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LIVE: PSLV-XL C27- SLP - IRNSS-1D - March 28, 2015 1149 UTC
by
beidou
on 30 Jun, 2014 18:51
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#1
by
vyoma
on 01 Jul, 2014 12:53
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#2
by
ss1_3
on 11 Jul, 2014 03:53
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IRNSS 1-D Payload flagoff After Successful Test & Evaluation, IRNSS-1D Payload was dispatched to ISITE/ISAC on July 01, 2014 for integration with Spacecraft.
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#3
by
vyoma
on 11 Jul, 2014 04:12
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Any idea on launch timeline? Probably after GSLV Mk3 X1?
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#4
by
johnxx9
on 11 Jul, 2014 13:28
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Any idea on launch timeline? Probably after GSLV Mk3 X1?
Since a PSLV was recently launched from FLP, assuming a minimum preparation/LV assembly time of 3 months..and factoring in one or maybe 2 months overhead...the earliest the launch could be end of October.
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#5
by
ss1_3
on 12 Jul, 2014 13:16
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1C would be followed by 1D. Going by the recent/upcoming mission timelines and Oct/Nov cyclone period, this might get delayed to early Jan next year.
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#6
by
input~2
on 15 Oct, 2014 20:56
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Per IRNSS-1C post launch speeches, this one seems to slip to January 2015
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#7
by
vineethgk
on 16 Oct, 2014 06:26
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What is the typical turn-around time required for the First Launch Pad, involving all the cleaning, maintenance works and assembling of a new rocket? 2-3 months?
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#8
by
sultanofhyd
on 16 Oct, 2014 08:36
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What is the typical turn-around time required for the First Launch Pad, involving all the cleaning, maintenance works and assembling of a new rocket? 2-3 months?
We don't know for sure, because this is the first time ISRO has taken up such a tight schedule of launches and missions.
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#9
by
hornbill2007
on 16 Oct, 2014 08:40
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Before 1D, the GSLV-MKIII test launch is likely. ISRO chief said in 45 days which will be early December ..., unless postponed. I think it will use the second launch pad. So first will be available for launch by end of December or early Jan '15
1C would be followed by 1D. Going by the recent/upcoming mission timelines and Oct/Nov cyclone period, this might get delayed to early Jan next year.
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#10
by
vyoma
on 16 Oct, 2014 09:07
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What is the typical turn-around time required for the First Launch Pad, involving all the cleaning, maintenance works and assembling of a new rocket? 2-3 months?
ISRO chairman said that the PSLV-C26 was assembled in 60 days at SDSC SHAR (around 01:14:05 mark
). Since PSLV-C26 used FLP, I guess it occupied launch pad for 60 days. And, from a
news article, we have:
Before every satellite is sent up, the launch pad needs a 45-day pre-launch ‘campaign' and a 15-day post-launch refurbishing of burnt-out systems.
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#11
by
input~2
on 18 Dec, 2014 03:59
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Launch now planned for the first week of March (source: ISRO DG)
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#12
by
vyoma
on 22 Dec, 2014 12:20
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#13
by
vyoma
on 06 Jan, 2015 06:19
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#14
by
input~2
on 09 Feb, 2015 07:36
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#15
