Author Topic: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012  (Read 38997 times)

Offline input~2

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LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« on: 11/06/2011 07:23 AM »
According to the ISRO chairman, launch of PSLV C19 with Risat-1 is now planned for January 2012.
(source: various articles in Telugu)
« Last Edit: 04/26/2012 12:27 AM by Chris Bergin »

Offline antivista

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Re: PSLV C19 - RISAT-1 - January 2012
« Reply #1 on: 11/22/2011 01:59 PM »
You are right, Isro.Us also confirmed this a long time back: https://isro.us/

But the C-19 launch status page is not available at. It shows not found error message here: https://isro.us/countdown/pslv-c19/

I saw launch progress for C18 here before: https://isro.us/countdown/pslv-c18/

Offline input~2

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Offline input~2

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Re: PSLV C19 - RISAT-1 - March 2012
« Reply #3 on: 12/18/2011 07:52 PM »

Offline antivista

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Re: PSLV C19 - RISAT-1 - March 2012
« Reply #4 on: 12/21/2011 02:30 AM »
This is due to unavailability of 2nd launch pad, since GSLV flight test preparations are under progress.
« Last Edit: 12/21/2011 02:35 AM by antivista »

Offline input~2

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Re: PSLV C19 - RISAT-1 - March 2012
« Reply #5 on: 12/21/2011 05:27 AM »
This is due to unavailability of 2nd launch pad, since GSLV flight test preparations are under progress.
What about 1st launch pad?

Offline antivista

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Re: PSLV C19 - RISAT-1 - March 2012
« Reply #6 on: 12/24/2011 02:40 AM »
This is due to unavailability of 2nd launch pad, since GSLV flight test preparations are under progress.
What about 1st launch pad?

RISAT-1 is a remote sensing satellite stated for launch by PSLV-XL which requires Second Launch Pad (SLP). Also next launch of PSLV (Astrosat satellite) is going to launch using PSLV-XL.

ISRO need minimum of 3 months to prepare and launch two PSLV series rockets in SLP. As far as I know, the launch sequence would be:

RISAT-1 --> GSAT-6 (F05) --> Astrosat

Offline input~2

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Re: PSLV C19 - RISAT-1 - March 2012
« Reply #7 on: 12/31/2011 09:55 AM »
March launch date confirmed in a recent article in Telugu
(source)

Offline input~2

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Re: PSLV C19 - RISAT-1 - March 26-31 2012
« Reply #8 on: 02/22/2012 08:17 AM »
Launch now planned for the last week of March
(source)

Offline input~2

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Re: PSLV C19 - RISAT-1 - NET April 2012
« Reply #9 on: 03/05/2012 07:39 PM »
C19 likely to be delayed (beyond March)
(source)

Offline input~2

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Re: PSLV C19 - RISAT-1 - NET April 15 2012
« Reply #10 on: 03/12/2012 06:49 AM »
AFAIU launch planned for April 15
(source in Telugu)                     
« Last Edit: 03/13/2012 08:30 AM by input~2 »

Offline input~2

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Offline input~2

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Offline input~2

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Re: PSLV C19 - RISAT-1 - NET April 15 2012
« Reply #13 on: 03/15/2012 08:30 PM »
Here they say "end of April"

Offline input~2

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Offline input~2

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Re: PSLV C19 - RISAT-1 - NET April 15 2012
« Reply #15 on: 03/27/2012 12:48 PM »
Tentative launch date: April 21
(source in Telugu)

Offline input~2

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Re: PSLV C19 - RISAT-1 - April 21, 2012
« Reply #16 on: 03/28/2012 09:56 PM »
The dates in this NOTAM seem a bit outdated now
Quote
A0045/12 -  DUE TO LAUNCHING OF POLAR SATELLITE VEHICLE (PSLV C-19) FROM INDIA (19 43.9N 080 14.2E) AND THE POSSIBILITY OF IMPACT [....] TEMPO DNG ZONE EST WI AN AREA BOUNDED BY FLW COORD: 3235S 07230E, 3235S 07630E, 3435S 07630E AND 3435S 07230E. SL - UNL, DLY BTN 0515 TO 0730, 21 MAR 05:15 2012 UNTIL 20 APR 07:30 2012. CREATED: 20 MAR 05:41 201

