Do we know if this launch is still scheduled in Q1 2013?Oh and has the navigation system's ICD (or something like that) ever been released?
ISRO is planning IRNSS-1 in May 2013 as per the latest news! It is supposed to be launched on new PSLV variant HP version (with improved 4th stage along with other improvements) that carries 2000kg payload. Pls refer.I guess, this is still on papers as there is no news about this till now. So, we can assume, ISRO uses XL version for this launch (since payload weight is within XL range).Thx~Prasad
Just asking with enthu...How much is the payload gain if PSLV uses:1. S200 for 1st stage (instead of S139)2. S12 for 3rd stage (instead of S7)I mean, a PSLV with the following config:Stage 1: S200 + 6 S12 Strap onsStage 2: L40HStage 3: S12Stage 4: L2.5Any guess? Would that be around 1600Kg-1700Kg?Thx~Prasad
The two spare IRNSS sats will be launched into the 19140 km circular (i = 64.8 deg.) orbit by the GSLV MK2c (4 stages with PAM-G being the fourth stage, refer meo mission and PAM-G-Hot test)
Quote from: antriksh on 01/22/2013 07:19 pmThe two spare IRNSS sats will be launched into the 19140 km circular (i = 64.8 deg.) orbit by the GSLV MK2c (4 stages with PAM-G being the fourth stage, refer meo mission and PAM-G-Hot test)That was originally planned for two Russian GLONASS Uragan-M?
Quote from: m.prasad on 01/22/2013 09:47 amISRO is planning IRNSS-1 in May 2013 as per the latest news! It is supposed to be launched on new PSLV variant HP version (with improved 4th stage along with other improvements) that carries 2000kg payload. Pls refer.I guess, this is still on papers as there is no news about this till now. So, we can assume, ISRO uses XL version for this launch (since payload weight is within XL range).Thx~PrasadXL version cannot be used for placing IRNSS sat in 240x24000 km (GTO) because its max payload capacity is 1300 kgs for GTO (refer attached PSLVvariants pic) and lift-off wt of the sat is around 1400-1425 kgs (from various isro ppts). HP version on the other hand has the required launch capacity (1440 kgs to GTO). The two spare IRNSS sats will be launched into the 19140 km circular (i = 64.8 deg.) orbit by the GSLV MK2c (4 stages with PAM-G being the fourth stage, refer meo mission and PAM-G-Hot test)
Quote from: antriksh on 01/22/2013 07:19 pmQuote from: m.prasad on 01/22/2013 09:47 amISRO is planning IRNSS-1 in May 2013 as per the latest news! It is supposed to be launched on new PSLV variant HP version (with improved 4th stage along with other improvements) that carries 2000kg payload. Pls refer.I guess, this is still on papers as there is no news about this till now. So, we can assume, ISRO uses XL version for this launch (since payload weight is within XL range).Thx~PrasadXL version cannot be used for placing IRNSS sat in 240x24000 km (GTO) because its max payload capacity is 1300 kgs for GTO (refer attached PSLVvariants pic) and lift-off wt of the sat is around 1400-1425 kgs (from various isro ppts). HP version on the other hand has the required launch capacity (1440 kgs to GTO). The two spare IRNSS sats will be launched into the 19140 km circular (i = 64.8 deg.) orbit by the GSLV MK2c (4 stages with PAM-G being the fourth stage, refer meo mission and PAM-G-Hot test)PSLV-C17 an XL version carried GSAT-12 which was 1450 Kghttp://www.isro.org/pslv-c17/pdf/pslv-c17-brochure.pdf#PSLV-C17
About the sat:Type/Applications: Navigation Orbit Location: 55°E Geo http://www.sac.gov.in/SACSITE/IRNSS-1A.html
Launch has been delayed 2 weeks for technical reason.New launch date is end of June.(source: local press in Telugu)
June 01, 2013 Polar Satellite Launch Vehicle (PSLV-C22) flight delayed by a fortnightIRNSS-1A, the first Indian Navigation Satellite, was scheduled for launch onboard PSLV-C22 on June 12, 2013 at 01:01 hrs. from Satish Dhawan Space Centre, Sriharikota. IRNSS-1A Satellite has gone through all electrical checks and is ready for propellant filling. The PSLV-C22 vehicle was fully integrated and was undergoing electrical checks.During the electrical checks of the launch vehicle, an anomaly was observed in one of the electro-hydraulic control actuators in the second stage. It has been decided to replace this actuator.The replacement of the control actuator needs two weeks of activity at the Launch Pad and the Vehicle Assembly Area. Accordingly, the launch of PSLV-C22/IRNSS-1A is delayed by a fortnight with respect to the original scheduled date of June 12, 2013.
