Indian Space Program Discussion

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Arun_S
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Re: Indian Space Program Discussion

Post by Arun_S »

Cross post from Pok-II thread.
Arun_S wrote:Dear friends, please note that I stand by my statements on BR, and time will reveal the self evident truth. Interesting times lie ahead, and matters will become clearer as major events unfold.

It is sad to note that BRF no longer represent "Bharat" and has become a propaganda media for GoI official line; an echo-chamber lead by Shiv.

I hereby withdraw from BR and BRF.

My thanks to everybody for your support, discussions and bearing with me.

There is a real "Bharat" out there to serve, and I urge my friends to look up to it.

I ask the powers to be on BRF to leave my last post intact.

Thank you
Arun_S
KrishG
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Re: Indian Space Program Discussion

Post by KrishG »

Arun_S wrote:Cross post from Pok-II thread.
Arun_S wrote:Dear friends, please note that I stand by my statements on BR, and time will reveal the self evident truth. Interesting times lie ahead, and matters will become clearer as major events unfold.

It is sad to note that BRF no longer represent "Bharat" and has become a propaganda media for GoI official line; an eco-chamber lead by Shiv.

I hereby withdraw from BR and BRF.

My thanks to everybody for your support, discussions and bearing with me.

There is a real "Bharat" out there to serve, and I urge my friends to look up to it.

I ask the powers to be on BRF to leave my last post intact.

Thank you
Arun_S
Arun you can't do this! We have always respected your views on any topic! How can we forget your exceptional contributions, not only to the main site but exceedingly in the forums. I hope you change your mind. :( :(
kmkraoind
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Re: Indian Space Program Discussion

Post by kmkraoind »

Isro seeks Russian spaceship for manned flight
“Indian Space Research Organisation (Isro) has applied for acquiring a spaceship for sending space tourists,” Russian space agency, Roscosmos’ spokesman Alexei Krasnov said.
During President Dmitry Medvedev’s maiden India visit last year, Moscow and New Delhi inked a space accord, under which Russia will help Isro in training Indian astronauts and provide knowhow for building an indigenous spaceship for the national programme of space flights.
animesharma
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Re: Indian Space Program Discussion

Post by animesharma »

It looks more like an attempt to speed up the things. I hope its a start for their in house space ship development.
Sanjay M
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Space Tourism

Post by Sanjay M »

kmkraoind wrote:Isro seeks Russian spaceship for manned flight
“Indian Space Research Organisation (Isro) has applied for acquiring a spaceship for sending space tourists,” Russian space agency, Roscosmos’ spokesman Alexei Krasnov said.
During President Dmitry Medvedev’s maiden India visit last year, Moscow and New Delhi inked a space accord, under which Russia will help Isro in training Indian astronauts and provide knowhow for building an indigenous spaceship for the national programme of space flights.
So from the article, it sounds like India is getting into the space tourism business, which I wholeheartedly support. The more manned flights we launch, the more rapidly we can mature our platforms. I like the idea of ISRO pitching our manned spaceflight program in this way, as space tourism implies revenue-generation and self-sufficiency. We've already been making a name for ourselves in medical tourism -- why not in space tourism too? If we can offer top-notch medical procedures to those willing to put their life in our hands, then why can't we similarly offer space travel to those willing to put their life in our hands?

Antrix already makes good money from offering satellite photos, so perhaps Antrix could similarly open up a new Space Tourism division, to likewise offer up space travel for those willing to pay. Antrix can then raise its profile as a commercial provider of multi-purpose space services beyond just photos.

We definitely need to tap this high-end market, as the demand is there. It could help us to finance our advancement in the space arena.
Sanjay M
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Re: Indian Space Program Discussion

Post by Sanjay M »

Another article on ISRO's development of ion propulsion, to be tested in GSAT-4

http://www.satnews.com/cgi-bin/story.cg ... 2082474907
Gagan
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Re: Indian Space Program Discussion

Post by Gagan »

India / ISRO gets tech assistance from videshis by signing accords of cooperation.
China gets tech from the videshis by suspected unscrupulous means.