by
Galactic Penguin SST
on 24 Feb, 2015 08:55
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Air-space closures:
A0309 / 15 - PSLV-C27 ROCKET LAUNCH FROM SHAR RANGE, SRIHARIKOTA WILL TAKEPLACE AS PER FLW DETAILS.THE LAUNCH WILL BE ON ANY ONE OF THE DAY DRG THIS PERIOD.ACTUAL DATE OF LAUNCH WILL BE INTIMATED 24 HR IN ADVANCE THROUGH A SEPARATE NOTAM . LAUNCH PAD COORD: 1343.2N 08013.8E NO FLT IS PERMITTED OVER THE DNG ZONE. 1.DNG ZONE 1 A CIRCLE OF 10NM RADIUS AROUND THE LAUNCHER 2.DNG ZONE 2 A RECTANGULAR AREA BOUNDED BY: 1330N 08030E 1350N 08035E 1335N 08130E 1315N 08125E 3.DNG ZONE 3 A RECTANGULAR AREA BOUNDED BY: 1300N 08210E 1330N 08215E 1255N 08405E 1225N 08400E 4.DNG ZONE 4 A RECTANGULAR AREA BOUNDED BY: 1220N 08405E 1300N 08415E 1245N 08510E 1205N 08500E 5.DNG ZONE 5 A RECTANGULAR AREA BOUNDED BY: 1110N 08825E 1145N 08835E 1135N 08910E 1100N 08900E 6.DNG ZONE 6 A RECTANGULAR AREA BOUNDED BY: 0915N 09445E 1005N 09505E 0945N 09600E 0855N 09540E 7.DNG ZONE 7 AN AREA BOUNDED BY: 1900S 13300W 1700S 13300W 1430S 11500W 0830S 09300W 1030S 09300W 1630S 11500W. ROUTES AFFECTED IN CHENNAI FIR ARE: L518 N571 P761 N877 W20 A465 P628 Q10 Q11 V003 V004 V009 AND V011 CLOSURE / ALTERNATE ROUTINGS: I) N571 NOT AVBL BTN DORAM AND BIKEN ALTN ROUTE: DORAM-B466-MMV VOR-DCT-BIKEN-N571 (BIDIRECTIONAL) II) P761 NOT AVBL MMV VOR AND PPB VOR ALTN ROUTE: MMV VOR-DCT-BIKEN-P762-PPB VOR (BIDIRECTIONAL) III) N877 NOT AVBL BTN ORARA AND LAGOG ALTN ROUTE: ORARA-DCT-BASOP-DCT- LAGOG (BIDIRECTIONAL) IV) W20 NOT AVBL BTN MMV VOR AND BODEL ALTN ROUTE: MMV VOR-TR319 / 139DEG-53NM-TTP VOR-TR357 / 177DEG -81NM-BODEL (BIDIRECTIONAL) V) A465 NOT AVBL BTN MMV VOR AND DOKET ALTN ROUTE: MMV VOR-TR 319/139 DEG-53NM-TTP VOR-TR035 / 215DEG -26NM-POINT'A '(140004.8N 0794709.7E) -TR054 / 234DEG-151NM- DOKET (BIDIRECTIONAL) VI) P628 NOT AVBL BTN IGREX AND PPB VOR (DUE DNG ZONE 6) ALTN ROUTE: EMRAN-DCT-AGEGA-DCT-PPB VOR (WESTBOUND ONLY) VII) ATS ROUTES L518 Q10 Q11 V003 V004 V009 AND V011 NOT AVBL. GND - UNL) END PART 2 OF 2, DLY 1100-1500, 09 MAR 11:00 2015 UNTIL 08 APR 15:00 2015. CREATED: 24 FEB 06:28 2015
So the launch would be in the evening local time. Someone may be able to find a launch time from Indian local sources....
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#16
by
Galactic Penguin SST
on 28 Feb, 2015 00:34
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Anyone got the launch time for March 9?
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#17
by
Ohsin
on 28 Feb, 2015 09:46
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#18
by
Ohsin
on 02 Mar, 2015 03:41
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http://www.thehindu.com/sci-tech/science/countdown-to-irnss-1d-on-march-7/article6949915.eceThe 59-hour countdown for the launch of IRNSS 1D satellite, which will help India kick-start functioning of indigenous navigation system on a par with the U.S.’ Global Positioning System (GPS), will commence at 7.35 am on March 7
The launch is scheduled at the first launch pad of Satish Dhawan Space Centre at Sriharikota at 6.35 p.m. on March 9, a senior ISRO official told The Hindu.
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#19
by
Galactic Penguin SST
on 02 Mar, 2015 03:47
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http://www.thehindu.com/sci-tech/science/countdown-to-irnss-1d-on-march-7/article6949915.ece
The 59-hour countdown for the launch of IRNSS 1D satellite, which will help India kick-start functioning of indigenous navigation system on a par with the U.S.’ Global Positioning System (GPS), will commence at 7.35 am on March 7
The launch is scheduled at the first launch pad of Satish Dhawan Space Centre at Sriharikota at 6.35 p.m. on March 9, a senior ISRO official told The Hindu.
That would be 13:05 UTC on March 9.
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#20
by
Galactic Penguin SST
on 04 Mar, 2015 07:23
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Hmm....zero updates from ISRO at T-5 days? This is a first for them since a few years ago....