Confirmation of the delay by ISROQuoteJune 01, 2013 Polar Satellite Launch Vehicle (PSLV-C22) flight delayed by a fortnightIRNSS-1A, the first Indian Navigation Satellite, was scheduled for launch onboard PSLV-C22 on June 12, 2013 at 01:01 hrs. from Satish Dhawan Space Centre, Sriharikota. IRNSS-1A Satellite has gone through all electrical checks and is ready for propellant filling. The PSLV-C22 vehicle was fully integrated and was undergoing electrical checks.During the electrical checks of the launch vehicle, an anomaly was observed in one of the electro-hydraulic control actuators in the second stage. It has been decided to replace this actuator.The replacement of the control actuator needs two weeks of activity at the Launch Pad and the Vehicle Assembly Area. Accordingly, the launch of PSLV-C22/IRNSS-1A is delayed by a fortnight with respect to the original scheduled date of June 12, 2013.http://www.isro.org/pressrelease/scripts/pressreleasein.aspx?Jun01_2013
Now we're told "June end or the first week of July" for this launch(source)
Quote from: input~2 on 06/06/2013 12:06 pmNow we're told "June end or the first week of July" for this launch(source)Will this manifest a further delay?
A1218/13 [...] - PSLV-C22 ROCKET LAUNCH FM SHAR RANGE, SRIHARIKOTA WILL TAKEPLACE AS PER FLW DETAILS. THE LAUNCH WILL BE ON ANY ONE OF THE DAYDUR THIS PERIOD. ACTUAL DATE OF LAUNCH WILL BE INTIMATED 24 HRIN ADVANCE THRU A SEPARATE NOTAM. LAUNCH PAD COORD: 1343.9N 08014.2ENO FLT IS PERMITTED OVER THE DNG ZONE.I. DNG ZONE-1 A CIRCLE OF 10NM AROUND THE LAUNCHER II. DNG ZONE-2 A RECTANGULAR AREA BOUNDED BY: 1345N 08045E 1330N 08040E 1320N 08125E 1335N 08130EIII. DNG ZONE-3 A RECTANGULAR AREA BOUNDED BY: 1335N 08210E 1305N 08205E 1240N 08400E 1310N 08405E IV. DNG ZONE-4 A RECTANGULAR AREA BOUNDED BY: 1300N 08425E 1230N 08420E 1220N 08505E 1250N 08510EV. DNG ZONE-5 A RECTANGULAR AREA BOUNDED BY 1205N 08835E 1125N 08825E 1110N 08925E 1150N 08935EVI. DNG ZONE-6 A RECTANGULAR AREA BOUNDED BY 1100N 09430E 0900N 09430E 0900N 09540E 1100N 09540EVII. DNG ZONE-7 A RECTANGULAR AREA BOUNDED BY 1700S 13300W 1900S 13300W 1000S 09200W 0800S 09300WROUTES AFFECTED IN CHENNAI FIR P761 W20 A465 N571 N877 V003 V004 V009 V010AND L518CLOSURE/ALTN RTE:1. P761 NOT AVBL MMV VOR AND PPB VORALTN RTE : MMV VOR-P574-GIRNA-DCT-BIKEN-P762-PPB VOR ?BIDIRECTIONAL?2. W20 NOT AVBL BTN MMV VOR AND BODELALTN ROUTE: MMV VOR-TR319/139DEG- 53NM-TTP VOR-TR357/177 DEG--81NM- BODEL //PART 1 OF 2 PARTS//. 1600-2030 DLY, 01 JUL 16:00 2013 UNTIL 27 JUL 20:302013. CREATED: 17 JUN 14:56 2013
Launch time now said to be 1817UTC, July 1.(source in Telugu)
Quote from: input~2 on 06/26/2013 09:10 amLaunch time now said to be 1817UTC, July 1.(source in Telugu)....and the ISRO status page gives 18:11 UTC....
Flight profile and sequence of events from ISRO brochureFinal orbit inclination should be 29° (as per brochure text - 27° in the sequence of events figure seems to be a misprint -)
PSLV- C22 ROCKET LAUNCHING SCHEDULEDFROM LAUNCH PAD 13-43.9N 080-14.2E BETWEEN 1600 UTC TO 2030 UTC FROM 01 JUL TO 03 JUL 13
Webcast also onhttp://www.isro.org/scripts/livewebcast-c22.aspx
Just a few minutes to launch and they are playing some old promo video !
Is that the Prime Minister? He's enjoying himself, saying he's like a kid with the countdown.
Quote from: Chris Bergin on 07/01/2013 06:36 pmIs that the Prime Minister? He's enjoying himself, saying he's like a kid with the countdown.No, He is a renowned scientist Prof. Yaspal
Quote from: antriksh on 07/01/2013 06:38 pmQuote from: Chris Bergin on 07/01/2013 06:36 pmIs that the Prime Minister? He's enjoying himself, saying he's like a kid with the countdown.No, He is a renowned scientist Prof. YaspalThanks. He's enjoyable to listen to!
