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#80
by
Chris Bergin
on 16 Dec, 2015 11:48
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End of powered flight.
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#81
by
Chris Bergin
on 16 Dec, 2015 11:50
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#82
by
Chris Bergin
on 16 Dec, 2015 11:50
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#83
by
Chris Bergin
on 16 Dec, 2015 11:52
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Another successful mission!
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#84
by
Chris Bergin
on 16 Dec, 2015 11:53
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#85
by
Mapperuo
on 16 Dec, 2015 11:54
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#86
by
Chris Bergin
on 16 Dec, 2015 12:39
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#87
by
Ohsin
on 16 Dec, 2015 13:54
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<snip>
Monetary Value of Satellites
Teleos-1 - 3,054,240,000 INR
KentRidge - 138,678,320 INR
VELOX-CI - 542,127,620 INR
ATHENOXAT-1 - 7,627,520 INR
GALASSIA - 5,965,313 INR
VELOX-II - 17,895,938 INR
<snip>
INR stands for Indian rupee
And as per this DoS release
http://pib.nic.in/newsite/PrintRelease.aspx?relid=133386Dr Jitendra Singh informed about the successful launch of six Singapore satellites from Sriharikota to mark the Golden Jubilee of the independence of the Republic of Singapore. He further informed that this launch was agreed upon on commercial basis and the government of Singapore has paid 26 million euros for it.
That is 1,893,574,845 INR
...
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#88
by
antriksh
on 16 Dec, 2015 14:18
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Single launch multi-orbit missions, refreshing
. They must have got mission inquiries from customers involving multi-orbit capabilities.
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#89
by
vineethgk
on 16 Dec, 2015 14:35
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Would PAM-G require multiple restarts to deliver a satellite like GISAT to GEO? Maybe they have plans to test multiple restarts in the next few PSLV flights?
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#90
by
baldusi
on 16 Dec, 2015 15:47
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Congratulations to ISRO and Singapore!
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#91
by
sportyfailure
on 16 Dec, 2015 16:25
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And as per this DoS release
http://pib.nic.in/newsite/PrintRelease.aspx?relid=133386
Dr Jitendra Singh informed about the successful launch of six Singapore satellites from Sriharikota to mark the Golden Jubilee of the independence of the Republic of Singapore. He further informed that this launch was agreed upon on commercial basis and the government of Singapore has paid 26 million euros for it.
That is 1,893,574,845 INR
...
The import database only lists monetary value of satellites(like the amount insured for each paayliad and not launch insurance) and not launch costs
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#92
by
Ohsin
on 16 Dec, 2015 17:18
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That is clear but look at the comparison!
Secondary objective successful
Indian space agency ISRO on Wednesday successfully tested restarting of its Polar Satellite Launch Vehicle (PSLV) rocket after its engine was cut off during the mission to launch six Singaporean satellites, a top official said.
"The restart test was successful. The engine was fired for nearly five seconds. We will be using this technology sometime next year," Indian Space Research Organisation (ISRO) chairman A.S. Kiran Kumar told IANS.
According to him, the next three satellite launches using PSLV rocket will be navigation satellites.
After that, there will be some multiple satellite launches and this technology will be used, he added.
"The restart of the engine happened beautifully. The test was a success," S. Somnath, director of the Liquid Propulsions Systems Centre, told IANS.
According to him, the multiple burn fuel stage/engine will be used in PSLV-C35 rocket which will carry two satellites.
One satellite will be launched at an higher orbit and the other one will be at a slightly lower orbit, he said.
http://www.newindianexpress.com/states/andhra_pradesh/ISRO-Successfully-Tests-Multiple-Burn-Fuel-Engine-During-Launch-of-Six-Singaporean-Satellites/2015/12/16/article3180961.ece
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#93
by
beidou
on 16 Dec, 2015 18:22
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Was there any mention of the launch schedule for 2016 in the Chairman's speech?
Thanks.
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#94
by
input~2
on 16 Dec, 2015 19:43
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A first object has been cataloged by USSTRATCOM as Object A and also as Object G:
2015-077A or G/41172 in 400 x 573 km x 14.69°
Could be PSLV 4th stage.