Offline input~2

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Re: PSLV C19 - RISAT-1 - April 21, 2012
« Reply #17 on: 03/29/2012 04:28 PM »
A new NOTAM with revised dates:
Quote
A0061/12 -  DUE TO LAUNCHING OF POLAR SATELLITE VEHICLE (PSLV C-19) FROM INDIA (19 43.9N 080 14.2E) AND THE POSSIBILITY OF IMPACT [....]TEMPO DNG ZONE EST WI AN AREA BOUNDED BY FLW COORD: 333000S 0723000E, 333000S 0763000E, 373000S 0763000E, AND 373000E 0723000E. SL - UNL, DLY BTN 2345 TO 0200, 19 APR 23:45 2012 UNTIL 19 MAY 02:00 2012. CREATED: 29 MAR 11:52 2012
« Last Edit: 03/29/2012 04:41 PM by input~2 »

Offline Salo

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Offline Satori

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Offline input~2

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Re: PSLV C19 - RISAT-1 - April 26, 2012
« Reply #20 on: 04/04/2012 01:09 PM »
" most likely to be launched on April 26 at 5.45 am"
ie April 26, 0015UTC
(source: ISRO chairman quoted in http://www.dnaindia.com/india/report_india-ready-with-all-weather-imaging-satellite-isro_1671521 )

Launch mass of about 1850 kg, to be launched into a 536-km orbit by PSLV

Offline seshagirib

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #21 on: 04/08/2012 04:30 AM »
Is it possible to increase the payload capacity by ground liting all the strapon boosters?
What is the advantage of ground liting some and air liting the rest of the strapons?

Offline Salo

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #22 on: 04/09/2012 10:35 AM »
ISRO officials said that the PSLV carrying remote sensing satellite Risat-1 is slated for launch from April 25-30.
http://timesofindia.indiatimes.com/india/New-ISRO-centre-to-control-spy-satellite-launch/articleshow/12595040.cms

Offline input~2

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Re: PSLV C19 (XL) - RISAT-1 - April 28, 2012
« Reply #23 on: 04/16/2012 08:20 AM »
Launch now planned for April 28 at 0015UTC
(source)

(another source in Telugu)
« Last Edit: 04/17/2012 11:08 AM by input~2 »

Offline input~2

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Re: PSLV C19 (XL) - RISAT-1 - April 28, 2012
« Reply #24 on: 04/19/2012 07:22 PM »
A doglegged trajectory to avoid overflying Sri Lanka is planned as per NOTAM
Quote
A0734/12  - PSLV-C19 ROCKET LAUNCH FM SHAR RANGE,
SRIHARIKOTA WILL TAKE PLACE AS PER FLW DETAILS:
LAUNCH PAD COORD: 1343.9N08014.2E
NO FLT IS PERMITTED OVER THE DNG ZONE
A.DANGER ZONE: 1 IS A CIRCLE OF 10NM AROUND THE LAUNCHER
B.DANGER ZONE: 2 IS A SECT BTN RADII OF 35NM AND 75NM FM
   THE LAUNCHER AND BTN AZIMUTH ANGLES OF 130 AND 150 DEG
   FM TRUE NORTH
C.DANGER ZONE: 3 IS A SECT BTN RADII OF 155NM AND 195NM FM
   THE LAUNCHER AND BTN AZIMUTH ANGLES OF 130 AND 150 DEG
    FM TRUE NORTH
D.DANGER ZONE: 4 IS A RECTANGULAR AREA BOUNDED BY
    1030N08220E 1055N08250E 0935N08350E 0910N08320E
E.DANGER ZONE: 5 IS A RECTANGULAR AREA BOUNDED BY
   0845N08300E 0845N08400E 0745N08400E 0745N08300E
F.DANGER ZONE: 6 IS A RECTANGULAR AREA BOUNDED BY
   0300S08045E 0300S08215E 0700S08215E 0700S08045E
G.DANGER ZONE: 7 IS A RECTANGULAR AREA BOUNDED BY
3330S07230E 3330S07630E 3730S07630E 3730S07230E
[...]
ACTUAL DATE OF LAUNCH WILL BE INTIMATED 24HRS IN ADVANCE THROUGH NOTAM. GND - UNL, 2345-0200 DLY, 25 APR 23:45 2012 UNTIL 19 MAY 02:00 2012. CREATED: 17 APR 06:59 2012
« Last Edit: 04/19/2012 07:36 PM by input~2 »

