Indian Space Capabilities

[faithfulguy]

First launch and than make news out of it.

Common. what would be the fun of this forum if this is the case. This site would half 1/10th of the traffic and might even not be able to survive if anything happened in India was not announced with a fanfare and a parade.

 

[nakodo]

The Hindu : Opinion / Editorials : Learning from failure

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Learning from failure

It is almost a rite of passage that an Indian launch vehicle runs into trouble in its first flight. The country's very first attempt to launch a satellite failed in August 1979 when the SLV-3 rocket went out of control and ended up in the Bay of Bengal. A year later, those problems were sorted out and the rocket put a 35-kg Rohini satellite into orbit. The Indian Space Research Organisation had to cope with two successive failures with the Augmented Satellite Launch Vehicle (ASLV) before its third flight in 1992 went smoothly. In 1993, a series of technical shortcomings coalesced and the first flight of the Polar Satellite Launch Vehicle (PSLV) ended in failure. Those issues were swiftly resolved and the PSLV has become known for its ability to carry out a wide range of missions with rugged reliability. The first launch of the Geosynchronous Satellite Launch Vehicle (GSLV) nine years ago, using a Russian-made cryogenic upper stage, was, to some extent, the exception. Although the GSAT-1 satellite was put into orbit, a small under-performance of the cryogenic stage meant that it was not the planned orbit. Attempts to move the satellite using its own thrusters were not successful and the satellite was ultimately abandoned.

Despite such a history, the failure of Thursday's GSLV launch with the country's first indigenous cryogenic engine and stage came as a bolt from the blue. The engine and later the full stage have gone through extensive testing on the ground in the course of their development. Moreover, the actual engine that flew on the GSLV was test-fired on the ground for 200 seconds. Exhaustive reviews by experts of the cryogenic stage and the rocket were completed before the GSLV was cleared for launch. After the unsuccessful flight, the ISRO chairman, K. Radhakrishnan, initially suggested that two small cryogenic steering engines, which swivel to maintain the rocket's orientation, might have malfunctioned. Later, however, he indicated that the main cryogenic engine itself might not have ignited. In such a complex system as the cryogenic stage, even a small defect that escapes attention is sufficient to doom the flight. But the space agency would be unwise to confine its analysis to problems encountered with the indigenous cryogenic stage. This is an opportunity for a thorough examination of the entire GSLV rocket and its past five flights. There have, for instance, been problems with the Vikas liquid-propellant engine in previous flights. The procedures for the manufacture, assembly, and pre-flight testing of all liquid propellant engines and stages need particular attention. A comprehensive review would best ensure the future reliability of the GSLV.

 

[indopak5]

Common. what would be the fun of this forum if this is the case. This site would half 1/10th of the traffic and might even not be able to survive if anything happened in India was not announced with a fanfare and a parade.

yeah you are right. we enjoy everything in india even our failures. BTW why this giving heat to you?

 

[Bang Galore]

First launch and than make news out of it.

Ditto..ISRO or whatever,first launch and then talk..

Actually guys, this launch is very different from the GSLV launch which was trying out something new. Cartosat-2B is being launched using the PSLV which has had 15 successful launches continuously.

See below:

The Polar Satellite Launch Vehicle,usually known by its abbreviation PSLV is the first operational launch vehicle of ISRO. PSLV is capable of launching 1600 kg satellites in 620 km sun-synchronous polar orbit and 1050 kg satellite in geo-synchronous transfer orbit. In the standard configuration, it measures 44.4 m tall, with a lift off weight of 295 tonnes. PSLV has four stages using solid and liquid propulsion systems alternately. The first stage is one of the largest solid propellant boosters in the world and carries 139 tonnes of propellant. A cluster of six strap-ons attached to the first stage motor, four of which are ignited on the ground and two are air-lit.

