Indian Space Program Discussion

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Postby jash_p » 28 Apr 2008 09:40

DD Live is coming

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Postby SSridhar » 28 Apr 2008 09:55

Congratulations ISRO for a perfect launch.

It was announced that Cartosat-2A & IMS have deployed their solar panels and full power is generated. For the other satellites, their health will be known in about an hour's time.

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Lift off

Postby Santosh » 28 Apr 2008 09:58

Lift off

http://broadband.indiatimes.com/videoshow/2989476.cms

Kudos to the team and ISRO.

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Postby Mort Walker » 28 Apr 2008 10:00

Congratulations to ISRO, a job well done!

In the future could people in this thread please place links to where a launch can be watched live? Its going to be a busy year for launches and its a significant event to watch. Thanks in advance.

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Postby Skanda » 28 Apr 2008 10:34

ISRO sets world record with 10 launches
India's PSLV-C9 has successfully injected ten satellites into orbit.

The Indian Space Research Organisation (ISRO), set up 35 years ago, may be a baby among the world's space faring nations. But, it is competing with the other biggies to set world records.

And the mission, which has given ISRO an edge over other competitors, is the launch of India's latest Polar Satellite Launch Vehicle (PSLV).

The launch vehicle took off from Sriharikota in Andhra Pradesh and has launched 10 satellites - a feat which has created a world record.

PSLV weighs 230 tons - the weight of almost 50 elephants - and is as high as a 12-storey building.

The launch vehicle has put two Indian and eight foreign satellites into orbit, it has beaten the current world record of hoisting eight satellites at one go accomplished by Russia almost a year ago.

At lift-off, the first stage of the rocket ignited. Three minutes after the flight, the massive heat shield peeled off. And then, one after the other, the third and fourth stages ignited taking the rocket higher.

Almost 15 minutes after the flight, India's mapping satellite called CARTOSAT 2-A was the first one to be put into orbit and 45 seconds later, the experimental remote sensing satellite, called the Indian Mini Satellite, was put into orbit.

After a gap of 100 seconds, all the babies on board were sequentially dropped off one by one, with a gap of 20 seconds each with the mission ending almost 20 minutes after lift-off.

The first foreign satellite to be dropped off was CUTE from Japan and the last to be ejected was RUBIN from Germany.

The high-resolution mapping satellite CARTOSAT 2-A, which, while placed at a height of over 600 kilometres, can identify objects as small as a car.

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Postby rrao » 28 Apr 2008 11:17

Great job ISRO! keep it up!

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Really Good

Postby kvraghavaiah » 28 Apr 2008 12:02

Really a very happy moment. I wish God's blessings on India for a healthy science and technological strength, freed from corruptive politics and powered by enthusiasm of the young Indians.

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Postby sum » 28 Apr 2008 12:13

Yipeeeee............. :twisted:

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Postby symontk » 28 Apr 2008 12:17

Entire 2008 is going to be milestone year in ISRO's history with a lot of launches planned for the year

Great Job, go ahead for the next one....

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Gr8 news..

Postby pranab » 28 Apr 2008 12:35

It really made me proud...
Indiyeah all the way...

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Postby Kakarat » 28 Apr 2008 12:51


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Postby sauravjha » 28 Apr 2008 13:00

has any ELV been more consistent than the PSLV ? The PSLV might just end up being the most successful launcher in history.

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Postby Arun_S » 28 Apr 2008 13:06

Congratulations ISRO and all its supporting partner organizations/companies.

I wish GOI/DST/ISRO craft a reward payout scheme that ensures stakeholders do not letdown their guard to ensure relibale missions, yet properly balanced objectives for risk taking to increase market share and stay competitive.

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Postby Aditya_V » 28 Apr 2008 13:35

Congrats ISRO!

Knowledgeable forum members, is the ability to launch multiple sattelites with the same satellite and MIRV technology have any similarities. Can this knowledge be transferred to DRDO for thier warhead seperation

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Postby Ranvijay » 28 Apr 2008 14:11

Now for Chandrayaan :twisted:

And please, stop bringing the paklets into this. chotey logo sey comparison kyon karey?

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Postby symontk » 28 Apr 2008 14:25

Aditya_V wrote:Congrats ISRO!

Knowledgeable forum members, is the ability to launch multiple sattelites with the same satellite and MIRV technology have any similarities. Can this knowledge be transferred to DRDO for thier warhead seperation


As per GOI, space activities and the military activities are totally unrelated. Please dont mention any military aspect in this thread

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Postby ashish raval » 28 Apr 2008 14:39



8) Party time...take the contributers on a cruise holiday to bali ;)

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Postby prashanth » 28 Apr 2008 14:40

Congrats ISRO! Now get ready for Chandrayaan. All the best!