Offline input~2

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Re: PSLV C19 (XL) - RISAT-1 - April 28, 2012
« Reply #25 on: 04/20/2012 12:14 PM »
Navigational warning

Quote
DTG     191001 Z                                                                         ROUTINE
FROM     NAVAREA VIII CO-ORDINATOR                                    UNCLAS
TO     NAVAREA VIII – 218
---------------------------------------------------------------------------------------------------------------------------------
    INDIAN OCEAN – BAY OF BENGAL (.) CHARTS 32 33 INT 71 INT 73 INT 706 INT 707 (.)
PSLV- C19 ROCKET LAUNCHING SCHEDULED FROM LAUNCH PAD 13-43.9N 080-14.2E
BETWEEN 2345 UTC TO 0200 UTC FROM 25 APR TO 28 APR 2012
2. DANGER AREAS ARE AS FOLLOWS
    (A) DANGER ZONE–1 (.) CIRCLE OF 10 NM AROUND THE LAUNCHER
    (B) DANGER ZONE–2 (.) SECTOR BETWEEN RADII OF 35 NM AND 75 NM FROM
LAUNCHER AND BETWEEN AZIMUTH ANGLES 130 DEGREE AND 150 DEGREE FROM TRUE
NORTH
    (C) DANGER ZONE -3 (.) SECTOR BETWEEN RADII OF 155 NM AND 195 NM FROM
LAUNCHER AND BETWEEN AZIMUTH ANGLES 130 DEGREE AND 150 DEGREE FROM TRUE
NORTH
    (D) DANGER ZONE – 4 (.) AREA BOUNDED BY FOLLOWING POINTS
         (I) 10-30N     082-20E         (II) 10-55N     082-50E
         (III) 09-35N     083-50E         (IV) 09-10N     083-20E
    (E) DANGER ZONE – 5 (.) AREA BOUNDED BY FOLLOWING POINTS
         (I) 08-45N     083-00E         (II) 08-45N     084-00E
         (III) 07-45N     084-00E        (IV) 07-45N     083-00E
    (F) DANGER ZONE – 6 (.) AREA BOUNDED BY FOLLOWING POINTS
         (I) 03-00S     080-45E         (II) 03-00S     082-15E
         (III) 07-00S     082-15E         (IV) 07-00S     080-45E
    (G) DANGER ZONE – 7 (.) AREA BOUNDED BY FOLLOWING POINTS
         (I) 33-30S     072-30E         (II) 33-30S     076-30E
         (III) 37-30S     076-30E         (IV) 37-30S     072-30E
3.     CAUTION ADVISED
4.     CANCEL THIS MSG 280300 UTC APR 12
                                                                                                     191001 Z / APR

Offline input~2

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Re: PSLV C19 (XL) - RISAT-1 - April 28, 2012
« Reply #26 on: 04/21/2012 06:54 AM »
RISAT-1 under tests (pictures from ISRO annual report 2011-2012)