There is a difference in the national approaches of the two nations.

The association with the russians will likely involve:
1. Training of the antarikshyatris in zero gravity maneuvers.
2. The space suits for spacewalks, and tech for the same.
3. Advanced aspects of the design of the space capsule.

This is not to say that India can't go it alone. All the basic materials required are already available to India, inhouse. This appears to be a move to cut down the time to frutition, and learning from the experts in the space business.
Sanjay M
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Re: Indian Space Program Discussion

Post by Sanjay M »

I was thinking, if one had to use solar power arrays on the Moon, then why bother to land the solar infrastructure onto the Moon's surface at all? That just takes extra propellant mass and more complex landing systems. Why not just park it in lunar orbit, and just beam the power down from there? This would offer the added advantage of being able to re-direct that power to any location where it might be needed during the exploration of the lunar surface. It could also be a dry-run for doing something similar for Mars.

If you had equipment operating on the surface in the southern lunar hemisphere, then you could beam power over there. If you had equipment operating in the northern lunar hemisphere, then you could beam power over there just as easily. Beaming power from orbit gives you the flexibility of not having to rebuild your energy-collection infrastructure all over the place. Suppose you found a better surface location to live, and wanted to relocate? It would be easier if you had an orbital solar collector rather than a surface-based one, since it could re-target its power more flexibly.

The best locations to position such a solar power array might be in the L1 or L2 zones, where lunar gravity is canceled by the Earth's.

Again, I'm thinking that L1 and L2 are going to be very strategic areas of space that we need to move into, before others occupy these ahead of us and exclusively hog them for themselves.
Sanjay M
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Re: Indian Space Program Discussion

Post by Sanjay M »

Gagan wrote:India / ISRO gets tech assistance from videshis by signing accords of cooperation.
China gets tech from the videshis by suspected unscrupulous means.

There is a difference in the national approaches of the two nations.

The association with the russians will likely involve:
1. Training of the antarikshyatris in zero gravity maneuvers.
2. The space suits for spacewalks, and tech for the same.
3. Advanced aspects of the design of the space capsule.

This is not to say that India can't go it alone. All the basic materials required are already available to India, inhouse. This appears to be a move to cut down the time to frutition, and learning from the experts in the space business.

I agree that this cooperation will speed up our learning curve.

While India can use Soyuz tech in the early period, I'd really like to see us develop our own style of space vehicles. After all, some of the Russian stuff is reputed to give a rough ride.

I'd really like to see ISRO try to use graphene in the development of spacesuits, which could make such suits significantly lighter and less bulky or cumbersome. As you know, graphene has extremely high strength, and the best possible impermeability to gas. Graphene-impregnated polymers would be ideal for making stronger and lighter spacesuits, which would enable better EVA maneuvering in space by astronauts, to facilitate carrying out complex tasks like assembly of orbital platforms, etc. With a really good spacesuit, you can do a whole lot more in space.
Sanjay M
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Re: Indian Space Program Discussion

Post by Sanjay M »

Strapped for Cash, NASA Reaches for International Partners
The U.S. is not talking to just its traditional partners. There have also been recent meetings with space officials from India, which wants to orbit astronauts by 2015 but is debating whether its program's $1 billion budget is worth the cost.

"International cooperation will definitely help," said Deviprasad Karnik, the Indian Embassy's space attache in Washington.

Like India, other countries have wanted to cooperate with the U.S. for financial reasons. Stretched as it is, NASA's budget is more than the budgets of all other space agencies combined.
Bah, I can't see big things happening from their new chief Bolden. I think he might oversee a slackening of NASA's programs, with perhaps partners from the international community and private sector automatically being invited in to pick up the slack.
Sanjay M
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Re: Indian Space Program Discussion

Post by Sanjay M »

ISRO and IAF Jockeying Over 'Best Man for Space'?


I too would prefer seeing an IAF man. They have the most experience at being test pilots.
I also feel it to be a matter of honour that a member of the armed services be given first crack at it. That's how everybody does it.