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Postby Shankar » 28 Apr 2008 15:04

Congratulations ISRO and ofcousre LPSC for a text book launch -you sure make us all proud -now to moon

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Postby Shankar » 28 Apr 2008 15:10

I
n a path breaking mission the Indian Space Research Organisation's (ISRO) Polar Satellite Launch Vehicle (PSLV-C9), successfully launched the 690 kg Indian remote sensing satellite Cartosat-2A, the 83 kg Indian Mini Satellite (IMS-1) and eight nano-satellites for international customers into a 637 km polar sun synchronous orbit. This is for the first time in the world that ten satellites have been launched into orbit in a single mission breaking an earlier record held by Russia, which had injected eight satellites into orbit in a single launch.

At the end of the 52-hour countdown, the PSLV-C9, with a lift-off mass of 230 tonnes, blasted off from the launch pad and soared into the clear sky in a textbook launch. Fourteen minutes after lift off, the fourth stage of the PSLV-C9 injected all the ten satellites into the 635 km polar sun synchronous orbit.

fter the final count down, PSLV-C9 lifted off from the second launch pad at SDSC SHAR, at 09:24 Hrs IST with the ignition of the core first stage. The important flight events included the separation of the first stage, ignition of the second stage, separation of the heat-shield at about 125 km altitude after the vehicle had cleared the dense atmosphere, second stage separation, third stage ignition, third stage separation, fourth stage ignition and fourth stage cut-off.

The 690 kg main payload, Cartosat-2A, was the first satellite to be injected into orbit at 885 seconds after lift-off at an altitude of 637 km. This was followed about 45 seconds later, with the Indian Mini Satellite (IMS-1)being separated after which all the nano-satellites were separated in sequence.

Indian Mini Satellite (IMS-1), flown as an auxiliary payload on board PSLV-C9, is developed by ISRO for remote sensing applications. Weighing 83 Kg at lift-off, IMS-1 incorporates many new technologies and has miniaturised subsystems. It carries two remote sensing payloads - a multi-spectral camera (Mx payload) and a Hyper-spectral camera (HySI payload), operating in the visible and near infrared regions of the electromagnetic spectrum.

The spatial resolution of Mx camera is 37 metre with a swath of 151 km while that of HySI is about 506 metre with a swath of about 130 km. The data from this mission will be made available to interested space agencies and student community from developing countries to provide necessary impetus to capacity building in using satellite data.

Eight nano-satellites from abroad are carried as auxiliary payloads, besides the IMS-1 as well as the Cartosat-2A. The total weight of these nano-satellite payloads is about 50 kg.

Six of the eight nano-satellites are clustered together with the collective name NLS-4. The other two nano-satellites are NLS-5 and RUBIN-8. The NLS-4 is developed by the University of Toronto, Canada, and consists of six nano-satellites developed by various universities.

Two of them - CUTE 1.7 and SEEDS - are built in Japan, while the other four - CAN-X2, AAUSAT-II, COMPASS-1 and DELPHI-C3 are built in Canada, Denmark, Germany and the Netherlands respectively. NLS-5 is also built by University of Toronto and RUBIN-8 is built by Cosmos International, Germany.



http://www.domain-b.com/aero/space/laun ... lv_c9.html

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Postby Shankar » 28 Apr 2008 15:12

cientists heaved a sigh relief over the weather conditions
Sriharikota, April 28: The Indian Space Research Organisation (ISRO) decided to go ahead with the launch of PSLV-C9, carrying ten satellites, only at the eleventh hour as weather conditions tried to play spoilsport.

Addressing a post-launch press conference after PSLV completed yet another successful mission, ISRO Chairman G Madhavan Nair said the scientists had a very anxious moments last night following formation of a system (low pressure) in the Bay of Bengal.

"We had very anxious moments last night. Only around 2300 hrs, we decided to go ahead with the launch. It was a very cautious decision as we did not want to take any risk. However, the winds were benign and all other parameters were fine," Mr Nair said.

The images received from Kalpana satellite showed the system was around 1000 km close to the Andaman Region. "But fortunately, it did not develop into a large or severe system. Otherwise we would have stopped the launch", he said.

Two factors- that the system did not develop into a large one and it started turning in the North East direction, made the scientists go ahead with the launch, he said. Even now, the system lay 350 km away from the coast, he added.

