total research output in space science.

France was the second most important collaborating partner with India, co-authoring 206 publications with Indian researchers in 2006-10. France accounted for 9.9% of India's total research output in this field, an increase of 1.7% since 2001-05.

Collaborating in space science as percentage of India's total research output in this field also increased with the UK (+0.8%) and Germany (+1.4%), Russia (+1.9%), Spain (+1.4%), Australia (+0.7%) and the Netherlands (+0.7%). Collaboration has increased substantially across the board with all major countries.

Consider the case of Russia. Indian and Russian space scientists co-authored 29 papers between 2001 and 2005, and the output increased to 82 papers between 2005 and 2010. Ditto for Germany. As against 98 papers co-authored in 2001-05, the output rose to 175 in 2006-10.

Similarly, with the UK, the output increased from 107 to 177 during the same period, Italy (from 83 to 119), the US (from 316 to 465), Spain (from 45 to 96), Japan (from 80 to 109), France (from 114 to 206) and Australia (from 51 to 91).

According to the Planning Commission, the 11th five year Plan witnessed significant progress in international cooperative endeavours in space science.

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Re: Indian Space Program Discussion

Postby chiragAS » 07 Oct 2012 10:31

avinodhin wrote:India poised for giant leap in space science, 56% jump in collaboration with US, France, Russia

NEW DELHI: India may have taken a giant leap into the hallowed club of space research, with leaders like the United States and Russia, increasingly joining hands with Indian space scientists in quest for the unknown. Latest data on India's international collaboration in space sciences has shown an almost 56% increase between 2001-05 and 2006-10.

Between 2001 and 2005, 629 publications were internationally co-authored between Indian and international space scientists. The output increased to almost 980 publications by 2006-10 — a growth of 55.8% in raw volume.

These internationally co-authored publications, which contributed to 45.2% of India's total research output in 2001-05 increased to 47.1% by 2006-10.

The analysis, done by Thomson Reuters and submitted to the ministry of science and technology, says these levels of international cooperation are the highest among all the fields under analysis. The US was India's most frequent collaborating partner in this field with American researchers co-authoring 465 publications with their Indian counterparts — 22.3% of India's total research output in space science.

France was the second most important collaborating partner with India, co-authoring 206 publications with Indian researchers in 2006-10. France accounted for 9.9% of India's total research output in this field, an increase of 1.7% since 2001-05.

Collaborating in space science as percentage of India's total research output in this field also increased with the UK (+0.8%) and Germany (+1.4%), Russia (+1.9%), Spain (+1.4%), Australia (+0.7%) and the Netherlands (+0.7%). Collaboration has increased substantially across the board with all major countries.

Consider the case of Russia. Indian and Russian space scientists co-authored 29 papers between 2001 and 2005, and the output increased to 82 papers between 2005 and 2010. Ditto for Germany. As against 98 papers co-authored in 2001-05, the output rose to 175 in 2006-10.

Similarly, with the UK, the output increased from 107 to 177 during the same period, Italy (from 83 to 119), the US (from 316 to 465), Spain (from 45 to 96), Japan (from 80 to 109), France (from 114 to 206) and Australia (from 51 to 91).

According to the Planning Commission, the 11th five year Plan witnessed significant progress in international cooperative endeavours in space science.


Where is the Source link. It seems you have copied it from some newspaper and pasted it in whole without giving credit to the source.

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Re: Indian Space Program Discussion

Postby symontk » 07 Oct 2012 13:39

vasu raya wrote:There was a recent article on trifurcating ISRO's functions, R&D for science, Rocket propulsion & production and probably a Commercial arm

while composite casing of rocket stages improves their performance, we haven't yet seen PSLV incorporate it :((


PSLV already has composite casing for its 3rd stage. Its done by DuPont fibres known as KEVLAR. For launch vehicles like PSLV, saving weight in the first stages will not improve any payload capacity. If you save 100tons in the first stage of PSLV, you would be able to add 1 ton more to the satellite

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Re: Indian Space Program Discussion

Postby member_23832 » 07 Oct 2012 14:21

chiragAS wrote:
avinodhin wrote:India poised for giant leap in space science, 56% jump in collaboration with US, France, Russia

NEW DELHI: India may have taken a giant leap into the hallowed club of space research, with leaders like the United States and Russia, increasingly joining hands with Indian space scientists in quest for the unknown. Latest data on India's international collaboration in space sciences has shown an almost 56% increase between 2001-05 and 2006-10.