What do you all think?
a_bharat
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Re: Indian Space Program Discussion

Post by a_bharat »

Sanjay M wrote:I was thinking, if one had to use solar power arrays on the Moon, then why bother to land the solar infrastructure onto the Moon's surface at all? That just takes extra propellant mass and more complex landing systems. Why not just park it in lunar orbit, and just beam the power down from there?
How does one beam power? I know there were some experiments to transmit power wirelessly -- small amounts over very small distances in lab setup.
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Re: Indian Space Program Discussion

Post by animesharma »

yeah a_bharat, the lab tested version of wireless power transfer were succesful because they had low power loss.
it is possible to transmit power from a long distance, but the only problem is high loss during the process of transmission.

However,(keeping aside the cost consideration).. a solar panel orbiter, with an area of over 4 km square can transmit 1 Gigawat of power using microwave base station on ground or rover itself.
The japs are planning a similar project to power their home.

With wireless energy transfer efficiency is the main factor. The possible ways are using electrodynamic induction, Lasers, microwaves.



The specific power source for moon rover has only one main requirement: Max power and mobility.

At present, i can think of two may to provide more power.

1) It may sound weired, but a construction of giant lens over moon is best solution with present tech at this moment. The focussed sun light will earn extra energy, and may be worth the cost.
or/and
2) A stationary solar array on moon, which can store the power and transfer it over to the rover.

the last and futuristic option is using mini nuke reactors... but i guess ISRO is already working on it.


I agree that this cooperation will speed up our learning curve.
And may be ISRO is not spending time reinventing the wheel, they are buying it...
Why should they spend millions/billions to invent the same tech other space giant use. Anyway the coming decade is probably a time for shift in space ship tech change. If ISRO is thinking on this line... they are probably aiming to develop their own next gen space ship in coming decade.. may be by 2025.
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Re: Indian Space Program Discussion

Post by Sanjay M »

Indian researchers are developing femtosecond-pulse comb lasers for laser alignment to enable precision formation flying of spacecraft:

http://trak.in/news/femtosecond-comb-la ... ace/10432/

This could be particularly valuable for a distributed space telescope network, where you have multiple spacecraft collectively imaging the same target to act like one giant telescope.
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Re: Indian Space Program Discussion

Post by sanjaykumar »

One could build very large telescopes, sensors and also have a new way of launching satellite mission that would be replaced or improved component wise. Costs would be lowered very substantially.
Sanjay M
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Re: Indian Space Program Discussion

Post by Sanjay M »

India Plans Space Tourism Offering
ISRO wants to buy non-reusable Soyuz TMA spacecraft and sell two of its three seats to fare-paying passengers. The value of the potential deal was not revealed.

"ISRO has applied for acquiring a spaceship for space tourists," said Russian space agency Roskosmos spokesman Alexei Krasnov, who added that the deal would be purely commercial and that the Soyuz would probably be piloted by a Russian cosmonaut.
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Re: Indian Space Program Discussion

Post by Gagan »

^^^
My rumor sensor is tingling. :roll:
Sanjay M
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Re: Indian Space Program Discussion

Post by Sanjay M »

I think it would be fabulous if ISRO went into Space Tourism. What a great way for us to make money off the space program, like with medical tourism.

What a great way for India to get a large volume of launch customers. What a great way to make good use of our cost advantage. What a great way for Antrix to expand its market reach, by including space tourism services in its offering.

What a great way for India to rapidly develop experience in manned spaceflight operations and systems, while deriving some revenue in the process.

What a great way to catch up with the advanced countries.
Sanjay M
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Re: Indian Space Program Discussion

Post by Sanjay M »

a_bharat wrote:How does one beam power? I know there were some experiments to transmit power wirelessly -- small amounts over very small distances in lab setup.
How does the Sun beam power to keep us alive here on Earth?
Through photons.

In the case of a solar collector in lunar orbit, we could gather solar energy and re-direct it down to the lunar surface.

animesharma wrote:yeah a_bharat, the lab tested version of wireless power transfer were succesful because they had low power loss.
it is possible to transmit power from a long distance, but the only problem is high loss during the process of transmission.