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#21
by
Galactic Penguin SST
on 04 Mar, 2015 09:54
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Hmm....zero updates from ISRO at T-5 days? This is a first for them since a few years ago....
As soon as I posted ISRO posted an update....that the launch has been postponed due to a transmitter problem on IRNSS-1D. 
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Launch of PSLV-C27 with IRNSS-1D postponed
The launch of India’s fourth Navigation Satellite IRNSS-1D onboard PSLV-C27 was originally scheduled for March 09, 2015 from Satish Dhawan Space Centre, Sriharikota. During the integrated electrical checks of Launch Vehicle along with Satellite after the closure of heat shield on March 03, 2015, an anomaly was observed in one of the telemetry transmitters of the Satellite. In order to resolve the technical anomaly through further test, simulation and analysis, the launch of PSLV-C27 with IRNSS-1D has been postponed.
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#22
by
input~2
on 05 Mar, 2015 06:49
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Now the satellite has to be dismounted from the Polar Satellite Launch Vehicle-27 rocket and moved back to its testing location where it will be rectified.
source
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#23
by
vineethgk
on 05 Mar, 2015 13:26
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Wasn't a similar issue reported before IRNSS 1C launch too?
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#24
by
vyoma
on 10 Mar, 2015 07:33
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#25
by
Chris Bergin
on 11 Mar, 2015 00:59
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Do we know what the window is for the 15th? Around 13:00 UTC I'm guessing?
Whooops, didn't read the post above (classic mistake of not reading the entire thread
)
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#26
by
Galactic Penguin SST
on 11 Mar, 2015 03:01
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Do we know what the window is for the 15th? Around 13:00 UTC I'm guessing?
I thought the article above says "end of March"? It definitely won't be on the 15th.
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#27
by
input~2
on 11 Mar, 2015 05:49
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Launch now planned for March 29 at 1300UTC
source (in Telugu)
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#28
by
input~2
on 12 Mar, 2015 18:35
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#29
by
vyoma
on 16 Mar, 2015 07:15
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http://gadgets.ndtv.com/science/news/isros-fourth-navigation-satellite-to-be-mated-with-rocket-this-week-670964The Indian space agency is hoping to mate the country's fourth regional navigation satellite around March 19, after replacing a faulty transmitter on Monday, said a senior official.
"The new transmitter is expected to be fixed in the satellite and tested. Then the fully assembled satellite will be mated with the rocket," M.Y.S. Prasad, director of Satish Dhawan Space Centre (SDSC) told IANS over phone.
The transmitter from Isro Satellite Centre, located in Bangalore and that is part of Indian Space Research Organisation (Isro), reached SDSC on Sunday.
After mating the satellite with the rocket, a full system check would be carried out and then the rocket launch date would be fixed.
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#30
by
Galactic Penguin SST
on 16 Mar, 2015 07:26
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http://gadgets.ndtv.com/science/news/isros-fourth-navigation-satellite-to-be-mated-with-rocket-this-week-670964
The Indian space agency is hoping to mate the country's fourth regional navigation satellite around March 19, after replacing a faulty transmitter on Monday, said a senior official.
"The new transmitter is expected to be fixed in the satellite and tested. Then the fully assembled satellite will be mated with the rocket," M.Y.S. Prasad, director of Satish Dhawan Space Centre (SDSC) told IANS over phone.
The transmitter from Isro Satellite Centre, located in Bangalore and that is part of Indian Space Research Organisation (Isro), reached SDSC on Sunday.
After mating the satellite with the rocket, a full system check would be carried out and then the rocket launch date would be fixed.
Please tell them to refrain from scheduling the launch between March 25-27 - I don't think Chris and me and others can withstand at least 6 launches in 3 days.
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#31
by
vyoma
on 17 Mar, 2015 03:35
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#32
by
input~2
on 19 Mar, 2015 16:48
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#33
by
beidou
on 19 Mar, 2015 20:39
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I'm curious the launch brochure has not been released yet...
