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#40 by William Graham on 28 Apr, 2008 03:58
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India seem to be claiming that 10 satellites is a new record. I'm sure other rockets have already launched more.
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#41 by William Graham on 28 Apr, 2008 03:59
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I think stage 2 separation has occurred, but I am not sure.
Apologies for any spelling mistakes and typos, it's 5am here, and I've been up all night. -
#42 by edkyle99 on 28 Apr, 2008 04:02
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#43 by William Graham on 28 Apr, 2008 04:05
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We've got the live feed back. now 666 secs into flight. Looks good.
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#44 by William Graham on 28 Apr, 2008 04:06
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625km altitude, 2900 downrange. Not sure if stage 4 is burning, or whether they're in a coast phase.
EDIT: Velocity is increasing, so they must be burning. -
#45 by William Graham on 28 Apr, 2008 04:08
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Burnout. Orbit achieved.
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#46 by William Graham on 28 Apr, 2008 04:09
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CartoSat separation confirmed at MET 883.8 secs
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#47 by William Graham on 28 Apr, 2008 04:10
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IMS-1 Separation at 928.8 secs.
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#48 by William Graham on 28 Apr, 2008 04:13
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Looks like the launch was a success.
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#49 by hornbill2007 on 28 Apr, 2008 06:02
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No word about the deployment of the eight nanosatellites in the news broadcasts. Only a claim to world records. ISRO need to come out with an official statement now. ISRO website is a pathetic one.
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#50 by William Graham on 28 Apr, 2008 06:15
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Quote
hornbill2007 - 28/4/2008 6:02 AM
No word about the deployment of the eight nanosatellites in the news broadcasts. Only a claim to world records. ISRO need to come out with an official statement now. ISRO website is a pathetic one.
The world record claim is nonsense. Russia and America have launched far more than ten satellites on one rocket, on several occasions in the past. -
#51 by jacqmans on 28 Apr, 2008 07:21
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April 28, 2008
In its thirteenth flight conducted from Satish Dhawan Space Centre (SDSC) SHAR, Sriharikota, today (April 28, 2008), ISRO’s Polar Satellite Launch Vehicle, PSLV-C9, successfully launched the 690 kg Indian remote sensing satellite CARTOSAT-2A, the 83 kg Indian Mini Satellite (IMS-1) and eight nanosatellites for international customers into a 637 km polar Sun Synchronous Orbit (SSO). PSLV-C9 in its ‘core alone’ configuration launched ten satellites with a total weight of about 820 kg.
After the final count down, PSLV-C9 lifted off from the second launch pad at SDSC SHAR, at 09:24 Hrs IST with the ignition of the core first stage. The important flight events included the separation of the first stage, ignition of the second stage, separation of the heatshield at about 125 km altitude after the vehicle had cleared the dense atmosphere, second stage separation, third stage ignition, third stage separation, fourth stage ignition and fourth stage cut-off.
The 690 kg main payload, CARTOSAT-2A, was the first satellite to be injected into orbit at 885 seconds after lift-off at an altitude of 637 km. About 45 seconds later, Indian Mini Satellite (IMS-1) was separated after which all the nano satellites were separated in sequence. The initial signals indicate normal health of the satellites.
CARTOSAT-2A
CARTOSAT-2A is a state-of-the art remote sensing satellite with a spatial resolution of about one metre and swath of 9.6 km. The satellite carries a panchromatic camera (PAN) capable of taking black-and-white pictures in the visible region of electromagnetic spectrum. The highly agile CARTOSAT-2A is steerable along as well as across the direction of its movement to facilitate imaging of any area more frequently.
Soon after separation from PSLV fourth stage, the two solar panels of CARTOSAT-2A were automatically deployed. The satellite’s health is continuously monitored from the Spacecraft Control Centre at Bangalore with the help of ISTRAC network of stations at Bangalore, Lucknow, Mauritius, Bearslake in Russia, Biak in Indonesia and Svalbard in Norway.
High-resolution data from CARTOSAT-2A will be invaluable in urban and rural development applications calling for large scale mapping.
Indian Mini Satellite (IMS -1)
Indian Mini Satellite (IMS-1), flown as an auxiliary payload on board PSLV-C9, is developed by ISRO for remote sensing applications. Weighing 83 Kg at lift-off, IMS-1 incorporates many new technologies and has miniaturised subsystems. IMS-1 carries two remote sensing payloads - A Multi-spectral camera (Mx Payload) and a Hyper-spectral camera (HySI Payload), operating in the visible and near infrared regions of the electromagnetic spectrum. The spatial resolution of Mx camera is 37 metre with a swath of 151 km while that of HySI is about 506 metre with a swath of about 130 km. The data from this mission will be made available to interested space agencies and student community from developing countries to provide necessary impetus to capacity building in using satellite data. The versatile IMS-1 has been specifically developed to carry different payloads in future without significant changes in it and has a design life time of two years.
Nano Satellites for International Customers
Eight Nanosatellites from abroad are carried as auxiliary payloads besides IMS-1 as well as CARTOSAT-2A. The total weight of these Nanosatellite payloads is about 50 Kg. Six of the eight Nanosatellites are clustered together with the collective name NLS-4. The other two nanosatellites are NLS-5 AND RUBIN-8. NLS-4, developed by University of Toronto, Canada consists of six nano-satellites developed by various universities. Two of them - CUTE 1.7 and SEEDS - are built in Japan, while the other four - CAN-X2, AAUSAT-II, COMPASS-1 and DELPHI-C3 are built in Canada, Denmark, Germany and the Netherlands respectively. NLS-5 is also built by University of Toronto and RUBIN-8 is built by Cosmos International, Germany. The eight nanosatellite payloads of PSLV-C9 are built to develop nano technologies for use in satellites as well as for the development of technologies for satellite applications.