The reliability rate of PSLV has been superb. There had been 15 continuously successful flights of PSLV, till September 2009. With its variant configurations, PSLV has proved its multi-payload, multi-mission capability in a single launch and its geosynchronous launch capability. In the recent Chandrayaan-mission, another variant of PSLV with an extended version of strap-on motors, PSOM-XL, the payload haul was enhanced to 1750 kg in 620 km SSPO. PSLV has rightfully earned the status of workhorse launch vehicle of ISRO.
Typical Parameters of PSLV
Lift-off weight 295 tonne
Pay Load 1600 kg in to 620 km Polar Orbit,
1060 kg in to Geosynchronous Transfer Orbit (GTO)
Height 44 metre

PSLV Milestones
PSLV-C14 launched Oceansat - 2 and Six Nanosatellites on September 23, 2009 (Successful)
PSLV-C12 launched RISAT-2 and ANUSAT on April 20, 2009 (Successfully)
PSLV-C11 launched CHANDRAYAAN-I, on October 22, 2008 (Successful)
PSLV-C9 launched CARTOSAT-2A, IMS-1 and Eight nano-satellites on April 28, 2008 (Successful)
PSLV-C10 launched TECSAR on January 23, 2008 (Successful)
PSLV-C8 launched AGILE on April 23, 2007 (Successful)
PSLV-C7 launched CARTOSAT-2, SRE-1, LAPAN-TUBSAT and PEHUENSAT-1 on January 10, 2007 (Successful)
PSLV-C6 launched CARTOSAT-1 and HAMSAT on May 5, 2005 (Successful)
PSLV-C5 launched RESOURCESAT-1(IRS-P6) on October 17, 2003 (Successful)
PSLV-C4 launched KALPANA-1(METSAT) on September 12, 2002 (Successful)
PSLV-C3 launched TES on October 22, 2001 (Successful)
PSLV-C2 launched OCEANSAT(IRS-P4), KITSAT-3 and DLR-TUBSAT on May 26, 1999 (Successful)
PSLV-C1 launched IRS-1D on September 29, 1997 (Successful)
PSLV-D3 launched IRS-P3 on March 21, 1996 (Successful)
PSLV-D2 launched IRS-P2 on October 15, 1994 (Successful)
PSLV-D1 launched IRS-1E on September 20, 1993 (Unsuccessful).

Welcome To ISRO :: Launch Vehicles :: PSLV

 

[Dark Angel]

STUDSAT- ISRO's next venture by students

April 17, 2010

After the disappointing failure of its recent space venture, the Indian Space Research Organization (ISRO) is now planning to launch a satellite in May this year that for the first time will solely be developed by students and would cost around Rs.55 lakh.

The satellite has been developed by a team of students from around seven engineering colleges in Bangalore and Hyderabad. It will be used to capture high-resolution images from space that will be made available to students.

The satellite named STUDSAT will be put in the Low Earth Orbit around 680 kilometers above the earth by ISRO's Polar Satellite Launch Vehicle (PSLV) from the Satish Dhawan Space Centre in Sriharikota. The satellite has a volume of just 1.1 litres and weighs just one kilogram.

Source from ISRO has reported that the satellite is in the Pico category and would be attached on the back of the PSLV along with three other satellites.

The STUDSAT has a built in camera to produce high-resolution photographic data for the purpose of remote sensing applications and vegetation studies for six months. This data would be commercially sold and would be inaccessible for students but will be given free to students to conduct research such as land mapping.

STUDSAT- ISRO's next venture by students, Science News - By Indiaedunews.net

Man great to see ISRO helping students not that it hasent done this in the past but is really great to see such a giant and successful org to help a bunch of students great

Jai ho

 

[liteon]

ISRO will do it. Failure is the pillar of success. Every country went through this. Now also advanced space faring countries have so much problems and failures. If I am not mistaken India has the second highest resolution optical satellites after Israel out side EU and America.

bs. there're a lot of optical satellites out there with high resolution but they don't advertise about em..japan, korea, china, russia. japan and korea has very advanced optical & electronics tech..

also resolution don't mean ****. it's the quality of the lens and image sensor that counts as can be seen in a point shoot camera vs. DSLR camera....15 megapixel point shoot looks crappier than a 3 megapixel DSLR when digital zoom to the same 15 megapixel..

 

[jbond197]

bs. there're a lot of optical satellites out there with high resolution but they don't advertise about em..japan, korea, china, russia. japan and korea has very advanced optical & electronics tech..

also resolution don't mean ****. it's the quality of the lens and image sensor that counts as can be seen in a point shoot camera vs. DSLR camera....15 megapixel point shoot looks crappier than a 3 megapixel DSLR when digital zoom to the same 15 megapixel..

Please provide some credible links to prove your point and enlighten us...