Offline seshagirib

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Re: PSLV C19 (XL) - RISAT-1 - April 28, 2012
« Reply #27 on: 04/21/2012 09:40 AM »
news report:

 http://dailypioneer.com/nation/59047-isro-flying-high-all-set-for-mars-mission.html

is giving launch time as early hours of 26 April 2012

Offline input~2

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Re: PSLV C19 (XL) - RISAT-1 - April 28, 2012
« Reply #28 on: 04/21/2012 02:29 PM »
news report:

 http://dailypioneer.com/nation/59047-isro-flying-high-all-set-for-mars-mission.html

is giving launch time as early hours of 26 April 2012

The Deccan Chronicle also
Sriharikota readying for PSLV launch on Thursday

So let's put it up as the new launch date and let's see if it won't be put off! ;)
« Last Edit: 04/21/2012 06:41 PM by input~2 »

Offline m.prasad

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #29 on: 04/23/2012 12:00 PM »
C19 count down is started today. Refer ISRO link:
http://isro.org/pressrelease/scripts/pressreleasein.aspx?Apr23_2012

ISRO even released the brochures & photoes...

Cheers
~Prasad
« Last Edit: 04/23/2012 12:02 PM by m.prasad »

Offline input~2

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #30 on: 04/23/2012 06:27 PM »
C19 count down is started today. Refer ISRO link:
http://isro.org/pressrelease/scripts/pressreleasein.aspx?Apr23_2012

ISRO even released the brochures & photoes...

Cheers
~Prasad
Thanks Prasad; so launch is planned for April 26 at 0017UTC                      

Offline Lewis007

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #31 on: 04/24/2012 06:59 AM »
C19 count down is started today. Refer ISRO link:
http://isro.org/pressrelease/scripts/pressreleasein.aspx?Apr23_2012

ISRO even released the brochures & photoes...

Cheers
~Prasad


Launch brochure is attached

Offline Satori

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #32 on: 04/25/2012 08:11 PM »
Any information of a possible live transmission by the Indian TV's?

Offline input~2

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #33 on: 04/25/2012 08:43 PM »
Any information of a possible live transmission by the Indian TV's?
I would try http://webcast.gov.in/live/

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #34 on: 04/25/2012 08:51 PM »
Any information of a possible live transmission by the Indian TV's?
I would try http://webcast.gov.in/live/

Thanks!

Offline tehwkd

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #35 on: 04/25/2012 08:53 PM »
Any information of a possible live transmission by the Indian TV's?


few h ago i saw http://webcast.gov.in/live/ talking about c19.

other possible sources are http://live.indiatimes.com/ http://www.ndtv.com/video/live/channel/ndtv24x7  http://ibnlive.in.com/livetv/




Top 10 facts about RISAT-1, India's own 'spy satellite'
http://www.ndtv.com/article/india/top-10-facts-about-risat-1-indias-own-spy-satellite-202250
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Offline TRNS

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #36 on: 04/25/2012 11:20 PM »
Nothing on Indian TV about launch... kinda disappointing

Offline Chris Bergin

Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #37 on: 04/25/2012 11:23 PM »
Still got another hour, but yeah, not looking all that hopeful of coverage.

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #38 on: 04/25/2012 11:30 PM »
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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #39 on: 04/25/2012 11:32 PM »
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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #40 on: 04/25/2012 11:33 PM »
Countdown proceeding without problems...

Offline tehwkd

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #41 on: 04/25/2012 11:36 PM »
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Offline Chris Bergin

Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #42 on: 04/25/2012 11:39 PM »
Woo, awesome. Remember folks, two images per post if possible (otherwise the page takes too long to load, but always appreciated!)

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #43 on: 04/25/2012 11:48 PM »
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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #45 on: 04/25/2012 11:59 PM »
webcast.in.gov is talking about Cricket :)

cricket beats NDTV's 10min rollercoaster of promos and commercials
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Offline tehwkd

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #46 on: 04/26/2012 12:00 AM »
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Offline tehwkd

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #47 on: 04/26/2012 12:02 AM »
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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #48 on: 04/26/2012 12:02 AM »
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Offline tehwkd

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #49 on: 04/26/2012 12:04 AM »
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Offline tehwkd

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #50 on: 04/26/2012 12:04 AM »
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Offline tehwkd

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #51 on: 04/26/2012 12:05 AM »
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Offline Chris Bergin

Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #52 on: 04/26/2012 12:05 AM »
Now English commentary, but appears to be part of the news updates.