Is that the Prime Minister?
Quote from: Chris Bergin on 07/01/2013 06:36 pmIs that the Prime Minister?Talking? Bwahahahahahahaha. Chris, you just added icing on the cake
If any one had noticed, one of the speakers talked of 10 more IRNSS satellites !!!! I thought it was 7...Are they thinking of going Global ?
Quote from: isro-watch on 07/01/2013 06:55 pmIf any one had noticed, one of the speakers talked of 10 more IRNSS satellites !!!! I thought it was 7...Are they thinking of going Global ?AS of now, they have planned 11 sats, 7 + 4 more
Quote from: antriksh on 07/01/2013 06:59 pmQuote from: isro-watch on 07/01/2013 06:55 pmIf any one had noticed, one of the speakers talked of 10 more IRNSS satellites !!!! I thought it was 7...Are they thinking of going Global ?AS of now, they have planned 11 sats, 7 + 4 moreI remember the original plan was 7 (4 GEO + 3 IGSO), what is for the another four?
Quote from: beidou on 07/01/2013 07:02 pmQuote from: antriksh on 07/01/2013 06:59 pmQuote from: isro-watch on 07/01/2013 06:55 pmIf any one had noticed, one of the speakers talked of 10 more IRNSS satellites !!!! I thought it was 7...Are they thinking of going Global ?AS of now, they have planned 11 sats, 7 + 4 moreI remember the original plan was 7 (4 GEO + 3 IGSO), what is for the another four?Backup + Augmentation
GSAT also at SHAR. Targeting possible launch on August 6th.July 25th, Insat 3-D (Meteorological, 6 channel imagers, vertical humidity profiles etc.) from Kourou. Has completed all the tests at Kourou.Targeting GSAT 7 (More communication transponders) dispatch from ISAC to Kourou on August 9, launch in 3rd/4th week of August.Mars orbiter still targeting October 21st.Work going on well on all.7 satellites (didn't get all of them) before they get on to IRNSS 1-B and the rest of the constellation....and that's a wrap.
I heard during the speeches that they are aiming at launching IRNSS-1B, 1C and 1D in 2014
Targeting GSAT 7 (More communication transponders) dispatch from ISAC to Kourou on August 9, launch in 3rd/4th week of August.
Orange Smoke Trail of PSLV C22.https://www.facebook.com/photo.php?fbid=10151588423198224&set=a.10151576594773224.1073741832.32563513223From facebook.com/isro.org
I'm guessing that the IRNSS-R1A spacecraft will perform the perigee raising burns itself. How long will it take until it is in a near-circular 20k orbit?
What's the procedure for disposing of the fourth stage? Will it have to remain in orbit until that decays or is there enough propellent on board to lower the perigee so repeated aerobraking brings it down more quickly?
Orbit raising manoevers completed with fifth Apogee Motor Firing (AMF) on July 06, 2013 at 16:57 hrs (IST) and performance is normal.Satellite is in Geo-Synchronous Orbit (GSO) with 27 deg inclination at 44 deg E longitude.Present orbital parameters are : apogee 35870 km, perigee 35484 km and orbital period is 23h 50m.All the spacecraft subsystem are evaluated and functioning normal.
Did the satellite start broadcasting navigation signals? Have the signals been received?
In the NavIC, a constellation of seven satellites, one of the three crucial rubidium timekeepers on IRNSS-1A spacecraft failed six months ago. The other two followed subsequently.
A. S. Kiran Kumar, Chairman of the Indian Space Research Organisation, confirmed the glitch in the clocks but clarified that the satellite was otherwise all right, and the rest of the satellites were performing its core function of providing accurate position, navigation and time. However, without its clocks, the IRNSS-1A “will give a coarse value. It will not be used for computation. Messages from it will still be used.”
“There are some anomalies in the atomic clock system on board. We are trying to restart it. Right now we are working out a mechanism for operating it,” he told The Hindu.“The problem is only with the clock system of one spacecraft. The signals are all coming, we are getting the messages, everything else is working and being used, except the stability portion which is linked to the clock,” he said. A minimum of four working satellites was sufficient to realise the full use of the navigation system”.
NavIC has 21 atomic clocks on seven spacecraft. “How would the other clocks fare? Would ISRO reconsider the supplier of its atomic clocks? Such questions are not easy to answer. Generally any [space] hardware is an issue. We have to find ways of going around it,” he said.
The troubled IRNSS-1A spacecraft was put in space in July 2013 and has an expected life span of 10 years.
