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#260
by
Star One
on 05 Jan, 2014 14:10
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Congratulations to all at ISRO on this successful launch.
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#261
by
Phillip Clark
on 05 Jan, 2014 16:17
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USSTRATCOM has catalogued a first object (presumably the 3rd stage)
2014-001A/39498 in 160 x 35710 km x 19.41°
(The target injection orbit for GSAT-14 was:
perigee 180+/- 5 km
apogee 35975 +/- 675 km
inclination 19.3 +/- 0.1°)
To actually compare the orbits for accuracy we need to know what "Earth model" ISRO is using compared with the one used by USSTRATCOM.
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#262
by
input~2
on 05 Jan, 2014 17:05
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#263
by
Adonis1
on 05 Jan, 2014 17:17
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#264
by
AJA
on 05 Jan, 2014 17:45
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Superb launch
Very enthusiastic celebrations in the control room for this one too
Watch it on National TV live Youtube channel:
This now links to the entire 1h:27m webcast
Does anyone know if a) they did have an onboard camera and b) if there was a live downlink of this engineering camera view (pointed at the shroud), or if it was received later? There was some mention of it up-thread.
Amazing! Congrats to ISRO. I was at Sriharikota today to witness the historic launch. Electrifying excitement all over Looking forward to more successful GSLV launches.
Were you in SHAR? Is there an ISRO designated viewing area for the public - either inside or outside? Or is everyone scampering to get to the terrace of the tallest building nearest to the complex? Did you make it a point to tell them to start selling tickets for tours - for the revenue generation (small though it may be) and outreach?
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#265
by
isro-watch
on 05 Jan, 2014 19:12
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Superb launch Very enthusiastic celebrations in the control room for this one too
Were you in SHAR? Is there an ISRO designated viewing area for the public - either inside or outside? Or is everyone scampering to get to the terrace of the tallest building nearest to the complex? Did you make it a point to tell them to start selling tickets for tours - for the revenue generation (small though it may be) and outreach?
ISRO does have a theater/hall to display the launch. The launch is projected onto a screen live from the MCC. This has been for years. The tickets (known as entry pass) are not sold and rather given on a first come first serve basis to employees and their families/relatives..etc
There is also a walky-talky system which announces critical launch event from the MCC. This system is setup in many public areas especially in residential colonies(I am not sure of how many of these are setup)
Apart from these, people generally crowd places like water tanks, tall buildings etc in SHAR and also in the nearby town Sullurpeta
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#266
by
edkyle99
on 05 Jan, 2014 20:46
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The CE-7.5 indigenous cryogenic upper stage engine has a claimed 454 second specific impulse, better than the Ariane 5 ESC-A stage HM7B engine, better than the Atlas 5 Centaur RL10A-4-1 engine, better than the Long March YF75 engine, better than Japan's LE-5B-2 engine, and so on.
- Ed Kyle
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#267
by
sdsds
on 05 Jan, 2014 21:28
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USSTRATCOM has catalogued a first object (presumably the 3rd stage)
2014-001A/39498 in 160 x 35710 km x 19.41°
(The target injection orbit for GSAT-14 was:
perigee 180+/- 5 km
apogee 35975 +/- 675 km
inclination 19.3 +/- 0.1°)
Nominally the target orbit was "super-synchronous" with apogee higher than GEO; the achieved orbit was just slightly lower than GEO.My pessimistic calculation method shows the target had a delta-v to GEO of less than 1,654 m/s; the actual has a delta-v to GEO of less than 1,662 m/s.
YMMV.
(Congrats to all involved; particularly those whose work made the cryogenic third stage a success!)
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#268
by
kanaka
on 05 Jan, 2014 22:58
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#269
by
antriksh
on 06 Jan, 2014 01:36
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The CE-7.5 indigenous cryogenic upper stage engine has a claimed 454 second specific impulse, better than the Ariane 5 ESC-A stage HM7B engine, better than the Atlas 5 Centaur RL10A-4-1 engine, better than the Long March YF75 engine, better than Japan's LE-5B-2 engine, and so on.
- Ed Kyle
may be because CE7.5 is staged combustion and others are either gas generator or expander cycles
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#270
by
seshagirib
on 06 Jan, 2014 04:37
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Question:
Why was the CUS/ICE restart capability not tested by restarting the engine after releasing the S/C ?
Can this still be done, or is it too late to try it?
