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LIVE: PSLV C23 - SPOT 7 - June 30, 2014 (0422 UTC)
by
input~2
on 06 Jun, 2013 09:34
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PSLV has finally been selected to launch SPOT 7
(
source)
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#1
by
input~2
on 09 Jun, 2013 09:02
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Planned launch date: 2014-Q1
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#2
by
Steven Pietrobon
on 10 Jun, 2013 07:43
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That input-2. The article says
A date for SPOT-7 will be discussed when signing the agreement. “One can expect the launch from December onwards,” Dr. Radhakrishnan said.
so shouldn't you have Dec. 2013 as the launch date?
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#3
by
input~2
on 10 Jun, 2013 08:39
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That input-2. The article says
A date for SPOT-7 will be discussed when signing the agreement. “One can expect the launch from December onwards,” Dr. Radhakrishnan said.
so shouldn't you have Dec. 2013 as the launch date?
Well the
operator says 2014-Q1
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#4
by
Steven Pietrobon
on 12 Jun, 2013 06:00
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Thanks input-2, but that document was created on 20 September 2012, so might be out of date.
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#5
by
input~2
on 12 Jun, 2013 19:46
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Thanks input-2, but that document was created on 20 September 2012, so might be out of date.
Another document from the same source dated end April 2013 shows the same launch date of 2014-Q1
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#6
by
input~2
on 01 Jul, 2013 19:10
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On July 1, ISRO management said they will try to launch SPOT-7 in December 2013
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#7
by
K210
on 26 Sep, 2013 11:06
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#8
by
beidou
on 26 Sep, 2013 20:19
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#9
by
Steven Pietrobon
on 27 Sep, 2013 06:45
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I believe that should be
AISat, not to be confused with
AISSat 2, which is flying on Soyuz.
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#10
by
input~2
on 06 Oct, 2013 16:10
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Seems that the launch will occur in February:
Tender Type: Public Tender Currency: INR
Description: COMMUNICATION LINKS FOR PSLV-C-23/SPOT-7
Schedule
Seq No Buyer Stage Start Date & Time Expiry Date & Time
8 PO Release 31-10-2013 10:00 31-01-2014 17:00
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#11
by
input~2
on 19 Oct, 2013 15:25
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#12
by
isro-watch
on 07 Nov, 2013 04:35
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From which country is AISSAT ?
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#13
by
input~2
on 07 Nov, 2013 05:03
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#14
by
input~2
on 14 Nov, 2013 15:13
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Seems that the launch will occur in February:
Tender Type: Public Tender Currency: INR
Description: COMMUNICATION LINKS FOR PSLV-C-23/SPOT-7
Schedule
Seq No Buyer Stage Start Date & Time Expiry Date & Time
8 PO Release 31-10-2013 10:00 31-01-2014 17:00
Seems that the schedule for this procurement has been delayed:
Tender No: ISTRAC/PURC/2013E0028601 Tender Ref. Date: 12-09-2013
Tender Type: Public Tender Currency: INR
Description: COMMUNICATION LINKS FOR PSLV-C-23/SPOT-7
Schedule
Seq No Buyer Stage Supplier Stage Start Date & Time Expiry Date & Time
1 Tender Release - 12-09-2013 10:00 25-09-2013 17:00
2 - Tender download 26-09-2013 10:01 07-11-2013 17:00
3 - Bid Submission 26-09-2013 10:01 07-11-2013 17:00
4 Bid Sealing - 07-11-2013 18:00 11-11-2013 17:00
5 - Open Authorisation 12-11-2013 10:00 15-11-2013 17:00
6 Tender Opening - 15-11-2013 18:00 31-03-2014 17:00
7 Tender Evaluation - 15-11-2013 18:00 31-03-2014 17:00
8 PO Release - 15-11-2013 18:00 31-03-2014 17:00
This could mean a delay for PSLV-C23 now NET April 2014
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#15
by
Galactic Penguin SST
on 05 Apr, 2014 05:50
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Looks like the launch is now in June.ISRO, which successfully launched a GSLV with indigeonous cryogenic engine would conduct an experimental launch of GSLV Mark III in June this year, said Radhakrishnan. Another PSLV carrying a French satellite SPOT 7 and four other foreign satellites were also to be launched in the same month, he said.
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#16
by
AJA
on 23 May, 2014 21:07
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#17
by
Skyrocket
on 23 May, 2014 21:40
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#18
by
Stan Black
on 24 May, 2014 07:26
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#19
by
AJA
on 24 May, 2014 07:55
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see here for the different flavours of the PSLV vehicle: http://space.skyrocket.de/doc_lau/pslv.htm
| PSLV-CA-PS1 / S-138 + 2 roll control eng.PS2 (L-40) / VikasPS3 / S-7PS4 (L-2.5) / 2 ? |
[/size][/font]
I thought the RPY controls were all initiated through SITVC, but apparently, they're augmented by those two smaller strap-ons which are liquid motors.
Pitch and yaw control of the PSLV during the thrust phase of the solid motor is achieved by injection of an aqueous solution of strontium perchlorate in the nozzle to constitute Secondary Injection Thrust Vector Control System (SITVC). The injection is stored in two cylindrical aluminum tanks strapped to the solid rocket motor and pressurized with nitrogen. There are two additional small liquid engine control power plants in the first stage, the Roll Control Thrusters (RCT), fixed radially opposite one on each side, between the triplet set of strap-on boosters. RCT is used for roll control during the first stage and the SITVC in two strap-on motors is for roll control augmentation.