Author Topic: FAILURE: IRNSS-1H, PSLV C39, SLP, August 31, 2017 (13:30 UTC)  (Read 39738 times)

Offline beidou

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Quote
The ISRO is readying one of the two back-up navigation satellites — IRNSS-1H — to replace it in space in the second half of this year. IRNSS-1A was launched in July 2013 and has an expected lifespan of 10 years.
http://gpsworld.com/3-atomic-clocks-fail-on-1-indian-satellite-replacement-prepped/
« Last Edit: 08/31/2017 02:12 PM by Chris Bergin »

Offline vyoma

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Re: IRNSS-1H, PSLV C3x, FLP, 2nd Half of 2017
« Reply #1 on: 05/09/2017 06:57 PM »
IRNSS-1H payload flagged off from SAC on 4th May 2017.

http://www.sac.gov.in/SACSITE/images/IRNSS_1H_Final.jpg

Offline zubenelgenubi

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Offline chewi

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Re: IRNSS-1H, PSLV C3x, FLP, 2nd Half of 2017
« Reply #3 on: 06/26/2017 05:10 AM »

Offline isro-watch

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Re: IRNSS-1H, PSLV C39, FLP, August 2017
« Reply #4 on: 07/17/2017 03:04 AM »
Noticed a large truck on the Sriharikota Road with LPSC written on its back in the first week of July. I surmise, in all likelihood, it was the 2nd stage of PSLV for the August 2017 launch.

Offline vineethgk

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Re: IRNSS-1H, PSLV C39, FLP, August 2017
« Reply #5 on: 08/01/2017 10:26 AM »
PSLV-C39 carrying IRNSS-1H targeted for launch by Aug-end, exact launch date yet to be finalized according to ISRO sources
Quote
"IRNSS-1H on board PSLV-C39 will be launched by the end of this month. The exact date will be decided shortly," a senior ISRO official told PTI.

Offline input~2

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Re: IRNSS-1H, PSLV C39, FLP, August 28, 2017
« Reply #6 on: 08/02/2017 01:09 PM »
Launch is planned for August 28

Offline vineethgk

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Re: IRNSS-1H, PSLV C39, FLP, August 28, 2017
« Reply #7 on: 08/10/2017 03:54 PM »
IRNSS-1H to move to Sriharikota on Aug-12
Quote
"The satellite is ready to move from our centre to Sriharikota on August 12 on a special vehicle for integration with the rocket at the space centre," said Annadurai on the margins of a technology event.

The launch authorization board will decide on the date and time after all the checks were completed during the window for the launch schedule.

Offline vyoma

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Re: IRNSS-1H, PSLV C39, FLP, August 28, 2017
« Reply #8 on: 08/10/2017 10:24 PM »
http://www.newindianexpress.com/nation/2017/aug/10/isro-to-launch-back-up-navigation-satellite-on-august-31-1640952.html

Quote
CHENNAI: India will launch a backup navigation satellite this month end as a replacement for the IRNSS-1A satellite whose three atomic clocks have failed. Reliable sources say the launch is tentatively fixed for August 31 on board PSLV-C39.

Quote
“Four satellites are enough to deliver robust navigation services. Even if IRNSS-1A is taken off the NavIC constellation, six are still operational. As per the original plan, we have two spares ready for contingency measures. So, one of them is being flown out this month,” a senior official said.

Offline input~2

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Offline input~2

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Re: IRNSS-1H, PSLV C39, FLP, August 28, 2017
« Reply #10 on: 08/14/2017 04:07 PM »
« Last Edit: 08/14/2017 04:10 PM by input~2 »

Offline input~2

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Re: IRNSS-1H, PSLV C39, FLP, August 31, 2017
« Reply #11 on: 08/19/2017 01:15 PM »
Launch now planned for August 31
source

Offline vineethgk

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Re: IRNSS-1H & cubesats, PSLV C39, FLP, August 31, 2017
« Reply #12 on: 08/23/2017 10:45 AM »
PSLV-C39/IRNSS-1H Mission is scheduled to be launched on Aug 31, 2017 at 18:59 Hrs from SDSC SHAR, Sriharikota
Quote
The next mission, PSLV-C39 will launch IRNSS-1H navigation satellite, on August 31, 2017. IRNSS-1H will augment the existing seven satellites of NavIC constellation.
« Last Edit: 08/23/2017 10:49 AM by vineethgk »

Offline vineethgk

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Re: IRNSS-1H & cubesats, PSLV C39, FLP, August 31, 2017
« Reply #13 on: 08/23/2017 10:53 AM »

Offline vineethgk

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Offline vineethgk

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Launch now planned for August 31
source
@Mods, the title of the thread reads 'IRNSS-1H & cubesats...' which I believe is incorrect as this is a dedicated GTO mission with no co-passengers.

edit by mod: done! Thks
« Last Edit: 08/24/2017 09:17 AM by input~2 »

Offline vineethgk

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PSLV-C39/IRNSS-1H Mission is scheduled to be launched on Aug 31, 2017 at 18:59 Hrs from SDSC SHAR, Sriharikota
Quote
The next mission, PSLV-C39 will launch IRNSS-1H navigation satellite, on August 31, 2017. IRNSS-1H will augment the existing seven satellites of NavIC constellation.
This should be 13:29 UTC.