Offline William Graham

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #53 on: 04/26/2012 12:07 AM »
"Heaviest satellite ever to be launched" - that's been taken completely out of context, it's the heaviest satellite to be launched by a PSLV, but it is nowhere near being the heaviest satellite ever launched.
« Last Edit: 04/26/2012 12:09 AM by William Graham »

Offline Satori

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #54 on: 04/26/2012 12:07 AM »
jpg images, please?


Offline Satori

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #56 on: 04/26/2012 12:10 AM »


Offline Mapperuo

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #58 on: 04/26/2012 12:12 AM »
Think that was my door.. Oh no sorry. It's the TV.  ;D ;D
« Last Edit: 04/26/2012 12:15 AM by Mapperuo »
- Aaron

Offline Satori

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #59 on: 04/26/2012 12:13 AM »



Offline Satori

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Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #62 on: 04/26/2012 12:16 AM »










Offline Chris Bergin

Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #72 on: 04/26/2012 12:25 AM »
Nominal flight so far.


Offline Chris Bergin

Re: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #74 on: 04/26/2012 12:27 AM »
Nominal fourth stage performance.



Offline Chris Bergin

Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #77 on: 04/26/2012 12:34 AM »
Orbital velocity. Fourth stage cut off.

Offline Chris Bergin

Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #78 on: 04/26/2012 12:35 AM »
S/C Sep. All nominal. Congrats!


Offline Chris Bergin

Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #80 on: 04/26/2012 12:37 AM »
Mr Chairman very happy. Notes complete success.

Offline Chris Bergin

Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #81 on: 04/26/2012 12:40 AM »
This man is great! Very nice speech, noting about the stupidity of global events when they can have great events like this launch.

Offline klausd

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« Last Edit: 04/26/2012 05:25 AM by input~2 »

Offline Shturmanskie

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Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #83 on: 04/26/2012 01:35 AM »
Well Done, India!! Congratulations on lifting a very heavy satellite into orbit.

Offline input~2

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Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
« Reply #84 on: 04/26/2012 05:16 AM »
USSTRATCOM has catalogued 2 objects
  • Object A 38248/2012-017A from 1st elset in 460.6km x 530.4km x 97.53° (presumably the S/C)
  • Object B 38249/2012-017B from 1st elset in 461.3km x 479.0km x 97.63° (presumably PSLV 4th stage)

  • Offline input~2

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    Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
    « Reply #85 on: 04/26/2012 05:33 AM »
    Launch photos from ISRO

    Offline input~2

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    Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
    « Reply #86 on: 04/26/2012 06:07 AM »
    USSTRATCOM has catalogued 2 objects
  • Object A 38248/2012-017A from 1st elset in 460.6km x 530.4km x 97.53° (presumably the S/C)
  • Object B 38249/2012-017B from 1st elset in 461.3km x 479.0km x 97.63° (presumably PSLV 4th stage)
  • According to the launch video, the achieved S/C orbit after separation was 476km x 482km x 97.6°.
    The S/C was then supposed to raise its altitude to 536km using its own propulsion subsystem

    Offline Nahavandi

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    Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
    « Reply #87 on: 04/26/2012 09:59 AM »
    Some interesting amateur footage:



    Offline input~2

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    Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
    « Reply #88 on: 04/27/2012 07:02 AM »
    Those TV broadcast banners that take up the bottom third of the screen really don't work with tall skinny rockets, do they?  Perhaps they could compromise, filling the sides of the screen, rather than the bottom, when they're covering a rocket launch!

