ISRO General News & Updates

[abhinaba]

India's Mars Orbiter Mission Has a Methane Problem
By Irene Klotz, Seeker | December 8, 2016
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"They did not design this properly for the detection of methane on Mars," Michael Mumma, senior scientist at NASA's Goddard Space Flight Center, told Seeker.
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"The engineers know how to build a good instrument. That's not the issue. The problem is they didn't have the scientific guidance needed to tell them exactly what they needed to do," he said.
Seetha Somasundaram, with ISRO's Satellite Center which designed the instrument, declined to comment and referred Seeker to ISRO spokesman Deviprasad Karnik. Karnik did not responded to requests for comment.
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Originally published on Seeker.

Source: www.space.com/34943-india-mars-orbiter-mission-methane-detector-flaw-red-planet.html

 

[Sarkar]

Yes Mr Michael Mumma we don't have the Guidance like you get from German scientist and their research papers after WWII. But don't worry we will learn that on our own as we don't like stealing others property 

 

[abhinaba]

PSLV C37 Mission is now rescheduled, new launch date is announced as 15th February.

 

[rahul1117kumar]

How ISRO plans to launch 103 satellites on a single rocket

The Indian Space Research Organisation (ISRO) will set a record when it launches 103 satellites in one go on a single rocket in the first week of February.

Explaining how all the satellites will be placed in orbit, Dr. K. Sivan, Director of the Vikram Sarabhai Space Centre (VSSC), Thiruvananthapuram, said: “The satellites will be separated from the launch vehicle in different directions. The separation angle and time of separation will be such that one satellite will not collide with another.”

The satellite separated from the launch vehicle will have a relative velocity of one metre per second. So after 1,000 seconds the distance between a satellite and the rocket will be 1,000 metres. “The satellite that gets launched first will move at a relatively faster velocity than the next satellite that is launched. Due to different relative velocities, the distance between the satellites will increases continuously but the orbit will be the same,” he said.

“When the vehicle reaches the orbital condition, we will wait for the disturbances to die down before the preparation for separation begins,” Dr. Sivan explained. At an orbital altitude of around 500 km, it would take the vehicle 90 minutes to complete one orbit. “So we have sufficient time to launch all the 103 satellites,” he added.

Even one degree difference in separation angle combined with relative velocity will ensure that no two satellites would collide. “The satellites will be injected into orbit at different locations at different angles, at different times and different orientations,” Dr. Sivan said.

In June last year, ISRO launched 20 satellites in one go. It took about 26 minutes to launch all the 20 satellites. In 2008, ISRO launched 10 satellites in a single mission. The highest number of satellites launched in a single mission so far has been 37 by Russia in 2014; NASA launched 29 satellites in one go in 2013.

ISRO’s workhorse PSLV (C37) with 103 satellites will be launched from the Satish Dhawan Space Centre in Sriharikota in Andhra Pradesh. With the exception of three satellites from India, the rest are from other countries.

How ISRO plans to launch 103 satellites on a single rocket - The Hindu

 

[abhinaba]

Milestone in cryogenic engine test paves way for GSLV-MkIII
Madhumathi D.S.
BENGALURU JANUARY 20, 2017

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Vital stage

In a few days from now, the rocket’s complete cryogenic third stage, replete with fuel tanks and systems built around the engine, will undergo its qualifying test, S. Somanath, Director of ISRO’s Liquid Propulsion Systems Centre (LPSC), Thiruvananthapuram, told The Hindu .
LPSC has designed and developed the CE20 engine. We are assembling the entire cryogenic stage, which is ready for flight. It will be sent to Sriharikota in a month’s time,” he said. The cryogenic stage is vital for a GSLV rocket as it gets its final and biggest push in space from this stage; it can take a big communications satellite to higher reaches of 36,000 km above ground. The C25 cryogenic stage was approved at an estimated Rs. 600 crore as part of the overall Rs. 2,500-crore MkIII launcher project. “Realising the CE20 engine was our target in order to achieve India’s capability to lift a four-tonne satellite to GTO (geostationary transfer orbit, around 36,000 km high),” Mr. Somanath said. “We have been longing for this for a few years. MkIII will be the future work horse after the PSLV,” he said.

Source: www.thehindu.com/todays-paper/tp-national/Milestone-in-cryogenic-engine-test-paves-way-for-GSLV-MkIII/article17064454.ece

 

[Rishithulyan]

bro, for MK-II's D3,D5,D6 & F5 missions ISRO used CUS-03 (A6), CUS-05 (A8), CUS-06 (A9) & CUS-07 (A10) respectively.

Bro, who told you that A8 engine has flown in CUS-05 of D6 mission ?

 

[abhinaba]

Bro, who told you that A8 engine has flown in CUS-05 of D6 mission ?

for info please read ISRO's annual outcome budget reports

 

[Rishithulyan]

for info please read ISRO's annual outcome budget reports

Then for your information, please note that A8 engine is yet to be flown.

 

[abhinaba]

Then for your information, please note that A8 engine is yet to be flown.

From which yearly budget/annual report you got this info ?

 

[abhinaba]

Have you read out 2012-13 report ? If not then read it thoroughly.