However,(keeping aside the cost consideration).. a solar panel orbiter, with an area of over 4 km square can transmit 1 Gigawat of power using microwave base station on ground or rover itself.
The japs are planning a similar project to power their home.

With wireless energy transfer efficiency is the main factor. The possible ways are using electrodynamic induction, Lasers, microwaves.

The specific power source for moon rover has only one main requirement: Max power and mobility.

At present, i can think of two may to provide more power.

1) It may sound weired, but a construction of giant lens over moon is best solution with present tech at this moment. The focussed sun light will earn extra energy, and may be worth the cost.
Maybe not a lens -- but a mirror.

A lens has to be thick, but a mirror can be quite thin.

Imagine if we could inflate a very large innertube/donut shape in space. Across the middle of the donut hole, we could stretch a reflective skin, and curve that into a parabolic-dish shape.

Again, I think that a material like graphene would be an excellent choice to make the skin of such a balloon. The reflective portion could be coated with aluminum, just like mylar.
or/and
2) A stationary solar array on moon, which can store the power and transfer it over to the rover.

the last and futuristic option is using mini nuke reactors... but i guess ISRO is already working on it.

Yes, if we can make small-scale research reactors, we could also make something small enough to fit on a spacecraft and bring down to the lunar surface.


And may be ISRO is not spending time reinventing the wheel, they are buying it...
Why should they spend millions/billions to invent the same tech other space giant use. Anyway the coming decade is probably a time for shift in space ship tech change. If ISRO is thinking on this line... they are probably aiming to develop their own next gen space ship in coming decade.. may be by 2025.
Well, I assume that UMLV is our next-generation launcher, after GSLV-Mk3.
As for manned vehicle, who knows what is on the cards after our initial manned missions with the Soyuz-type capsule.
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Re: Indian Space Program Discussion

Post by Kailash »

Sanjay M wrote:a_bharat wrote:
How does one beam power? I know there were some experiments to transmit power wirelessly -- small amounts over very small distances in lab setup.


How does the Sun beam power to keep us alive here on Earth?
Through photons.

In the case of a solar collector in lunar orbit, we could gather solar energy and re-direct it down to the lunar surface.
I guess that the question is about transmission efficiency and focusing of such power precisely on to the rover, wastages etc. Can some guru address specifics in terms of size of solar panels, amount of power that can be stored and transmitted to the surface, inherent losses - thus arriving at a ball park figure to show if the system can be efficient enough?

If this method is successful, the rover would have much greater range and mobility. If the power available is very low, and losses are high, we may have to track the rover and focus it precisely on it
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Re: Indian Space Program Discussion

Post by Sanjay M »

A star sensor type of device could be used to target the rover, along with possibly a homing signal.

I mentioned in a previous post about femtosecond comb lasers being used to synchronize spacecraft flying in formation, and to aim the upcoming Astrosat orbiting observatory, so likewise it could be used to precisely aim the solar collector at the rover.

Perhaps here the same laser signal could be used as a power feed.
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Re: Indian Space Program Discussion

Post by a_bharat »

Sanjay M wrote:
a_bharat wrote:How does one beam power? I know there were some experiments to transmit power wirelessly -- small amounts over very small distances in lab setup.
How does the Sun beam power to keep us alive here on Earth?
Through photons.

In the case of a solar collector in lunar orbit, we could gather solar energy and re-direct it down to the lunar surface. as opposed to directly gathering it on the surface of the moon or rover?
I don't have any domain expertise here, but am skeptical about the practicality/utility of such a method because:
- the solar arrays deployed in lunar orbit need to be stationary relative to a point on the moon
- reflect/focus light from a point hundreds of kilometers away from the rover

Has this method been tried by anyone? Any research been/being carried out on this?
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Re: Indian Space Program Discussion

Post by Sanjay M »

If not stationary, they at least need to be slow moving, to allow the spacecraft to adjust the angle of its aim.