     - Ed Kyle
    A better view of the lower screen with flight data in this 37 minutes video

    Offline input~2

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    Offline input~2

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    Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
    « Reply #90 on: 04/27/2012 08:23 PM »
    USSTRATCOM has catalogued 2 objects
  • Object A 38248/2012-017A from 1st elset in 460.6km x 530.4km x 97.53° (presumably the S/C)
  • Object B 38249/2012-017B from 1st elset in 461.3km x 479.0km x 97.63° (presumably PSLV 4th stage)
  • Well, it appears now that Object A was PSLV 4th stage and Object B the S/C.
    The Objects have just recently been switched: old Object B (the S/C) becomes new Object A and its orbit has been raised earlier to-day from 465 x 481 km to 490 x 511 km, while new Object B (old Object A) remains in 467 x 530 km
    « Last Edit: 04/27/2012 08:25 PM by input~2 »

    Offline seshagirib

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    Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
    « Reply #91 on: 04/28/2012 08:05 AM »
    ^ How can the booster be in a initial higher orbit than the s/c? where the booster engines fired again after releasing the s/c ?  Is it not better to deorbit the booster?

    Offline input~2

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    Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
    « Reply #92 on: 04/28/2012 12:58 PM »
    ^ How can the booster be in a initial higher orbit than the s/c? where the booster engines fired again after releasing the s/c ?
    Good question! ;) .The higher apogee of the booster stage could be due to a collision avoidance maneuver (CAM), but I would have expected, as is the case with other launchers,  the resulting apogee of the released spacecraft to be higher than that of the booster stage..
    If anyone could describe the PSLV 4th stage CAM, it would be helpful! (the 2005 PSLV user's manual doesn't give any details on this maneuver)
    « Last Edit: 04/28/2012 01:09 PM by input~2 »

    Offline input~2

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    Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
    « Reply #93 on: 04/28/2012 01:15 PM »
    Raising the S/C orbit continues:
    Earlier to-day the achieved orbit was 508 x 530 km (inclined 97.60°)

    Offline input~2

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    Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
    « Reply #94 on: 04/28/2012 09:01 PM »
    http://www.isro.org/pressrelease/scripts/pressreleasein.aspx?Apr28_2012
    Quote
    April 28, 2012
    Radar Imaging Satellite (RISAT-1) successfully placed in its final orbit
                 The Radar Imaging Satellite (RISAT-1), launched by PSLV-C19 on April  26, 2012, has now been placed in its final Polar Sun-synchronous Orbit  of 536 km height.

    It may be recalled that PSLV-C19 had placed RISAT-1 in a polar  orbit of 470 km X 480 km. As planned, on April 27-28, 2012, the  satellite propulsion system was used in four orbital maneuvers to raise  height of the orbit of RISAT-1 to 536 km. The satellite is now in its  final orbital configuration and in good health. In the coming days,  various elements of the C-band Synthetic Aperture Radar will be tested  and calibrated as a prelude to payload operations.

    As compared to the optical remote sensing satellites that depend  upon sunlight, the Synthetic Aperture Radar of RISAT-1 transmits its  own radar pulses (at 5.35 GHz) to study the objects on Earth. This  facilitates 
  • cloud penetration and
  • imaging even without sunlight.
  • For RISAT-1, imaging sessions around both 6 AM and 6 PM have been chosen.

    Offline sanman

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    Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
    « Reply #95 on: 04/29/2012 12:10 AM »
    Here's the liftoff from a more distant group of observers:




    Offline isro-watch

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    Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
    « Reply #96 on: 05/01/2012 04:28 PM »
    Why is that PSLV-C19 launched RISAT-1 into a 480KM orbit ?
    Was the rocket not capable of launching it a few kilometers higher. The final orbit was only 526 KM ?

    Mod: Post moved from "Indian launch schedule"
    « Last Edit: 05/01/2012 06:21 PM by input~2 »

    Offline Satori

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    Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
    « Reply #97 on: 05/02/2012 08:38 PM »
    Does anyone has the times of the different events on the RISAT-1 launch?

    Offline input~2

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    Offline m.prasad

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    Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
    « Reply #99 on: 05/13/2012 03:38 PM »
    ISRO has released the  RISAT-1 images! :-)

    (Ref: http://isro.org/pslv-c19/Imagegallery/satelliteimages.aspx#9 )

    ~Prasad

    Offline vineethgk

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    Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
    « Reply #100 on: 02/01/2017 07:18 PM »
    Bumping an old thread as I thought the update would best be posted here to give the context..