It was cloudy when the launch took place and the visibility was affected, "but the net

result is perfect mission," he said adding in the 1200 seconds flight, the PSLV performed excellently, much better than the text-book precision. - Staff Reporte


http://www.chennaionline.com/colnews/ne ... RYNAME=CHN

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Postby Gerard » 28 Apr 2008 15:21

Aditya_V wrote:Knowledgeable forum members, is the ability to launch multiple sattelites with the same satellite and MIRV technology have any similarities. Can this knowledge be transferred to DRDO for thier warhead seperation


Are MIRVs and Satellite Integration and Dispensation Mutually Inclusive?: An Analysis of India’s Capabilities
http://www.cdi.org/PDFs/IndiaMIRV.pdf

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Postby sauravjha » 28 Apr 2008 15:35

and once more we should pay tribute to visionaries like Sarabhai, who helped make a traumatised and completely ravaged nation what it is today and is fast becoming.

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Postby gogna » 28 Apr 2008 15:40

ISRO PSLV-C9 Successfully Launches Ten Satellites
http://www.youtube.com/watch?v=Cn-Y0lcaCOo
ISRO PSLV-C9 set to launch 10 satellites
http://www.youtube.com/watch?v=Wbm11jGIps8

Feel very proud today, Thank you ISRO, Wake up today and straight to computer, even did a little prayer before went to bed last night

Uploaded by me for world community service
Last edited by gogna on 28 Apr 2008 16:20, edited 1 time in total.

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Postby Singha » 28 Apr 2008 15:41

pslv being 12 stories tall, the size and "horns" of the mobile launch pad is
Sauronish..and there are two towers one being Eisengard and other Mordor.
....

http://www.isro.org/pslv-c9/photo/6.jpg

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Postby Vipul » 28 Apr 2008 16:38

Congrats ISRO. Slowly and steadily towards the Pratham Manned Space Mission. :)
I look foward to that day when i will be writing a similar congratulatory message to ISRO on BR' s Space programme thread.

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Postby SaiK » 28 Apr 2008 17:33

congrats!.. waiting for the 10 sats to be separated and put in orbit. [equate that to MIRV release tech test :wink: ]

btw, sanjay_m, don't pollute this pristine thread by even mentioning our neighborhood names.
Last edited by SaiK on 28 Apr 2008 17:51, edited 1 time in total.

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Postby SwamyG » 28 Apr 2008 17:48

Congratulations....hip hip hurrah. :)

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Postby gogna » 28 Apr 2008 18:13

Chandrayaan ISRO Moon Mission

http://www.youtube.com/watch?v=wwjbf-0r9TE

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Postby Kati » 28 Apr 2008 18:50

Ditto here.

gogna wrote:ISRO PSLV-C9 Successfully Launches Ten Satellites
http://www.youtube.com/watch?v=Cn-Y0lcaCOo
ISRO PSLV-C9 set to launch 10 satellites
http://www.youtube.com/watch?v=Wbm11jGIps8

Feel very proud today, Thank you ISRO, Wake up today and straight to computer, even did a little prayer before went to bed last night

Uploaded by me for world community service

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Postby Vidyarthi » 28 Apr 2008 19:31

Mort Walker wrote:Congratulations to ISRO, a job well done!

In the future could people in this thread please place links to where a launch can be watched live? Its going to be a busy year for launches and its a significant event to watch. Thanks in advance.


I watched it live today, just like the previous several ones on DD National Channel. The telecast commences about 20 minutes before the scheduled lift-off. There is a running commentary by two senior specialists of ISRO, alternately in Hindi and English. Some time they also include a ten minute capsule, showing vehicle integration. The telecast shows the Mission Control Center and Plot boards displaying the predicted trajectory along with the actual trajectory.

Afraid, I do not know of any Internet link, giving lift-off live

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Mystery green cone

Postby prao » 28 Apr 2008 19:47

Arun_S wrote:
Kakarat wrote:Photo Gallery

I wonder what is the green cone on the right background:
...image deleted....


First i wondered if the shield was in two layers with the green cone being the inner layer. But I can't imagine the advantage of that and there would certainly be disadvantages (weight, reliability...)

Now I suspect that the payload fairing is a temporary shield that is used to protect the top of the fourth stage at some point during the construction or assembly of the launch vehicle. If you look closely at the green cone, you'll see flanges with holes which seems to me are used to bolt the two halves together and which would certainly not be present in the final vehicle.

The actual heat shield is shown here and looks exactly like what is visible on the PSLV on the outside.

Image

P

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Postby rsingh » 28 Apr 2008 20:16

It is a world record. Ruskie launched 16 sats but with lighter total payload. Proud of guys at ISRO.

How it started

Image

Modesty and resourcefulness of Indian scientists is amazing.


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World record?

Postby prao » 28 Apr 2008 20:32

I really hate it when claims of records are made w/o sufficient investigation because if it turns out that the claims are false, it needlessly diverts attention from the actual achievement. Since the claims of a world record were so vague I decided to investigate a bit. Here's what I found. I found one thread with one poster claiming: This from a guy who has his own space webpage and should have been reliable. (Gunter Krebs of http://space.skyrocket.de)

The Minotaur-1 launch of 26. January 2000 put 11 payloads into orbit
The Dnepr-1 launch of 15. June 2007 orbited 14 payloads

If we count passive calibration subsats, a number of soviet Taifun-2 satellites deployed each 24 subsatellites. And two Koltso (Kosmos 1985, 2053) deployed each 36 subsatellites.