As I've said before, the L1 and L2 zones are situated between the Earth and the Moon, where the gravity between them cancels. As the Moon's face is stationary with respect to the Earth's position (tidal locking), then the L1 and L2 zones should be stationary with respect to the Moon's face.

So we could park solar arrays in the L1 and L2 zones, to aim their power at the near side of the Moon.

Here's an article on microwave-heating to extract lunar water:

http://www.hinduonnet.com/fline/stories ... 100900.htm

I'm thinking that a similar method could also be used to extract the Helium-3 at the same time.
So we should send rovers onto the surface which can do both. One tank could collect water, while another could accumulate Helium-3, all at the same time.

The power beamed down from the orbiting arrays could be used to power the rover as it traveled across the landscape collecting these precious substances. The rovers would then have a lot more usable power, to do their work.
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Re: Indian Space Program Discussion

Post by a_bharat »

L1 is about 55000 km from Moon's surface and L2 is about 60000 km. We might need a nano sun to transmit energy in the form of light from that distance.
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Re: Indian Space Program Discussion

Post by Sanjay M »

a_bharat wrote:L1 is about 55000 km from Moon's surface and L2 is about 60000 km. We might need a nano sun to transmit energy in the form of light from that distance.
But if it's a focused beam then distance is no factor, since there is no attenuation in the vacuum of space, as contrasted with the atmosphere. You can send a laser from the Moon to Pluto without any loss in power, since it's only traveling through vacuum all the way.

Aiming might be a challenge at that distance, but consider that Geo-stationary orbit is 40,000 km above the Earth, and we already operate geo-stationary satellites.

Consider that at L1 and L2, there is no real orbital maintenance to worry about, since the gravities of Earth and Moon cancel out over there. If you are free of the hassle of orbital maintenance, that means you can be extravagant with how much mass you place there, enabling the use of a large solar array. That's what makes L1 and L2 so strategically valuable.

Perhaps we could even take space tourists out that far, if we established an orbital base out there.
I really like the idea of India pursuing space tourism, just like how it does medical tourism already, and I hope that this might one day extend to lunar tourism.

http://economictimes.indiatimes.com/new ... 087037.cms
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Re: Indian Space Program Discussion

Post by KrishG »

Sanjay M wrote:I think it would be fabulous if ISRO went into Space Tourism. What a great way for us to make money off the space program, like with medical tourism.
ISRO isn't buying Soyuz, where's the question of space tourism ?? The article is a very bad english translation from Russian. ISRO wants 2 of it's astronauts to fly on Soyuz once before we'll launch our own OV in an year or so after the Soyuz flight. It'll not be a flight to the ISS but independent orbit around earth.

The present Soyuz-TMA has been optimized for the ISS crew rotation and has little independent capability for long periods of time. So, Russia will have to manufacture the retired TM version specifically for India for a single flight. So it could cost much higher.
"ISRO has applied for acquiring a spaceship for space tourists,"
Means ISRO will have to fund the manufacture of Soyuz-TM and all additional cost. No space tourism.
Sanjay M wrote: Well, I assume that UMLV is our next-generation launcher, after GSLV-Mk3.
As for manned vehicle, who knows what is on the cards after our initial manned missions with the Soyuz-type capsule.
the Indian OV is necessarily a Soyuz without it's orbital module. It has been designed by ISRO with some Russian help and will have some Russian components. DUe to the limited capability of the GSLV, the OV can't have an orbital module. But, ISRO already has plans for an upgraded version with OM which will be launched on Mk-III. This is necessarily what has been planned until now wrt HSF.
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Re: Indian Space Program Discussion

Post by Sanjay M »

Here, take a look at the upcoming GSAT-4's capabilities:

http://flareout.blogspot.com/2009/09/is ... genic.html
Amidst the new technologies being tested on board GSAT-4 are stationary plasma thrusters, Bus Management Unit (BMU), miniaturized dynamically tuned gyros, 36 AH Lithium ion battery, 70 V bus for Ka-band and on board structural dynamic vibration beam accelerometer.