    @Mods, please let me know if a separate thread needs to be created for this.

    Indian RISAT-1 Spacecraft Fragments in
    Late September


    Quote
    The Indian Radar Imaging Satellite (RISAT)-1
    Earth observation satellite experienced a fragmentation
    event on 30 September 2016 between 2:00 and
    6:00 GMT due to an unknown cause. The spacecraft
    (International Designator 2012-017A, U.S. Strategic
    Command [USSTRATCOM] Space Surveillance
    Network [SSN] catalog number 38248), operated
    by the Indian Space Research Organization (ISRO),
    carries a C-band microwave synthetic aperture radar.
    The spacecraft had been on-orbit 4.4 years and was in a 97.6° inclination, 543 by 539 km orbit at the time of
    the event.
    Over 12 fragments were observed initially by
    the SSN. However, as of 8 November, only one piece
    (SSN 41797) had entered the catalog, having decayed
    from orbit on 12 October 2016; the remainder have
    decayed as well. At the current time, this event is
    categorized as an anomalous separation of multiple high
    area-to-mass ratio debris. Events like this are sometimes
    referred to as a shedding event.

    Source: The latest NASA Orbital debris quarterly report (attached)

    Thanks to @Ohsin at Reddit forum for this.
    « Last Edit: 02/01/2017 07:22 PM by vineethgk »

    Offline vyoma

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    Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
    « Reply #101 on: 02/01/2017 08:58 PM »
    So.... RIP RISAT-1?

    Online russianhalo117

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    Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
    « Reply #102 on: 02/02/2017 03:12 AM »
    So.... RIP RISAT-1?
    Not yet because it LOM has not been declared. Again it is shedding event and no indication yet that critical hardware detached. I'd wait a couple of weeks until impacts of operations are made known

    Offline input~2

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    Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
    « Reply #103 on: 02/02/2017 07:36 AM »
    Well, the spacecraft (2012-017A/38248) is today in the same orbit as in August 2016, i.e. before the shedding event

    Offline vineethgk

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    Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
    « Reply #104 on: 03/28/2017 02:05 PM »
    Risat-1 satellite is functioning normally, says Isro
    Quote
    The US space agency Nasa has reported that India’s earth observation satellite Risat-1 had experienced a “fragmentation event” in September last year, when pieces appeared to have broken off. The report, in Nasa’s quarterly magazine Orbital Debris, said the cause was not known. An Isro official said there was some anomaly which had been rectified, and the satellite was functioning normally.
    Quote
    It had been in space for 4.4 years when the incident reported by Nasa occurred. The magazine said Risat-1 experienced the fragmentation event between 0200 and 0600 GMT (7.30 am and 11.30 am IST). Over 12 fragments were observed by the Space Surveillance Network of the US, it said. By November 8, only one piece, designated SSN 41797, had entered the catalog, having decayed — from orbit on October 12, 2016. The other pieces had decayed — moved away from the satellite — as well. Eventually, space debris in the near earth orbit tends to enter the earth’s atmosphere and burn up.

    The magazine said the event was categorised as an “anomalous separation of multiple high area-to-mass ratio debris”. Events like this are sometimes referred to as a shedding event. Nasa’s Space Debris Programme continuously tracks 17,000 space objects and maintains record of all space debris — non-functional objects in space — as well as operational satellites.

    When contacted for clarification, Isro spokesperson Deviprasad Karnik said the satellite was functioning normally. He said Isro scientists had corrected some anomaly which had nothing to do with what was reported in the Nasa magazine.

    Offline seshagirib

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    Re: LIVE: PSLV C19 (XL) - RISAT-1 - April 26, 2012
    « Reply #105 on: 03/30/2017 09:01 AM »
    So.... RIP RISAT-1?
    Not yet because it LOM has not been declared. Again it is shedding event and no indication yet that critical hardware detached. I'd wait a couple of weeks until impacts of operations are made known

    It could be just some paint or insulating film peeling off.(?)

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