Then this would leave the PSLV - C9 launch at least at second place for satellites deployed by the launch vehicle no? Not a bad record I'd say, certainly better than "nonsense".
:laugh:
Do you have any information about how the satellites of the Depnr launch of April 2007 were deployed?
Prao
Hi,
Has anyone got an idea on why ISRO launched TechSar & Cartosat 2A separtely with PSLV-CA versions. Earlier the news from ISRO was to send PSLV-XL version with TechSar, Cartosat2A together(along with 6 small sats) weighting up 1800kg. Mr Annadarai also confirmed that there would be test flight of PSLV-XL version before Chnadrayaan-1 to prove it capability. I have no idea on why suddenly they used the separate launchers
I guess: Either the launch parameters (height, inclination etc) may be different for both the missions or manufacuturer delay for Cartosat2A by the time Techsar was ready?
m.prasad - 29/4/2008 9:48 AM
Hi,
Has anyone got an idea on why ISRO launched TechSar & Cartosat 2A separtely with PSLV-CA versions. Earlier the news from ISRO was to send PSLV-XL version with TechSar, Cartosat2A together(along with 6 small sats) weighting up 1800kg. Mr Annadarai also confirmed that there would be test flight of PSLV-XL version before Chnadrayaan-1 to prove it capability. I have no idea on why suddenly they used the separate launchers
I guess: Either the launch parameters (height, inclination etc) may be different for both the missions or manufacuturer delay for Cartosat2A by the time Techsar was ready?
because of completly incompatible orbit requirements (Techsat in 450 x 580 km x 41°, Cartosat 2A in 635 km x 97.92° orbit)
Thank you for the clarification Krebs
prao - 28/4/2008 7:32 PM
Then this would leave the PSLV - C9 launch at least at second place for satellites deployed by the launch vehicle no? Not a bad record I'd say, certainly better than "nonsense".
:laugh:
Do you have any information about how the satellites of the Depnr launch of April 2007 were deployed?
Prao
Both directly and from PPODS, I think. I think they used the same methods on this launch as well. I also believe that RUBIN (intentionally) remained attached to the upper stage, so that means only 9 were deployed.
CARTOSAT-2A and IMS-1 Cameras Switched on
April 30, 2008
http://www.isro.org/pressrelease/April30_2008.htm The Polar Satellite Launch Vehicle (PSLV-C9) launched India’s Remote Sensing satellites CARTOSAT-2A and Indian Mini Satellite-1 (IMS-1) along with eight nanosatellites successfully on April 28, 2008 from Satish Dhawan Space Centre (SDSC) SHAR, Sriharikota. The telemetry data received indicates that all the subsystems of both the satellites are functioning satisfactorily and the health of the satellites is normal.
On April 29, 2008, the Multispectral camera onboard IMS-1 was switched on and high quality imagery covering Allahabad to Rameswaram was obtained. Today (April 30, 2008), the Hyper Spectral Imaging (HySI) camera onboard IMS-1 and panchromatic (PAN) camera onboard CARTOSAT-2A were switched on. Imagery from HySI camera covered Uttarakhand to Karnataka passing through Delhi and Bhopal. PAN camera covered strips of land from Saharanpur to Nuh (South of Delhi) and Sangli to Goa Coast. Data was received at National Remote Sensing Agency (NRSA), Shadnagar, Hyderabad. Quality of the imagery received is excellent.
Launch of PSLV-C9 is a significant milestone for the country, as it has again proved the reliability and versatility of PSLV and its ability to put satellites in different types of orbits, thus proving its commercial potential as well. This provides an excellent opportunity to undertake commercial launches of different class of satellites as stand-alone launches or as shared launches with our own satellites.
Has anybody got idea on what is DLA (Dual Lauch Adapter). Basically it is needed for satellites' mounting purposes and has been is use by ISRO from PSLV-C7 mission. But before this mission also, ISRO laucnched multiples satellite in single go. Then how this DLA helps?
Thanks in advance
m.prasad - 20/5/2008 3:23 PM
Has anybody got idea on what is DLA (Dual Lauch Adapter). Basically it is needed for satellites' mounting purposes and has been is use by ISRO from PSLV-C7 mission. But before this mission also, ISRO laucnched multiples satellite in single go. Then how this DLA helps?
Thanks in advance
It is a structure to launch similar sized large satellites. Before DLA, only small piggy-back payloads could be launched with the main payload.
It encapsulates the lower payload, while the upper is placed on the top of the DLA
http://www.isro.org/pslv-c7/photos/layout3.jpghttp://www.isro.org/pslv-c7/photos/FourSpacecrafts16.jpg
Thanks for the clarification Krebs. In the photoes, I could see main payload Cardosat on the top of the DLA and auxilory payload SRE-1 inside the DLA. I have one small question on this. How many similar sized (large) sats can be used with a DLA? I think it is 2. Then how about more than 2 sats case? Need one more DLA is attached to first one?
Only one DLA can be used on each PSLV launch - there is simply no more room available inside the fairing.
