ISRO General News & Updates

  • Thread starter Thread starter abhinaba
  • Start date Start date
  • Replies Replies: Replies 208
  • Views Views: Views 41,914
Sarkar said:
Do you hv any idea about launch cost Ariane charges for this ? :huh

According to Le Gall, launching a satellite on an Ariane 5 costs around 100 million euros ($137 million). After subtracting the amount of European Space Agency subsidies to Arianespace, the per-satellite cost drops to about $100 million, he said.

In PIB note of 2015, GSAT-17 and the GSAT-18 to cost Rs 1,013.2 cr and Rs 1,022 cr, respectively (including launch services).
 
abhinaba said:
According to Le Gall, launching a satellite on an Ariane 5 costs around 100 million euros ($137 million). After subtracting the amount of European Space Agency subsidies to Arianespace, the per-satellite cost drops to about $100 million, he said.

In PIB note of 2015, GSAT-17 and the GSAT-18 to cost Rs 1,013.2 cr and Rs 1,022 cr, respectively (including launch services).

Satellite cost must be 100-150 crore. That means we are paying 850-900 crore to launch on top of Ariane that too for 3500 KG ony .  :wall :wall 

We could have launch 2 GSLV MKIII with 2*4500KG satellite at this price if it was on schedule. Waste of public money  :dodgy
 
ISRO/SAC also wasting taxpayer's money by developing satellites with ku band TPs which have no takers. For instance GSAT-8 & GSAT-16's ku band TPs are not occupied by any DTH operators.
 
SIFL develops forgings for ISRO’s GSLV–MK 3

Updated: October 7, 2016 05:42 IST | Staff Reporter 

The Steel and Industrial Forgings Limited, a public sector company owned by the State government, has developed Alpha titanium alloy hemispherical forgings for cryogenic stage (C25) of GSLV –MK 3 (Geosynchronous Satellite Launch Vehicle – Mark III) for the Indian Space Research Organisation.

Challenging task “Alpha Titanium Alloy is one of the difficult to forge materials due to its high flow stress coupled with tendency of cracking. With modified processing parameters and design innovation, the problem was eliminated. Due to this effort, direct pay load gain advantage is achieved. Thus more Transponders can be loaded in satellite,” said P.K. Mansoor, Senior Manager, Steel and Industrial Forgings Limited (SIFL). 

M.K. Sasikumar, SIFL managing director, handed over the technology development document to K. Sivan, Director, Vikram Sarabhai Space Centre, who visited the SIFL recently. VSSC Deputy Directors P.V. Venkata Krishnan and S. Aravamuthan were also present. The SIFL has been associating with the ISRO for the last 25 years for its projects, including PSLV, GSLV, Chandrayan, Mangalyaaan, relaunch vehicle and indigenously developed a number of forgings, Mr. Mansoor said. The SIFL has supplied gas bottle forgings of different sizes with a material titanium alloy, pure titanium, and inconel. An aerospace standard AS-9100-Rev-c certified organisation, the SIFL has indigenised many works for the HAL, BrahMos missile, Arjun battle tanks, DMDE and Railways, he added.

Source: SIFL develops forgings for ISRO’s GSLV–MK 3: The Hindu - Mobile edition
 
Oct 07, 2016

The first orbit raising manoeuvre of GSAT-18 has been successffully carried out by LAM Engine firing for 6040.6 sec from 03:46 Hrs IST on Oct 07, 2016.


Orbit determination Results from this LAM firing are:

  • Apogee X perigee height was changed to 35802 km X 14843 km.
  • Inclination is 1.325deg.
  • Orbital period is 15Hr 36 Min.
 
Sarkar said:
Satellite cost must be 100-150 crore. That means we are paying 850-900 crore to launch on top of Ariane that too for 3500 KG ony .  :wall :wall 

We could have launch 2 GSLV MKIII with 2*4500KG satellite at this price if it was on schedule. Waste of public money  :dodgy

As Indian Satellites are going into 6 ton category, I think Ariane launches will continue to be used as a complementary resource till atleast 2025.
 
Sarkar said:
What about using sce 200? We hv signed agreement with Russia for testing this



From Public Domain i got some statistics about ISRO's semi cryogenic project which are as follows - 

  1. SC160 stage will carry 50 tons of more propellants than the L110 stage.
  2. The efficiency of the SCE200 engine [ISP (vac): ~335 secs] is higher than the Vikas-X engines [ISP (vac): ~290 secs]

We know ISRO is aiming high to test flight a full-fledged SCE200 engine within 2018 - which itself is a big leap, then they have to finish some mammoth tasks related to integration,dynamic studies,control logics etc. etc. which are needed to qualify a new propulsion technology. With high hope i can say before 2025 it will not be ready.
 
Oct 08, 2016

The Second orbit raising manoeuvre of GSAT-18 has been successfully carried out by LAM Engine firing for sec from 11:29 hr IST on October 08, 2016


Orbit determination results from this LAM firing are:

  • apogee X perigee height was changed to 35803 km X 32518 km.
  • inclination is 0.129 deg.
  • Orbital period is 22hr 34 min
 
Oct 09, 2016

Third LAM firing of GSAT-18, for 256.17 sec has been successfully completed on October 9, 2016 starting from 10.21 hr IST


Orbit determination results from the third LAM firing are:

  • apogee X perigee height was changed to 35802km x 35294km, 
  • Inclination is 0.136deg. 
  • Orbital period now is 23hr 44m
 
Back
Top Bottom