 

[liteon]

Please provide some credible links to prove your point and enlighten us...

anyone owned a DSLR and a point shoot knows the differences in picture quality and that the advertised resolution on paper don't mean ****..

an optical satellites camera still follows the same basic concept as your hand-held camera. nothing new. it's just big heavily mod to survive an shoot from space. still needs high quality lenses and advanced image sensors for superb quality image.

all those countries never disclose info about their spy sats, so claiming india is better is bs when 2 of those countries are amongst the best in the world in optical and electronics...

 

[shekhar]

anyone owned a DSLR and a point shoot knows the differences in picture quality and that the advertised resolution on paper don't mean ****..

an optical satellites camera still follows the same basic concept as your hand-held camera. nothing new. it's just big heavily mod to survive an shoot from space. still needs high quality lenses and advanced image sensors for superb quality image.

all those countries never disclose info about their spy sats, so claiming india is better is bs when 2 of those countries are amongst the best in the world in optical and electronics...

thats the reason for the sorry state of pak space department
u ppl compare digital cameras with satellite

 

[liteon]

i am talking about lens quality, image sensor chip, and many others that make a good camera, not an advertised resolution blabla on paper..i've seen an indian high res images taken by their other sats on bharat..images are so blurry when zoom in pics pixelated like craphola.....so whatever you believe..lol

 

[DMLA]

i am talking about lens quality, image sensor chip, and many others that make a good camera, not an advertised resolution blabla on paper..i've seen an indian high res images taken by their other sats on bharat..images are so blurry when zoom in pics pixelated like craphola.....so whatever you believe..lol

Where did you see these images? AFAIK, ISRO does not release images at highest resolution for general public! The images put up on their website are of 1/100th to 1/1000th resolution.

 

[Justin Joseph]

GSLV mission: Scientists say cryogenic engine had ignited

THIRUVANANTHAPURAM: A team of Indian space scientists has established that the indigenously built cryogenic engine had ignited for a second during the failed GSLV mission Thursday.

"This took place for a second and then the fuel supply to power turbo got blocked. The (Indian Space Research Organisation) chairman and we knew this on Thursday but then we wanted to be doubly sure about it. And now this has been substantiated with the data. By all means this is a great achievement," said a senior scientist who did not wish to be identified.

Speaking to IANS, senior space scientists said they have with them records to prove that compression had taken place and the cryogenic engine had ignited.

The GSLV D3 blasted off with a GSAT 4 satellite around 5 p.m. Thursday from Sriharikota in Andhra Pradesh but then stopped emitting signals within minutes.

A high-level meeting began here Saturday to review the flight data of Thursday's failed rocket mission.

The meeting is taking place at the Vikram Sarabhai Space Centre (VSSC) here, a unit of the ISRO.

ISRO Chairman K. Radhakrishnan, who arrived here Saturday night, is leading the discussion.

"The two-day meeting has also decided to constitute a failure analysis committee, where complete reasons would be listed of the failure of the mission. Finer details of the probable causes of failure would be analysed thread-bare. This committee would be headed by our chairman and would have sittings here and in Bangalore and in a month the report would be ready," added the space scientist.

It was at ISRO's centre at Valiyamala, in the city suburbs, that the cryogenic project took shape from the design stage to the assembly stage.

GSLV mission: Scientists say cryogenic engine had ignited-ET Cetera-News By Industry-News-The Economic Times

 

[liteon]

Where did you see these images? AFAIK, ISRO does not release images at highest resolution for general public! The images put up on their website are of 1/100th to 1/1000th resolution.

yep, still image looks blurry. scale down image supposed to look crisp and sharper than the original 1:1.

you can have an image with very high resolution and very large size that is poor quality..

*ttp://www.isro.org/pressrelease/contents/2008/images/11.jpg

 

[Kinetic]

bs. there're a lot of optical satellites out there with high resolution but they don't advertise about em..japan, korea, china, russia. japan and korea has very advanced optical & electronics tech..

also resolution don't mean ****. it's the quality of the lens and image sensor that counts as can be seen in a point shoot camera vs. DSLR camera....15 megapixel point shoot looks crappier than a 3 megapixel DSLR when digital zoom to the same 15 megapixel..

500% BS. Comparing your hundred dollar camera with an advanced optical satellite? Don't open yourself too much, people are laughing!!

I know when I will ask for a source you will run away!!!

 

[kashith]

what do you expect from a pakistani member,they cant send a single satellite,which btw university students are making in India,they will try to downplay ISRO's achievement because they sure can buy missiles but not satellites