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#34
by
input~2
on 21 Mar, 2015 12:28
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NOTAM
A0412/15 - PSLV-C27 ROCKET LAUNCH FROM SHAR RANGE, SRIHARIKOTA WILL TAKE PLACE AS PER FLW DETAILS. THE LAUNCH WILL BE ON ANY ONE OF THE DAY DRG THIS PERIOD. ACTUAL DATE OF LAUNCH WILL BE INTIMATED 24 HR IN ADVANCE THROUGH A SEPARATE NOTAM. LAUNCH PAD COORD: 1343.2N 08013.8E NO FLT IS PERMITTED OVER THE DNG ZONE. 1.DNG ZONE-1 A CIRCLE OF 10NM RADIUS AROUND THE LAUNCHER 2.DNG ZONE-2 A RECTANGULAR AREA BOUNDED BY: 1330N 08030E 1350N 08035E 1335N 08130E 1315N 08125E 3.DNG ZONE-3 A RECTANGULAR AREA BOUNDED BY: 1300N 08210E 1330N 08215E 1255N 08405E 1225N 08400E 4.DNG ZONE-4 A RECTANGULAR AREA BOUNDED BY: 1220N 08405E 1300N 08415E 1245N 08510E 1205N 08500E 5.DNG ZONE-5 A RECTANGULAR AREA BOUNDED BY: 1110N 08825E 1145N 08835E 1135N 08910E 1100N 08900E 6.DNG ZONE-6 A RECTANGULAR AREA BOUNDED BY: 0915N 09445E 1005N 09505E 0945N 09600E 0855N 09540E 7.DNG ZONE-7 AN AREA BOUNDED BY: 1900S 13300W 1700S 13300W 1430S 11500W 0830S 09300W 1030S 09300W 1630S 11500W ROUTES AFFECTED IN CHENNAI FIR ARE: L518 N571 P761 N877 W20 A465 P628 Q10 Q11 V003 V004 V009 AND V011 END PART 1 OF 2.
1100-1500, 28 MAR 11:00 2015 UNTIL 08 APR 15:00 2015. CREATED: 13 MAR 05:29 2015
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#35
by
vyoma
on 23 Mar, 2015 09:00
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#36
by
Galactic Penguin SST
on 23 Mar, 2015 12:05
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#37
by
Galactic Penguin SST
on 23 Mar, 2015 12:07
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#38
by
vyoma
on 26 Mar, 2015 08:02
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The 59 and half hour count-down of PSLV-C27/IRNSS-1D Mission has started at 05:49 hr IST on Thursday, March 26, 2015
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#39
by
vyoma
on 26 Mar, 2015 08:03
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26-03-2015
PSLV-C27/IRNSS-1D Mission Update:
- Mono Methyl Hydrazine (MMH) propellant filling operation of fourth stage (PS4) of PSLV-C27 has commenced at 09:40 hr (IST)
- Mono Methyl Hydrazine (MMH) propellant filling operation of fourth stage (PS4) of PSLV-C27 has been completed. Preparations for Mixed Oxides of Nitrogen (MON-3) oxidiser filling operation are under progress.
- Mixed Oxides of Nitrogen (MON-3) oxidiser filling operation of Fourth Stage (PS4) of PSLV-C27 has commenced at 16:15 hr (IST)
- Mixed Oxides of Nitrogen (MON-3) oxidiser filling operation of Fourth Stage (PS4) of PSLV-C27 has been completed by 19:00 hr (IST)
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#40
by
vyoma
on 27 Mar, 2015 06:16
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27-03-2015
PSLV-C27/IRNSS-1D Mission Update:
- PSLV-C27/IRNSS-1D countdown operations are progressing normally. Propellant filling operation of second stage (PS2) of PSLV-C27 will be initiated by midnight of today.
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#41
by
Chris Bergin
on 27 Mar, 2015 23:51
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Moved for live coverage!
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#42
by
seshagirib
on 28 Mar, 2015 02:59
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#43
by
vyoma
on 28 Mar, 2015 05:17
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#44
by
seshagirib
on 28 Mar, 2015 10:11
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^Looks like the webcast will begin at 16:50 (IST) not 16:30.
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#45
by
Ohsin
on 28 Mar, 2015 10:18
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On television coverage has begun.
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#46
by
Chris Bergin
on 28 Mar, 2015 10:21
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I got this one to work:
http://webcast.gov.in/live/ - but it's still in the daily news.
If you see coverage on any other link, please post (and we'll take as many screenshots as possible).