In its twelve consecutively successful flights so far, PSLV has repeatedly proved itself as a reliable and versatile workhorse launch vehicle. It has demonstrated multiple satellite launch capability having launched a total of sixteen satellites for international customers besides thirteen Indian payloads which are for remote sensing, amateur radio communications and Space capsule Recovery Experiment (SRE-1). PSLV was used to launch ISRO’s exclusive meteorological satellite, KALPANA-1, into a Geosynchronous Transfer Orbit (GTO) in September 2002 and thus proved its versatility. The same vehicle will be used to launch Chandrayaan-1 spacecraft, India’s first mission to Moon during this year.
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#52 by hesidu on 28 Apr, 2008 07:28
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Congratulations to ISRO !
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#53 by input~2 on 28 Apr, 2008 07:30
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Jacques,
Could you please mention the sources of your quotes?
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#54 by jacqmans on 28 Apr, 2008 07:48
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#55 by Skyrocket on 28 Apr, 2008 08:41
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Quote
GW_Simulations - 28/4/2008 8:15 AM
Quotehornbill2007 - 28/4/2008 6:02 AM
No word about the deployment of the eight nanosatellites in the news broadcasts. Only a claim to world records. ISRO need to come out with an official statement now. ISRO website is a pathetic one.
The world record claim is nonsense. Russia and America have launched far more than ten satellites on one rocket, on several occasions in the past.
The Minotaur-1 launch of 26. January 2000 put 11 payloads into orbit
The Dnepr-1 launch of 15. June 2007 orbited 14 payloads
If we count passive calibration subsats, a number of soviet Taifun-2 satellites deployed each 24 subsatellites. And two Koltso (Kosmos 1985, 2053) deployed each 36 subsatellites.
And there is also Project Westford. As each of the dipoles is a deliberately deployed object, the number of simultaneously launchd "payloads" is about 480 million.
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#56 by isro-watch on 28 Apr, 2008 08:42
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the story that isro's creadting a world record is just some publicity stunt by one private news channel...isro never claimed it officially...
all info is on :
www.isro.org -
#57 by edkyle99 on 28 Apr, 2008 14:54
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isro-watch - 28/4/2008 3:42 AM
the story that isro's creadting a world record is just some publicity stunt by one private news channel...isro never claimed it officially...
all info is on :
www.isro.org
Yes. It is mere hyperbole, as when U.S. sportscasters call the Major League baseball World Series winner the "World Champion", when in fact Japan's national team is the most recent winner of the true world championship, the World Baseball Classic, etc..
- Ed Kyle -
#58 by prao on 28 Apr, 2008 19:03
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The claims of a record # of satellites launched by a single rocket may not be quite right (ISRO hasn't made any such claim - it does seem that it was created by some news agency). On the other hand, I'm not quite sure it's nonsense either. I looked into the launches posted by Gunter Krebs (cursorily I admit) and it seems to me that his claims may not be quite right (However, I stand ready to be corrected). For example the according to the Wikipedia, the Minotaur launch of Jan 26, 2000 launched a single satellite called the JAWSAT which then proceeded to deploy four microsatellites of it's own for a total of 5 (not 11 satellites). See:
http://en.wikipedia.org/wiki/Minotaur_%28rocket%29 and the link to JAWSAT
I wonder also if this method of launching multiple satellites isn't different technically from the PSLV's launch of all satellites by the fourth stage itself. If it is then it doesn't really make sense to compare this PSLV launch with either the Minotaur launch of Jan 26, 2000 or the Taifun or Koltso launches quoted by the same poster does it?
This then leaves the Depnr launch of 15 June, 2007. Again going by the Wikipedia, it appears that that launch carried only one satellite, the TerraSAR-X. However the 17 April, 2007 launch appears to have carried 10 (or more? - not clear) satellites. The article doesn't give any informaiton about how the satellites were deployed - i.e whether they were deployed by the launch vehicle or by one of the satellites.
However the 26 July, 2006 launch of the same launcher attempted to deploy 18 satellites but that launch ended in failure. See:
http://en.wikipedia.org/wiki/Dnepr_rocket
Project Westford dates from 1963 and calling it a launch of 480 million satellites is really playing with words. If "deliberately deployed" means separately and intentionally deployed, this certainly doesn't qualify. From what I could find:
"Inside the West Ford spacecraft, the needles were packed densely together in blocks made of a napthalene gel that would rapidly evaporate in space. This entire package of needles weighed only 20 kg. After being released, the hundreds of millions of copper needles gradually spread throughout their entire orbit over a period of two months. The final donut-shaped cloud was 15 km wide and 30 km thick and encircled the globe at an altitude of 3700 km. "
This is hardly a deliberate deployment. If this is to be considered what are we to make of the satellite destroyed by China by an explosive not too long ago? Surely that's a launch of a few thousand mini (and micro) satellites no?
Comments?
P
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#59 by Skyrocket on 28 Apr, 2008 19:07
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prao - 28/4/2008 9:03 PM
This then leaves the Depnr launch of 15 June, 2007. Again going by the Wikipedia, it appears that that launch carried only one satellite, the TerraSAR-X. However the 17 April, 2007 launch appears to have carried 10 (or more? - not clear) satellites. The article doesn't give any informaiton about how the satellites were deployed - i.e whether they were deployed by the launch vehicle or by one of the satellites.
Sorry, i took the date from the wrong line - it is the 17 April, 2007 launch with 14 satellites