GSAT-4 spacecraft will have a power generation capability of 2,500 watts and will be positioned at 82 degrees east longitude in a geo-stationary orbit, about 36,000 km above the earth.


So if ISRO can aim satellites operating at an altitude of 36,000km, then why can't they aim satellites at an altitude of 55,000km?
We could undertake such a mission to L1/L2 jointly with some other country, to subsidize the costs.
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Re: Indian Space Program Discussion

Post by Sanjay M »

KrishG wrote:ISRO isn't buying Soyuz, where's the question of space tourism ?? The article is a very bad english translation from Russian. ISRO wants 2 of it's astronauts to fly on Soyuz once before we'll launch our own OV in an year or so after the Soyuz flight. It'll not be a flight to the ISS but independent orbit around earth.

The present Soyuz-TMA has been optimized for the ISS crew rotation and has little independent capability for long periods of time. So, Russia will have to manufacture the retired TM version specifically for India for a single flight. So it could cost much higher.
Waitasec - nobody's mentioning ISS here - you're the one mentioning ISS.
You don't need to travel to ISS to do space tourism. Certainly Branson's Virgin Galactic won't be traveling to ISS.

Means ISRO will have to fund the manufacture of Soyuz-TM and all additional cost. No space tourism.
Well, even the Russians do space tourism flights. We could likewise do it, at cheaper cost, and the price of manufacture of the spacecraft is incorporated into the ticket price. If somebody wants to pay us for the ride, then I say let them.
the Indian OV is necessarily a Soyuz without it's orbital module. It has been designed by ISRO with some Russian help and will have some Russian components. DUe to the limited capability of the GSLV, the OV can't have an orbital module. But, ISRO already has plans for an upgraded version with OM which will be launched on Mk-III. This is necessarily what has been planned until now wrt HSF.
Well orbital module is meant for extended stays in space, which isn't required for space tourism. The basic orbital vehicle could do just fine for that. Our main selling point would be our price advantage over others. Again, I'm thinking that we could attract customers, just as we do with medical tourism.

The point would be to subsidize a higher volume of space launches, and the required infrastructure for it, in order to mature our platforms faster, and to gain a stronger foothold in the commercial space sector.
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Re: Indian Space Program Discussion

Post by a_bharat »

Sanjay M wrote: So if ISRO can aim satellites operating at an altitude of 36,000km, then why can't they aim satellites at an altitude of 55,000km?
We could undertake such a mission to L1/L2 jointly with some other country, to subsidize the costs.
55,000km is the distance from Moon's surface to L1. The distance from Earth is 323,110 km.
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Re: Indian Space Program Discussion

Post by a_bharat »

Sanjay M wrote: Consider that at L1 and L2, there is no real orbital maintenance to worry about, since the gravities of Earth and Moon cancel out over there. If you are free of the hassle of orbital maintenance, that means you can be extravagant with how much mass you place there, enabling the use of a large solar array.
Read somewhere that orbit would still be required in L1 for stability. It is akin to orbiting the peak of a hill as opposed to being perched on the top of the hill.
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Re: Indian Space Program Discussion

Post by Sanjay M »

a_bharat wrote:
Sanjay M wrote: So if ISRO can aim satellites operating at an altitude of 36,000km, then why can't they aim satellites at an altitude of 55,000km?
We could undertake such a mission to L1/L2 jointly with some other country, to subsidize the costs.
55,000km is the distance from Moon's surface to L1. The distance from Earth is 323,110 km.
You misunderstand me - I'm saying that at a distance of 55,000km above the surface of the Moon, a solar array at L1 could be capable of aiming its power onto a specific position on the Moon's surface, just as a Geo-stationary satellite hovering 40,000km above the Earth can aim at a particularl spot on the Earth's surface.
a_bharat wrote:Read somewhere that orbit would still be required in L1 for stability. It is akin to orbiting the peak of a hill as opposed to being perched on the top of the hill.
No big deal - it should be able to aim at the proper spot on the lunar surface even it's orbiting the L1 centre-point.
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Re: Indian Space Program Discussion