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#47
by
Chris Bergin
on 28 Mar, 2015 10:22
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#48
by
vyoma
on 28 Mar, 2015 10:22
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#49
by
Chris Bergin
on 28 Mar, 2015 10:23
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They are having a quick update.
All normal at T-30 mins.
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#50
by
Chris Bergin
on 28 Mar, 2015 10:25
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Thanks! That's working for me now
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#51
by
Chris Bergin
on 28 Mar, 2015 10:28
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Coming up on T-20 mins.
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#52
by
Chris Bergin
on 28 Mar, 2015 10:31
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There's the seven sat constellation.
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#53
by
vyoma
on 28 Mar, 2015 10:32
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T - 18 minutes. DECU video about IRNSS going on.
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#54
by
Chris Bergin
on 28 Mar, 2015 10:32
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#55
by
vyoma
on 28 Mar, 2015 10:33
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#56
by
Chris Bergin
on 28 Mar, 2015 10:34
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#57
by
Chris Bergin
on 28 Mar, 2015 10:36
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Sad not to see the usual sight of Chairman Radhakrishnan (who's left).
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#58
by
Chris Bergin
on 28 Mar, 2015 10:36
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Into the automated count.
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#59
by
Mark McCombs
on 28 Mar, 2015 10:38
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#60
by
vyoma
on 28 Mar, 2015 10:40
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#61
by
AJA
on 28 Mar, 2015 10:42
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There you go Chris. I think the ISRO cameraman heard your lament about not being able to see the former Chairman.
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#62
by
Chris Bergin
on 28 Mar, 2015 10:42
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Sad not to see the usual sight of Chairman Radhakrishnan (who's left).
Oh I think I see him in the gallery, observing!
Yep, there he is!
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#63
by
vyoma
on 28 Mar, 2015 10:43
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#64
by
Chris Bergin
on 28 Mar, 2015 10:44
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T-5 mins.
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#65
by
Chris Bergin
on 28 Mar, 2015 10:44
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#66
by
AJA
on 28 Mar, 2015 10:45
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Weather's green on ground (15 m/s allowable against 8 m/s observed) as well as high altitude winds. No lightning activity. Beautiful day.
EDIT:
Some cool information on allowable meteorological conditions for launch. The Day Of Launch Inertial Loads Update measurement. (Yes, I stole the acronym. Sue me
) 4 balloons released at
T -2:45 hrs
T -2:20 hrs
T -2:00 hrs
T -1:40 hrs
Electric field limit < 1000 V/m.
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#67
by
vyoma
on 28 Mar, 2015 10:46
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Favourable weather. Wind speeds are benign.
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#68
by
Chris Bergin
on 28 Mar, 2015 10:46
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Explaining weather balloons.
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#69
by
Chris Bergin
on 28 Mar, 2015 10:47
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#70
by
Chris Bergin
on 28 Mar, 2015 10:48
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#71
by
vyoma
on 28 Mar, 2015 10:48
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#72
by
Chris Bergin
on 28 Mar, 2015 10:49
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#73
by
Chris Bergin
on 28 Mar, 2015 10:50
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#74
by
Chris Bergin
on 28 Mar, 2015 10:50
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#75
by
AJA
on 28 Mar, 2015 10:50
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Is this the first time we've been able to see strap-on jettison?
I was rooting for the
EDIT: Korolev Tsiolkovsky cross (but that didn't seem to materialise
- it probably doesn't happen on the PSLV because of the number and the geometry of the strap-ons). Commentator said visibility was so good that we might've been able to see S1 sep, but the cameraman slewed to a shot of smoke plume. :-/
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#76
by
Mark McCombs
on 28 Mar, 2015 10:51
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#77
by
Chris Bergin
on 28 Mar, 2015 10:51
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Staging. 1-2. Behind the clouds.
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#78
by
Chris Bergin
on 28 Mar, 2015 10:52
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#79
by
Chris Bergin
on 28 Mar, 2015 10:52
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Fairing jettison.
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#80
by
Chris Bergin
on 28 Mar, 2015 10:53
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#81
by
Chris Bergin
on 28 Mar, 2015 10:53
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Staging. 2-3.
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#82
by
Chris Bergin
on 28 Mar, 2015 10:54
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Third stage nominal performance.
