LIVE: PSLV C23 - SPOT 7 - June 30, 2014 (0422 UTC)

[input~2]

PSLV has finally been selected to launch SPOT 7
(source)

[input~2]

Planned launch date: 2014-Q1

[Steven Pietrobon]

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?

[input~2]

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

[Steven Pietrobon]

Thanks input-2, but that document was created on 20 September 2012, so might be out of date.

[input~2]

Thanks input-2, but that document was created on 20 September 2012, so might be out of date.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

[input~2]

On July 1, ISRO management said they will try to launch SPOT-7 in December 2013

[K210]

CanX-4, CanX-5 and AISSat will be orbited along with SPOT-7. Source: http://spaceref.com/calendar/calendar.html?pid=8203

[beidou]

Information on CanX-4 & CanX-5 Mission: https://www.utias-sfl.net/nanosatellites/CanX45/

[Steven Pietrobon]

I believe that should be AISat, not to be confused with AISSat 2, which is flying on Soyuz.

[input~2]

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

[input~2]

..SPOT 7 set to be launched in the first quarter of 2014

http://www.gim-international.com/news/remote_sensing/satellite_imagery/id7663-astrium_grants_a_look_behind_the_scenes_of_spot_7.html

[isro-watch]

From which country is AISSAT ?

[input~2]

From which country is AISSAT ?

It is spelt AISat
from Germany
http://www.dlr.de/irs/en/desktopdefault.aspx/tabid-6970/11520_read-26880/

[input~2]

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

[Galactic Penguin SST]

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.

[AJA]

http://www.newindianexpress.com/states/kerala/Busy-Launch-Time-Ahead-for-the-ISRO/2014/05/14/article2223533.ece

Didn't know this..

The C-23 is a ‘PSLV-CA (Core Alone)’ model meaning that the rocket will not be sporting strap-on motors.

[Skyrocket]

http://www.newindianexpress.com/states/kerala/Busy-Launch-Time-Ahead-for-the-ISRO/2014/05/14/article2223533.ece

Didn't know this..

The C-23 is a ‘PSLV-CA (Core Alone)’ model meaning that the rocket will not be sporting strap-on motors.

see here for the different flavours of the PSLV vehicle: http://space.skyrocket.de/doc_lau/pslv.htm

[Stan Black]

http://www.newindianexpress.com/states/kerala/Busy-Launch-Time-Ahead-for-the-ISRO/2014/05/14/article2223533.ece

Didn't know this..

The C-23 is a ‘PSLV-CA (Core Alone)’ model meaning that the rocket will not be sporting strap-on motors.

see here for the different flavours of the PSLV vehicle: http://space.skyrocket.de/doc_lau/pslv.htm

One question, do they vary the length of the fourth stage for the different loadings of propellant in PS4 stage: 0·8 (C18), 1·6 (C8, C9 & C12) and 2·5 (C14, C15, C20, C21)?

Also HPS3 from PSLV-C4?
http://www.bharat-rakshak.com/MONITOR/ISSUE5-3/arun.html

[AJA]

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 ?

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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.