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#200
by
antriksh
on 28 Aug, 2015 03:09
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#201
by
seshagirib
on 28 Aug, 2015 05:45
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Why is it called a "unfurlable" antenna? when it is furled up for the launch.
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#202
by
vyoma
on 28 Aug, 2015 06:48
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Why is it called a "unfurlable" antenna? when it is furled up for the launch.
Antenna is stowed during launch, and is unfurled once satellite reaches its intended orbit. Antenna's unfurling mechanism is shown in DECU mission video.
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#203
by
antriksh
on 29 Aug, 2015 01:55
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First orbit raising operation of GSAT-6 was successfully completed by firing the Apogee Motor for 3385 seconds at 08:35hr IST on Aug 28
— ISRO (@isro) August 29, 2015
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#204
by
JohnWT
on 29 Aug, 2015 04:49
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Why is it called a "unfurlable" antenna? when it is furled up for the launch.
"unfurlable": capable of unfurling, "infurlable": not capable of being furled.
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#205
by
seshagirib
on 29 Aug, 2015 06:26
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Why is it called a "unfurlable" antenna? when it is furled up for the launch.
"unfurlable": capable of unfurling, "infurlable": not capable of being furled.
Thanks! got it now.
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#206
by
Ohsin
on 29 Aug, 2015 15:11
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Isro updating Facebook before their own Official site..
Second orbit raising operation of GSAT-6 was successfully completed by firing the Apogee Motor for 2663 seconds at 11:10:53 hr IST on Aug 29, 2015. Realised orbit is 26998 km (perigee height) by 35682 km ( apogee height) with an inclination of 0.115 degree and an orbital period of 20 hr 15 min.
Isro Facebook
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#207
by
Ohsin
on 30 Aug, 2015 04:33
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Third orbit raising operation of GSAT-6 was successfully completed by firing the Apogee Motor for 580.32 seconds at 07:46 hr IST on Aug 30, 2015. Preparation for deployment of the unfurlable antenna (UFA) is in progress
Isro FacebookEdit:
Deployment of the unfurlable antenna (UFA) is in progress.
UFA mid-hold down release successful. Primary arm deployed successfully.
UFA second hold-down release successful and pop-up confirmed.
Isro FacebookEDIT:
Deployment of the unfurlable antenna (UFA) is successfully completed!
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#208
by
vyoma
on 30 Aug, 2015 12:17
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#209
by
antriksh
on 30 Aug, 2015 12:56
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Nice!! next use of UF technology:
1) a deep space mission like Voyager where a huge high gain antenna would be required. UF technology will allow design of such antenna given volume constraints.
2) we can also build our own recon sats similar to NISAR using UFA.
3) unfurlable heat shield
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#210
by
Paul Howard
on 01 Sep, 2015 09:20
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#211
by
Targeteer
on 01 Sep, 2015 11:04
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From Facebook
ISRO - Indian Space Research Organisation
1 hr · Edited ·
GSAT-6 UPDATE :
After the third orbit raising operation of GSAT-6, realised orbit is: perigee height - 35634 km, apogee height - 35681 km, inclination 1.17 degree. Present longitude is 78 deg & satellite is drifting towards station of 83 degree.
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#212
by
Ohsin
on 02 Sep, 2015 12:54
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On board video of first stage separation and upper stage ignition!!!
Two onboard cameras were placed on the launcher - one at the second stage (GS2) looking down towards first stage (GS1) and the second on top of GS2 to look at the nozzle of the cryo stage. The initial segment of the video shows the nozzle portion of the GS2 looking down towards the top dome of the GS1 stage. The vented interstage skirt is also visible. The GS2 stage ignition followed by the GS1 separation (S139 along with four strap-ons) is clearly seen. Three strap-ons separating along with S139 and the interstage separation can also be seen. Afterwards, the screen is blank to switch between the cameras. The later portion of the video shows the magnificent ignition of the indigenous cryogenic stage.
http://www.isro.gov.in/gslv-d6/video-onboard-cameras-of-gslv-d6I think this is first instance of Isro sharing on board footage with us!
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#213
by
antriksh
on 02 Sep, 2015 13:10
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#214
by
Chris Bergin
on 06 Sep, 2015 09:45
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ISRO @isro 3m3 minutes ago
GSAT 6 has been successfully positioned in its orbital slot of 83 Deg E and colocated with INSAT 4A, GSAT 12, GAAT 10 and IRNSS1C today
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#215
by
chota
on 16 Sep, 2015 16:31
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#216
by
sanman
on 19 Sep, 2015 04:41
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#217
by
vyoma
on 19 Sep, 2015 04:52
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#218
by
Ohsin
on 19 Sep, 2015 18:32
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Any speculation on yellow flashes caught on engine bell at 5 and 12 seconds mark before separation? Also very briefly we get a glimpse of mildly glowing red engine bell @ 49 sec mark. Also at CUS separation that is Moon in background.
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#219
by
Steven Pietrobon
on 20 Sep, 2015 02:47
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