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#83
by
vyoma
on 28 Mar, 2015 10:54
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#84
by
Chris Bergin
on 28 Mar, 2015 10:54
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T+300 seconds. All nominal.
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#85
by
vyoma
on 28 Mar, 2015 10:55
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Is this the first time we've been able to see strap-on jettison? I was rooting for the Tsiolkovsky cross, but that didn't seem to materialise. Commentator said visibility was so good that we might've been able to see S1 sep, but the cameraman slewed to a shot of smoke plume. :-/
Strap-on separation.
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#86
by
Mark McCombs
on 28 Mar, 2015 10:59
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#87
by
Chris Bergin
on 28 Mar, 2015 10:59
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Staging. 3-4.
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#88
by
vyoma
on 28 Mar, 2015 11:00
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PS3 separated, PS4 ignited.
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#89
by
vyoma
on 28 Mar, 2015 11:02
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#90
by
Chris Bergin
on 28 Mar, 2015 11:03
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Nominal on the final leg.
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#91
by
Chris Bergin
on 28 Mar, 2015 11:04
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#92
by
Chris Bergin
on 28 Mar, 2015 11:04
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100 seconds of powered flight to go.
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#93
by
Chris Bergin
on 28 Mar, 2015 11:08
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#94
by
Chris Bergin
on 28 Mar, 2015 11:08
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Cut off.
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#95
by
vyoma
on 28 Mar, 2015 11:08
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PS4 thrust cut-off. Injection conditions achieved.
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#96
by
Chris Bergin
on 28 Mar, 2015 11:09
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And S/C Sep!
Congrats to all involved!
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#97
by
vyoma
on 28 Mar, 2015 11:09
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IRNSS-1D separated. Precise mission.
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#98
by
Chris Bergin
on 28 Mar, 2015 11:11
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#99
by
Chris Bergin
on 28 Mar, 2015 11:12
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#100
by
vyoma
on 28 Mar, 2015 11:12
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#101
by
AJA
on 28 Mar, 2015 11:13
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ISRO Chairman addressing the gathering.
Let me congratulate the entire ISRO team for the 28th consecutive successful mission of the PSLV
PSLV launch system shows that it has come of age, despite the small hiccup with the satellite, in one of its subsystems.
Would like to congratulate the ISRO team for getting the Gandhi Peace Prize, announced yesterday.
Recognition of the work ISRO has been doing since decades to apply space technology to solving the problems of the country.
At the same time, the country has placed a great responsibility on ISRO.
---
Project DirectorCompleted the minimum essential requirement of four satellites to enable IRNSS operation.
Orbital injection details: 282.5 km (284 km) x 20,644 km (20,650 km).
Inclination, and AOP are within specified. One order better than the expected dispersion.
With this mission 4 successful missions in one financial year.
Mission after mission, we've been improving through rigorous reviews.(Bravo. Reviews, and analysis, not
only after anomalous events)
The next PSLV in June (UK satellites on board)
The next one after that is the 5th IRNSS one.
---
Director of ISAC (?)
Transmitter on IRNSS turned on.
S/C is power positive. All arrays deployed.
Pyro also fired, Thrust control enabled, in 3 axis control.
Refers to this week being a navigation week.
For the GNSS, GPS and IRNSS launches this week.
Thanks everyone - from the technician who welds plumb lines, to someone who solders a circuit, to everyone involved.
---
Director VSSC (M. Chandradathan)
"Every successful mission is an occasion to rejoice, and to accumulate more energy to come out with more power, to pursue further goals."
2015 is a very critical year, to have a minimum of 5 more missions this year.
3 more PSLVs, the GLSV-D6 with the indigenous cryo engine (CUS-25?), and... <drum roll> RLV-TD!
Confident on ability to deliver. Says that 1/3rd of all staff at all ISRO centres comprise the youth, and comments on the energy they bring.
Thanks the govt. for support, and exhorts people to continue to keep ISRO at the top of the rankings of government agencies.
---
Shivakumar
IRNSS should be activated by April.
---
Director LPSC (K Sivan)
It's not only a result of the PSLV maturity, but also a result of the tireless efforts and many sleepless nights. (Wait. what? If it's mature, then why sleepless nights)
Another important thing that he wants to declare, with the permission of the Chairman... The first integrated test of the CUS-25 was conducted last week, and the engine has been tested to the rated level. Now working toward extending the duration to 200s and then to flight duration. The C-25 is on fast-track mode.