Between 2001 and 2005, 629 publications were internationally co-authored between Indian and international space scientists. The output increased to almost 980 publications by 2006-10 — a growth of 55.8% in raw volume.

These internationally co-authored publications, which contributed to 45.2% of India's total research output in 2001-05 increased to 47.1% by 2006-10.

The analysis, done by Thomson Reuters and submitted to the ministry of science and technology, says these levels of international cooperation are the highest among all the fields under analysis. The US was India's most frequent collaborating partner in this field with American researchers co-authoring 465 publications with their Indian counterparts — 22.3% of India's total research output in space science.

France was the second most important collaborating partner with India, co-authoring 206 publications with Indian researchers in 2006-10. France accounted for 9.9% of India's total research output in this field, an increase of 1.7% since 2001-05.

Collaborating in space science as percentage of India's total research output in this field also increased with the UK (+0.8%) and Germany (+1.4%), Russia (+1.9%), Spain (+1.4%), Australia (+0.7%) and the Netherlands (+0.7%). Collaboration has increased substantially across the board with all major countries.

Consider the case of Russia. Indian and Russian space scientists co-authored 29 papers between 2001 and 2005, and the output increased to 82 papers between 2005 and 2010. Ditto for Germany. As against 98 papers co-authored in 2001-05, the output rose to 175 in 2006-10.

Similarly, with the UK, the output increased from 107 to 177 during the same period, Italy (from 83 to 119), the US (from 316 to 465), Spain (from 45 to 96), Japan (from 80 to 109), France (from 114 to 206) and Australia (from 51 to 91).

According to the Planning Commission, the 11th five year Plan witnessed significant progress in international cooperative endeavours in space science.


Where is the Source link. It seems you have copied it from some newspaper and pasted it in whole without giving credit to the source.


Sorry boss, it was unintentional..find the link below here..

http://timesofindia.indiatimes.com/home ... 704448.cms

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Re: Indian Space Program Discussion

Postby member_23832 » 07 Oct 2012 14:23

Isro plans 58 space missions during 12th Plan

http://timesofindia.indiatimes.com/indi ... 708140.cms

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Re: Indian Space Program Discussion

Postby vasu raya » 07 Oct 2012 20:10

symontk wrote:PSLV already has composite casing for its 3rd stage. Its done by DuPont fibres known as KEVLAR. For launch vehicles like PSLV, saving weight in the first stages will not improve any payload capacity. If you save 100tons in the first stage of PSLV, you would be able to add 1 ton more to the satellite


well, say if GSLV was on track we would probably be talking about some of the follow on good stuff such as recovering its huge boosters parachuted into the ocean to be used in the next mission etc, however due to the delay, we should proceed with the good stuff with the existing workhorse, the PSLV

given that context, a composite 2nd stage on PSLV offers better mass fraction even if the first stage is an iffy while allowing for reuse experiments without compromising on the PSLV track record, while I don't know the effort involved, reducing the launch weight (hence propellant) significantly and increasing the payload weight by 1 ton sounds like huge optimization for both scaling the rocket production and say for Sea launch option

see the way DRDO 'thrashes' the Prithvi, maybe they can afford to as there is no commercial angle to it

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Re: Indian Space Program Discussion

Postby SSridhar » 08 Oct 2012 09:23

How GAGAN can help cut fuel cost by upto 20% - Economic Times
Today, when an aircraft takes off in Indian skies, it doesn't trace a straight vertical line to a cruising height. It, instead, rises in fits and starts, with bursts of acceleration. Likewise, between two destinations, it doesn't trace the straight line -- the shortest distance. It, instead, zigs and zags.