Offline input~2

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Re: IRNSS-1H, PSLV C39, FLP, August 31, 2017 (13:29 UTC)
« Reply #17 on: 08/27/2017 09:21 AM »
A1683/17 - PSLV C39 ROCKET LAUNCH FM 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 24HR IN ADVANCE THROUGH A SEPERATE NOTAM. LAUNCH PAD COORD: 134312N 0801348E NO FLT IS PERMITTED OVER THE DNG ZONE. A. DNG ZONE -1 IS A CIRCLE OF 10NM AROUND THE LAUNCHER B. DNG ZONE -2 IS A RECTANGULAR AREA BOUNDED BY: 1330N 08030E 1350N 08035E 1335N 08130E 1315N 08125E C. DNG ZONE -3 IS A RECTANGULAR AREA BOUNDED BY: 1300N 08210E 1330N 08215E 1255N 08405E 1225N 08400E D. DNG ZONE -4 IS A RECTANGULAR AREA BOUNDED BY: 1220N 08405E 1300N 08415E 1245N 08510E 1205N 08500E E. DNG ZONE -5 IS A RECTANGULAR AREA BOUNDED BY: 1110N 08825E 1145N 08835E 1125N 08940E 1050N 08930E F. DNG ZONE -6 IS A RECTANGULAR AREA BOUNDED BY: 0905N 09450E 0955N 09505E 0935N 09600E 0845N 09545E G. DNG ZONE -7 IS A RECTANGULAR AREA BOUNDED BY: 1900S 13400W 1700S 13400W 1300S 11200W 0730S 09000W 0930S 09000W 1500S 11200W ROUTES AFFECTED IN CHENNAI FIR ARE: N571, N877, P761, P762, W20, A465, P628, Q10, Q11, Q23, Q24, V3, V4, V9 AND V11 CLOSURE/ALTN ROUTINGS: //PART 1 OF 2 PARTS//. BTN 1200-1600, 31 AUG 12:00 2017 UNTIL 18 SEP 16:00 2017. CREATED: 22 AUG 08:46 2017
« Last Edit: 08/27/2017 09:55 AM by input~2 »

Offline worldtimedate

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Re: IRNSS-1H, PSLV C39, FLP, August 31, 2017 (13:29 UTC)
« Reply #18 on: 08/28/2017 07:40 AM »
Improved version of clocks in IRNSS-1H

Quote
Nellore: In view of the problems that plagued the atomic clocks "highly accurate clocks that measure time in terms of vibrations in certain atoms" in one of the seven satellites of Indian Regional Navigation Satellite System, Indian Space Research Organisation's Satellite Application Centre is working towards ensuring that the other six satellites are not similarly affected.

Quote
The firm which supplied the clocks has updated the three atomic clocks in IRNSS-1H, which is scheduled to be launched on August 31 aboard a PSLV rocket. This satellite will replace IRNSS-1A whose atomic clocks have stopped working. According to sources, the firm had studied anomalies in the clocks along with the Isro team and found some problem with electronics. An improved version of the clock has been developed eliminating the hitch, which will be launched with the IRNSS-1H.

Quote
He said a team of scientists in Satellite Application Centre had conducted several ground tests before installing the modified clocks. Isro engineers will be moving the PSLV-C39 with the IRNSS-1H on board to the Second Launch Pad from the Vehicle Assembly Building on Sunday. The mission will be launched after a series of tests at 6.59 pm on August 31, 2017 from Satish Dhwan Space Centre, SHAR, Sriharikota.

Quote
Isro has readied two more satellites as per original plan and one among them, IRNSS-1H, is being launched now". Asked about the snags with the atomic clocks, he said that every country had issues with navigational satellite systems at one time or the other.

He said only one among the three atomic clocks would be put to use at any point of time henceforth in all the NaVIC satellites. According to the senior scientist, firms supplying critical equipment keep track of their functioning and update the technology for future missions. He added that the companies also provide replacement whenever necessary. He expressed confidence in the satisfactory functioning of the improved version of rubidium atomic clocks.

worldtimedate [ http://www.world-timedate.com/ ]

Offline vineethgk

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Re: IRNSS-1H, PSLV C39, FLP, August 31, 2017 (13:29 UTC)
« Reply #19 on: 08/28/2017 02:06 PM »
Mission brochure is up!

Link

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