To realise the flight of the GSLV Mk-III within the next two years.
In addition to the ongoing pursuit of engines that power higher payloads to orbit.
---
(I skipped the address of a few others, with mundanity
)
Now current Chairman calling on his predecessor to convey a few words... Ahh. Indian work culture and seniority reverence. When will you de-orbit?
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#102
by
Mark McCombs
on 28 Mar, 2015 11:13
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Congratulations to ISRO for the successful launch and deployment.
Man, those solids really scoot don't they?
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#103
by
vyoma
on 28 Mar, 2015 11:14
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With 4 IRNSS satellites, achieved minimum required configuration for IRNSS navigation service.
IRNSS-1D solar panels depolyed, thrusters working fine, signals acquired at Biak mission control center.
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#104
by
Galactic Penguin SST
on 28 Mar, 2015 14:11
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Looks like ISRO has become the latest space organization to embrace high-res photos.
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#105
by
input~2
on 28 Mar, 2015 17:51
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2 objects have been catalogued by USSTRATCOM
2015-018A/40547 in 278 x 20567 km x 19.22° (presumably the S/C)
2015-018B/40548 in 278 x 20898 x 19.08° (presumably PSLV 4th stage)
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#106
by
arun289
on 28 Mar, 2015 18:35
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#107
by
robertross
on 28 Mar, 2015 19:13
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My congrats to India on this successful launch, and many thanks to those here for the coverage.
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#108
by
zubenelgenubi
on 28 Mar, 2015 21:47
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With 4 IRNSS satellites, achieved minimum required configuration for IRNSS navigation service.
The prime reason for the cadence and payloads of recent PSLV launches is to initiate navigation service?
Satellite Launch
IRNSS 1A July 1, 2013
MOM November 5, 2013
IRNSS 1B April 4, 2014
SPOT 7, et al June 30, 2014
IRNSS 1C October 15, 2014
IRNSS 1D March 28, 2015
(The exceptions are MOM and SPOT--but MOM had a brief launch window to reach Mars, and SPOT was a launch revenue source.)
If the navigation service is a priority, why not launch 1E, 1F, and 1G as the next three PSLV payloads this year?
Are there other considerations?
Curious,
Zubenelgenubi
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#109
by
baldusi
on 29 Mar, 2015 14:03
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They could have a single team that works sequentially on testing, preparation and integration. Then you have the LEOP and commissioning that's also better done sequentially. Why double the teams for just 7 birds?
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#110
by
seshagirib
on 29 Mar, 2015 14:29
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If the navigation service is a priority, why not launch 1E, 1F, and 1G as the next three PSLV payloads this year?
Are there other considerations?
Curious,
Zubenelgenubi
From the "Indian Launch Schedule" thread , the remaining PSLV launches this year are:
June - PSLV C28 - 3 DMC3(UK)
- PSLV(XL) C29 - IRNSS-1E
Q4 - PSLV (XL) C34 SLP- AstroSat-1 + LAPAN-A2 (Indon.) + TeLEOS-1(Sing.) + SkySat#
of these the DMC3(UK) and the LAPAN-A2 etc launches earn revenue.
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#111
by
s^3
on 29 Mar, 2015 21:17
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Reasons cud be:
1. As pointed out by Baldusi .. There IS one team ( we can see same faces in every PSLV launch video manning same consoles .. except payload specialists )
2. Only 2 Launch assembly facilities hinder back to back launches in a very short period
3. Surely third party launches can't be sidelined for own 'secondary' missions .. Sky will not fall if IRNSS system is not up in immediate future.
4. IRNSS has a totally different orbit so they can neither be clubbed with Polar nor with 'PSLV launched GSO' payloads. They call for dedicated launch.
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#112
by
Steven Pietrobon
on 30 Mar, 2015 06:35
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Launch replay.
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#113
by
Galactic Penguin SST
on 30 Mar, 2015 06:46
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Launch replay.
Really reminds me of a Delta II launch (and the capability of the PSLV is close to DII's):
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#114
by
vineethgk
on 30 Mar, 2015 08:31
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Just to add in my guess, maybe there was a bit of pressure from the military/security establishment to have a minimum working independent navigation system ASAP for their needs. Perhaps that has been achieved with this launch..