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#271
by
Lars_J
on 06 Jan, 2014 04:48
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They keep referring to the cryogenic stage... I assume this is a HydroLox stage?
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#272
by
input~2
on 06 Jan, 2014 05:03
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Nominally the target orbit was "super-synchronous" with apogee higher than GEO; the achieved orbit was just slightly lower than GEO.
The target orbit was not super synchronous.
The achieved orbit is what it was intended to be.
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#273
by
cave_dweller
on 06 Jan, 2014 05:52
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They keep referring to the cryogenic stage... I assume this is a HydroLox stage?
Aren't they both the same?
Cyrogenic because Hydrogen and Oxygen need to be liquified at cryogenic temperatures (below −150 °C) so they can deliver the required mass flow rate.
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#274
by
input~2
on 06 Jan, 2014 07:15
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New observations from USSTRATCOM
Epoch: January 5 at 1630UTC (about 5.5 hours after S/C separation)
Object A which could be the spacecraft:
2014-001A/39498 in 183 x 35756 km x 19.40°
Object B which could be GSLV 3rd stage:
2014-001B/39499 in 180 x 35623 km x 19.44°
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#275
by
vyoma
on 06 Jan, 2014 08:42
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GSAT-14 first orbit raising operation successfully completed.
The first orbit raising operation of GSAT-14 is planned at 0758 hrs IST on January 6, 2014. The remaining two orbit raising operations are planned on January 7 and 9, 2014 to place the satellite in geostationary orbit.
http://isro.gov.in/pressrelease/scripts/pressreleasein.aspx?Jan06_2014By the way, ISRO GSLV D5 happens to be first orbital launch of 2014
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#276
by
input~2
on 06 Jan, 2014 09:01
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GSAT-14 first orbit raising operation successfully completed.
Confirmed via ISRO post launch update:
"First orbit raising operation of GSAT-14 is successfully completed by firing the Apogee Motor for 3,134 seconds on Jan 06, 2014. Realised orbit is 8,966 km (Perigee) by 35,744 km (Apogee). "
http://isro.gov.in/gslv-d5/d5-post-updates.aspx
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#277
by
AJA
on 06 Jan, 2014 09:12
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The spacecraft's LAM performed a 3134 second burn this morning (Jan 6) at
0758 IST raising GSAT-14's
orbit to 8843 km x 35745 km, with an inclination of 7.44 deg. Two manoeuvres remain, one scheduled tomorrow (Jan 7), and another on Jan 9.
may be because CE7.5 is staged combustion and others are either gas generator or expander cycles
Asking again:
would you provide your source?EDIT:
Found a sourceISRO does have a theater/hall to display the launch. The launch is projected onto a screen live from the MCC. This has been for years. The tickets (known as entry pass) are not sold and rather given on a first come first serve basis to employees and their families/relatives..etc
There is also a walky-talky system which announces critical launch event from the MCC. This system is setup in many public areas especially in residential colonies(I am not sure of how many of these are setup)
Apart from these, people generally crowd places like water tanks, tall buildings etc in SHAR and also in the nearby town Sullurpeta
There's nothing ISRO specific about that theatre/hall. Any movie-theater in Sullurpeta (or anyone in any of those residential colonies) with a digital projector, a good sound system and an internet connection would be able to stream it - with the ISRO commentary. You say it's for family members/relatives of ISRO employees (as opposed to interested public) -- which is an outreach opportunity going abegging. Preaching to the choir and all that.
I'm talking about tours of SDSC facilities for the general public, or a "closest"/"official" viewing area. With ISRO people around to talk to them. Make a day long event of it - like the Tweetups: public lectures/an exhibition area. I'm sure they've thought about it. I'm wondering why they haven't acted on it. If someone says "security", I might become livid.
Low scientific literacy, among society as well as policy makers elected by such a society - has ALWAYS been, and still is THE security threat - to socio-economic prosperity, and consequently to life and property.
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#278
by
vyoma
on 07 Jan, 2014 09:23
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http://isro.gov.in/gslv-d5/d5-post-updates.aspxJan 07, 2014
Second orbit raising operation of GSAT-14 is successfully completed by firing the Apogee Motor for 2,629 seconds on Jan 07, 2014. Realised orbit is 32,160 km (Perigee) by 35,745 km (Apogee) with an inclination of 0.6 deg.
One more is planned on Jan 9th.
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#279
by
input~2
on 07 Jan, 2014 13:01
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Very enthusiastic celebrations in the control room for this one too 