Post by merlin »

IIRC GSAT-4 also carries the GAGAN payload. Waiting for that to be turned on after launch.
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Re: Indian Space Program Discussion

Post by KrishG »

Sanjay M wrote: Waitasec - nobody's mentioning ISS here - you're the one mentioning ISS.
You don't need to travel to ISS to do space tourism. Certainly Branson's Virgin Galactic won't be traveling to ISS.
The point I am trying to make here is that ISRO won't be offering any sort of space tourism. To offer paid flights, both the launch platform and crew vehicle must be very well tested and a excellent track record.

The current focus of ISRO is on it's own HSF program and tere no plans what-so-ever to offer paid spaceflights. The Russian press reported the Indian astronauts who are to fly on Soyuz as space tourists and that India is negotiating prices for Soyuz with independent operation for about a week or two.
Sanjay M wrote:Well, even the Russians do space tourism flights. We could likewise do it, at cheaper cost, and the price of manufacture of the spacecraft is incorporated into the ticket price. If somebody wants to pay us for the ride, then I say let them.

Well orbital module is meant for extended stays in space, which isn't required for space tourism. The basic orbital vehicle could do just fine for that. Our main selling point would be our price advantage over others. Again, I'm thinking that we could attract customers, just as we do with medical tourism.

The point would be to subsidize a higher volume of space launches, and the required infrastructure for it, in order to mature our platforms faster, and to gain a stronger foothold in the commercial space sector.
For offering commercial flights we must have a proven platform as the Russians have the Soyuz LV and CV. Nobody will pay to go on an untested spacecraft or LV. And frankly there are no such plans as of now.
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Re: Indian Space Program Discussion

Post by sanjaykumar »

But if it's a focused beam then distance is no factor, since there is no attenuation in the vacuum of space, as contrasted with the atmosphere.


The inverse square law. In a collimated laser beam this may be true.
Arunkumar
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Re: Indian Space Program Discussion

Post by Arunkumar »

Chandrayaan-2 expected to be double the weight of Chandrayaan-1

From the link,
Isro is attempting to miniaturise the payloads so that more instruments can be crammed in. As was the case in CY-1 , proposals from phoren countries were invited out of which 6 were selected.
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Re: Indian Space Program Discussion

Post by Shankar »

he local make cryogenic engine have reached Sriharikota laucnh complex - the transit from LPSC got delayed due to faulty vibration sensor to check road vibration had to be replaced - after some function check like gimball movement etc it should be integrated into the already assembled first and second stage -5 weeks max so by December it should be ready to launch (gslv mk2) - CHEERS to ISRO
rahulm
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Re: Indian Space Program Discussion

Post by rahulm »

Shankar, the update is appreciated.

This is a milestone launch for ISRO as success will give us full autonomy upto 2-2.5 tons to GTO.
KrishG
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Re: Indian Space Program Discussion

Post by KrishG »

Shankar wrote:he local make cryogenic engine have reached Sriharikota laucnh complex - the transit from LPSC got delayed due to faulty vibration sensor to check road vibration had to be replaced - after some function check like gimball movement etc it should be integrated into the already assembled first and second stage -5 weeks max so by December it should be ready to launch (gslv mk2) - CHEERS to ISRO
Is any PSLV stacking going on at SHAR at the FLP ??
Shankar
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Re: Indian Space Program Discussion

Post by Shankar »

no PSLV stacking as of now -after oceansat 2 next one is yet to come in
focus is on GSLV at the moment - since first time cryoengine made in india is foing to fly -everyone is being exyra careful as you can make out from the vibration sensor thing - my small contribution is there too -in cryo engine -but will talk about it after laucnh
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Re: Indian Space Program Discussion

Post by nrshah »

Shankar wrote:my small contribution is there too -in cryo engine -but will talk about it after laucnh
Hip Hip Hurray
Hip Hip Hurray

No contribution is small unless the objective is small which is not in this case...

We are proud to have you with us... thanks for making us so.

-Nitin
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