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#115
by
Ohsin
on 30 Mar, 2015 08:33
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The first orbit raising operation of IRNSS-1D is successfully completed by firing the Apogee Motor at 17 28 hrs IST, on March 29, 2015.
SourceThe first orbit raising operation of IRNSS-1D is successfully completed by firing the Apogee Motor at 17 28 hrs IST, on March 29, 2015. The orbital parameters are: Perigee Altitude: 314 km, Apogee Altitude: 35653 km, Orbit period: 10hr 30min.
Source
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#116
by
Ohsin
on 30 Mar, 2015 11:46
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#117
by
Ohsin
on 30 Mar, 2015 15:11
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The second orbit raising operation of IRNSS-1D is successfully completed by firing the Apogee Motor for 28 min 23 sec. at 09 07 hrs IST, on March 30, 2015. The orbital parameters are: Perigee Altitude: 8459 km, Apogee Altitude: 35565 km, Orbit period: 13hr 13min.
Source
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#118
by
Stan Black
on 30 Mar, 2015 15:41
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Reasons cud be:
1. As pointed out by Baldusi .. There IS one team ( we can see same faces in every PSLV launch video manning same consoles .. except payload specialists )
2. Only 2 Launch assembly facilities hinder back to back launches in a very short period
3. Surely third party launches can't be sidelined for own 'secondary' missions .. Sky will not fall if IRNSS system is not up in immediate future.
4. IRNSS has a totally different orbit so they can neither be clubbed with Polar nor with 'PSLV launched GSO' payloads. They call for dedicated launch.
And at some point they will expire and need to be replaced. Read somewhere that the original plan was to spread the launches once every six months, and to retain two ground spares. Should be easier to maintain the constellation?
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#119
by
baldusi
on 30 Mar, 2015 16:32
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Reasons cud be:
1. As pointed out by Baldusi .. There IS one team ( we can see same faces in every PSLV launch video manning same consoles .. except payload specialists )
2. Only 2 Launch assembly facilities hinder back to back launches in a very short period
3. Surely third party launches can't be sidelined for own 'secondary' missions .. Sky will not fall if IRNSS system is not up in immediate future.
4. IRNSS has a totally different orbit so they can neither be clubbed with Polar nor with 'PSLV launched GSO' payloads. They call for dedicated launch.
And at some point they will expire and need to be replaced. Read somewhere that the original plan was to spread the launches once every six months, and to retain two ground spares. Should be easier to maintain the constellation?
Current GSO comm birds have what, 10 year of expected life? That would require the replacement of IRNSS-1A by 2023, probably ready by 2020. If the last bird is IRNSS-1G and goes up by 2017, they will probably be working on the second version for straight replacement.
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#120
by
MattMason
on 30 Mar, 2015 16:35
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My, it's been a very busy 5 days in spaceflight.
Congrats to the Indian government for a successful launch!
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#121
by
Ohsin
on 31 Mar, 2015 13:45
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The third orbit raising operation of IRNSS-1D is successfully completed by firing the Apogee Motor for 22 minutes, at 11 37 hrs IST, on March 31, 2015. The orbital parameters are: Perigee Altitude: 23881 km, Apogee Altitude: 35569 km. Orbit period: 18hr 57min.
SourceEDIT: 1 April 2015
The fourth and final orbit raising operation of IRNSS-1D is successfully completed by firing the Apogee Motor for 493 seconds, at 06 42 hrs IST, on on April 01, 2015. The orbital parameters are: Perigee Altitude: 35556 km, Apogee Altitude: 35603 km, Inclination: 30.463 degree and Orbit period: 23hr 45min .
Source
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#122
by
Ohsin
on 11 Apr, 2015 12:45
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Apr 11, 2015
IRNSS-1D post launch update: Station acquisition manoeuvres for IRNSS 1D were successfully carried out.
The health of IRNSS-1D spacecraft is normal.
Station acquisition manoeuvres for IRNSS 1D were successfully carried out. The performance is nominal. IRNSS-1D has been positioned at its assigned orbital slot of 111.75 deg E. The orbital period is 23 hr 55 min 59 sec. In Orbit Testing of the satellite is in progress.
Source
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