And there is also Project Westford. As each of the dipoles is a deliberately deployed object, the number of simultaneously launchd "payloads" is about 480 million.


Investigating some more, I found that the claimed Minotaur launch launched fewer satellites into orbit than the 11 claimed by the poster. Also it seems that rather than the launch vehicle releasing the satellites, this was a staged release, with the first satellite released releasing the remaining satellites. I don't know how to compare this with the PSLV -C9 launch. Here's the reference and a quote from the linked reference in that article:

http://en.wikipedia.org/wiki/Minotaur_(rocket)

The Joint Air Force-Weber State University Satellite is an American military mini-satellite launched aboard a Minotaur rocket on January 27, 2000 from Vandenberg Air Force Base in California.[1] After its own launch, JAWSAT deployed four microsatellites: FALCONSAT, OCSE, OPAL, and ASUSat.[2] JAWSAT also carried NASA's Plasma Experiment Satellite Test (PEST).


The June 2007 launch of the Depnr apparently carried only one satellite rather than the 14 claimed. However the April 2007 launch of the Depnr apparently carried at least 10 satellites and possibly more (not very clear in the article - it appears that satellites with identical names with only a difference in a numeral might have been lumped together - and I didn't look for more information)

http://en.wikipedia.org/wiki/Dnepr_rocket

The attempted launch of the Depnr of July 2006 with 18 satellites ended in failure (which I think Chairman Nair of ISRO referred - though he seems to have said 13 rather than 18 ) . See above article and the following:

http://space.newscientist.com/article/d ... earth.html

I did not investigate the Taifun launches since they seem to involve the first satellite launching the remaining ones. Regards Project Westford, each dipole was not a deliberately released object as the poster claims but it was rather a mass release (in 1963):

Inside the West Ford spacecraft, the needles were packed densely together in blocks made of a napthalene gel that would rapidly evaporate in space. This entire package of needles weighed only 20 kg. After being released, the hundreds of millions of copper needles gradually spread throughout their entire orbit over a period of two months. The final donut-shaped cloud was 15 km wide and 30 km thick and encircled the globe at an altitude of 3700 km.


So what do I think? Reliable numbers are hard to come by. I also think that it's not only Indian News agencies who play fast and loose with the truth. It is possible that the C9 launch is a world record for satellites released by the launch vehicle but it could at best be a tie it appears (given Depnr of April 2007). Of course I don't claim that my investigation is exhaustive and there could be other launches that I don't know about.

Either way it doesn't matter at all - not one bit - This is a fantastic achievement by ISRO and all of us should be immensely proud

P
Last edited by prao on 28 Apr 2008 20:39, edited 1 time in total.

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Postby Arunkumar » 28 Apr 2008 20:33

Congratulations ISRO.....good work....

Meanwhile.....

Delfi-C3 launched and active!
On the 28th of April at 03:53 UTC the Delfi-C3 was succesfully launched with a PSLV launch vehicle. At 06:45 UTC the first signal was recieved from a radio amateur in California. At 11:55 UTC the satellite signal was acquired and decoded at the TU Delft groundstation, initial analysis showed the craft to be in excellent condition, all solar panels and antennas were deployed and the internal temperatures and voltages were within the ranges expected.

The team is thrilled with this accomplishment and will continue operations after tonight celebratory barbeque!

The Delfi-C3 Team

http://www.delfic3.nl/
:D

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Postby bala » 28 Apr 2008 20:39

Once again ISRO makes every Indian proud.. kudos to ISRO

Image

Image

Image

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Postby anupmisra » 28 Apr 2008 21:11

Chandrayaan and beyond!

You have got to watch this. Well made video.

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Postby sum » 28 Apr 2008 21:28

The sighty of the mighty PSLV soaring away makes my hair stand on end......amazing pics!!!!!
Wish that our nation keeps soaring in the same fashion....

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Postby prashanth » 28 Apr 2008 21:54

Singha wrote:pslv being 12 stories tall, the size and "horns" of the mobile launch pad is
Sauronish..and there are two towers one being Eisengard and other Mordor.
....

http://www.isro.org/pslv-c9/photo/6.jpg


Hey...If PSLV is sauronish then what about GSLV? Morgoth? :)

Anyway...When ISRO perfects GSLV Mk3 we will not be needing any further foreign assistance,with regard to satellite launches. The powerful vehicle should be sufficient for all manned missions as well.


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