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#95
by
vyoma
on 17 Dec, 2015 02:10
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http://www.isro.gov.in/update/16-dec-2015/pslv-successfully-launches-six-satellites-singaporeDec 16, 2015
PSLV Successfully Launches Six Satellites from SingaporeIn its thirty second flight conducted from Satish Dhawan Space Centre (SDSC), SHAR, Sriharikota today evening (December 16, 2015), ISRO's Polar Satellite Launch Vehicle PSLV-C29 successfully launched six satellites from Singapore, including the 400 kg TeLEOS-1, the primary satellite. The other five satellites were co. passenger payloads. PSLV-C29 launched all the six payloads into an orbit of 549 km height inclined at an angle of 15 deg to the equator. The six satellites carried by PSLV-C29 today together weighed about 624 kg at lift-off. These six satellites were launched as part of the agreement entered into between ST Electronics (Satcom & Sensor Systems), Singapore and Antrix Corporation Limited, the commercial arm of the Indian Space Research Organisation (ISRO), a government of India Company under the Department of Space (DOS). This is the eleventh flight of PSLV in ‘core-alone’ configuration (without the use of solid strap-on motors). PSLV has successfully launched 57 satellites for customers from abroad including the six Singapore satellites launched today. After a 59 hour smooth count down, the 227.6 ton PSLV-C29 lifted off from the First Launch Pad (FLP) at SDSC SHAR at 1800 hrs (6:00 pm) IST with the ignition of its first stage. The important flight events included the separation of the first stage, ignition of the second stage, separation of the payload fairing at about 117 km altitude, second stage separation, third stage ignition and separation, fourth stage ignition and cut-off. Once the intended orbit was achieved, TeLEOS-1 was deployed at about 18 min 12 seconds after lift-off. This was followed by the deployment of other five satellites, viz., Kent Ridge-1, VELOX-C1, VELOX-II, Galassia and Athenoxat-1 in quick succession in the subsequent three minutes.
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#96
by
vyoma
on 17 Dec, 2015 02:15
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Would PAM-G require multiple restarts to deliver a satellite like GISAT to GEO? Maybe they have plans to test multiple restarts in the next few PSLV flights?
I think so. Once PAM-G+spacecraft is inserted into LEO/GTO, PAM-G would need to do burns at perigee to raise orbit, and then burns at apogee to make orbit circular. Once intended orbit is reached, PAM-G would detach itself from spacecraft and then probably perform another burn to raise itself into graveyard orbit.
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#97
by
antriksh
on 17 Dec, 2015 04:23
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Would PAM-G require multiple restarts to deliver a satellite like GISAT to GEO? Maybe they have plans to test multiple restarts in the next few PSLV flights?
I think so. Once PAM-G+spacecraft is inserted into LEO/GTO, PAM-G would need to do burns at perigee to raise orbit, and then burns at apogee to make orbit circular. Once intended orbit is reached, PAM-G would detach itself from spacecraft and then probably perform another burn to raise itself into graveyard orbit.
IMHO, this restart testing has nothing to do with PAM-G, but to establish single launch multi-orbit mission capability of PSLV. PAM-G was to be used for Glonass sats. I think the restart capability can be used for OV.
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#98
by
vyoma
on 17 Dec, 2015 05:53
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Would PAM-G require multiple restarts to deliver a satellite like GISAT to GEO? Maybe they have plans to test multiple restarts in the next few PSLV flights?
I think so. Once PAM-G+spacecraft is inserted into LEO/GTO, PAM-G would need to do burns at perigee to raise orbit, and then burns at apogee to make orbit circular. Once intended orbit is reached, PAM-G would detach itself from spacecraft and then probably perform another burn to raise itself into graveyard orbit.
IMHO, this restart testing has nothing to do with PAM-G, but to establish single launch multi-orbit mission capability of PSLV. PAM-G was to be used for Glonass sats. I think the restart capability can be used for OV.
You're right.
http://www.newindianexpress.com/states/andhra_pradesh/ISRO-Successfully-Tests-Multiple-Burn-Fuel-Engine-During-Launch-of-Six-Singaporean-Satellites/2015/12/16/article3180961.ece"The restart and shut off of the fourth stage engine is done as a first step towards launching multiple satellites but in different orbits," an ISRO official told IANS, declining to be named.
Launching of multiple satellites with a single rocket is nothing new for ISRO and it has been doing that for several years. The challenge, however, is to launch several satellites at different orbits with one rocket.
"Restarting a rocket engine soon after it is shut off is a critical technology that has to be mastered. Once a rocket engine is activated, then the heat generated is very high. The trick is to cool it down in the space and to restart it at a short gap," an industry expert told IANS.
"This is entirely different from switching on and off the communication satellite's engines in the space. The interval between two restarts of a communication satellite engine will be in days. But in the case of restarting a rocket engine, the time gap will be in hours," the expert added.
"By that time the rocket's engine has to be cooled down. This part of the experiment is very critical," he explained.
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#99
by
Steven Pietrobon
on 17 Dec, 2015 05:59
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Full replay.
. They must have got mission inquiries from customers involving multi-orbit capabilities.