Both manoeuvres mean airlines end up burning more fuel than ideal because current Indian air-navigation systems don't allow for the greater accuracy and surety available in some other parts of the world. This is set to change in July, 2013, when the Airports Authority of India (AAI) launches GPS-aided GEO augmented navigation system (GAGAN). "Airlines can save 20% on their fuel costs," reckons S Sundara Raman, executive director (communication, navigation & surveillance), AAI.

Straighter Routes

GAGAN will catapult India into an elite league in air navigation: this is only the fourth such system in the world, after that of the US, European Union and Japan (see graphic). "It's an eye in the sky," says Amber Dubey partner, aviation, KPMG. "With ground-based systems (the current system), there's a need to have systems at every few kilometre. Here, one satellite tracks everything, and far more accurately."

GAGAN is a superior version of the current GPS system: it can detect activity at a finer level. So, while aircraft in India currently keep a distance of 80-100 miles, GAGAN will reduce this to 30 miles. This will allow thrice as many planes to fly, and reduce congestion on busy routes, as well as make Indian skies safer. Raman expects a six-fold increase in time. He also estimates airlines to reduce their flying time on the Delhi-Mumbai route by 10 minutes.

A senior SpiceJet technical official, speaking on the condition of anonymity, confirms that airlines don't take a straight line between two destinations. "We take pre-determined routes set by the air traffic control centre. For example, between Delhi and Bangalore, we have to take a detour over Bhopal and do a series of deviations that add up to a much longer route," he says. "After GAGAN, we will have what is called 'freedom flights', leading to reduced fuel burn by 18-20%."

GAGAN will also make Indian skies safer. For example, while landing, the current system gives an aircraft the coordinates of a landing strip in a range of 20 metres. By comparison, GAGAN will give it in a range of 20 feet, thus reducing the possibility of human error. The signals on GAGAN will be beamed by three satellites of the Indian Space Research Organisation (ISRO), located at a height of about 36,000 km. Two of these satellites have been launched. A third one is expected to be launched in 2013.

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Re: Indian Space Program Discussion

Postby geeth » 08 Oct 2012 10:18

What is going on about the GSLV Cryo engine after May 12 test..? They were supposed to launch the GSLV with Indigenous Cryo around this time. But no news yet.

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Re: Indian Space Program Discussion

Postby Varoon Shekhar » 08 Oct 2012 18:30

The launch has been pushed back to Jan-Feb 2013. Possibly December 2012. Keep fingers crossed for a successful mission!

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Re: Indian Space Program Discussion

Postby member_23658 » 09 Oct 2012 14:24

India testfires Mars mission engine:

http://timesofindia.indiatimes.com/indi ... 732473.cms

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Re: Indian Space Program Discussion

Postby Nick_S » 09 Oct 2012 19:23

SKrishna wrote:For GSLV Mk III instead of 2 large Semi cryo engines they could have used 5 or 7 smaller Vikas sized (semi cryo of course) and have the same advantage of failover recovery. Maybe ISRO could reconfigure PSLV in the future once they master the semi-cryo propulsion.


Sir, GSLV Mk III does not have semi cryo engines/stages. IIRC, the boosters are solid propellant, then there are two Vikas strapped together and upper stage is fully cryo stage.

India still has a long way to develop semi cryo engine.

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Re: Indian Space Program Discussion

Postby Varoon Shekhar » 09 Oct 2012 22:36

Amol.D wrote:India testfires Mars mission engine:

http://timesofindia.indiatimes.com/indi ... 732473.cms


Has ISRO increased the thrust/power of the LAM engine they use for the INSAT satellites. Or has the thrust stayed frozen at the 440 N level? Will the Mangalyaan LAM use a more powerful LAM?

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Re: Indian Space Program Discussion

Postby Nick_S » 10 Oct 2012 21:20

<double post>
Last edited by Nick_S on 11 Oct 2012 18:50, edited 1 time in total.

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Re: Indian Space Program Discussion

Postby ramana » 11 Oct 2012 03:35

Moved Space-X news to the Intl Military and Sapce Thread


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