PSLV Successfully Launches Four Satellites<br /><br />anuary 10, 2007 <br /> <br /> <br /><br />In its tenth flight conducted from Satish Dhawan Space Centre (SDSC) SHAR, Sriharikota, today (January 10, 2007), ISRO’s Polar Satellite Launch Vehicle, PSLV-C7, successfully launched four satellites -- India’s CARTOSAT-2 and Space capsule Recovery Experiment (SRE-1), Indonesia’s LAPAN-TUBSAT and Argentina’s PEHUENSAT-1 into a 635 km high polar orbit. For the first time, a Dual Launch Adopter (DLA) was used in PSLV to accommodate two primary satellites in tandem.<br /><br />?After the final count down, PSLV-C7 lifted off from the first launch pad at SDSC SHAR, at 9.23 am with the ignition of the core first stage and four of the six strap-on motors. The remaining two strap-on motors were ignited at 25 sec after lift-off. The important flight events included the separation of the ground-lit strap-on motors, separation of air-lit strap-on motors and the first stage, ignition of the second stage, separation of the heatshield at about 121 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.<br /><br />The 680 kg main payload, CARTOSAT-2, mounted over DLA, was the first satellite to be injected into orbit at 981.3 sec after lift-off at an altitude of 639 km. About 45 sec later, DLA with the 6 kg PEHUENSAT-1 mounted on it, was separated. 120 sec later, the 550 kg Space capsule Recovery Experiment (SRE-1) mounted inside DLA was separated and finally, 190 sec later, the 56 kg LAPAN-TUBSAT, mounted on the equipment bay of PSLV fourth stage was separated.<br /><br />The four satellites have been placed in a polar orbit at an altitude of 637 km with an inclination of 97.9 deg with respect to the equator. The initial signals indicate their normal health.<br /><br />PSLV is the workhorse launch vehic
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Congrats!!<br /><br />Any word on how Avatar is progressing, if at all? <div class="Discussion_UserSignature"> </div>
Congratulations to India! Very impressive.<br /><br />This press release seemed to me very well written as well. Lotsa juicy technical details but also gives a good overview of the program. <div class="Discussion_UserSignature"> </div>
Wow.<br /><br />Very nice. Congrats India.<br /><br />Also a slow but steady space program<br />http://isro.org/mileston.htm<br /><br />Quite different approach than other space programs. <div class="Discussion_UserSignature"> <p> </p><p><font color="#0000ff"><em>"SCE to AUX" - John Aaron, curiosity pays off</em></font></p> </div>
I'm glad they finally got the Space-capsule Recovery Experiment launched. It will be interesting to see the results.
<blockquote><font class="small">In reply to:</font><hr /><p>SRE-1 is being tracked and monitored by ground stations at Bangalore, Lucknow, Mauritius, Biak in Indonesia, Bearslake in Russia, Saskatoon in Canada and Svalbard in Sweden/Transo in Norway.<p><hr /></p></p></blockquote>What?! Svalbard is a part of the Kingdom of Norway, not Sweden. The second name should also be Tromsø, not Transo.
<p>Avatar Seems to be in progress, here is the Scramjet Engine report from ISRO<br />ISRO On Airbreathing propulsion<br /><br />2006<br /><br />Air Breathing Propulsion<br /><br />Air- Breathing rocket systems are the ones which use the atmospheric oxygen from their surroundings and burn it with the stored on- board fuel for producing the forward thrust in contrast to the conventional chemical rocket systems which carry both the oxygen and fuel on-board. As a result, the Air-Breathing systems become much lighter and more efficient leading to reduced overall costs. As the Air- Breathing systems have the capability to operate only during the atmospheric phase of flight, they always have to be adopted along with the conventional chemical rockets, for meeting the final orbital velocity requirements.<br /><br />Air-Breathing engines like the turbojet engines used in aircraft have limitations of operating only up to a maximum of Mach number 3. To travel beyond these Mach number regimes, SCRAMJET propulsion is the only viable option. The development of SCRAMJET system is quite complex and it involves a number of technological challenges, especially those related to the mixing of very high speed air (velocity around 1.5 km/s) with fuel, achieving stable ignition and flame holding in addition to ensuring efficient combustion, within the practical length of the combustor.<br /><br />As part of the advanced technology initiative in the area of Air-Breathing propulsion, the design, development, characterisation and realisation of the Supersonic Combustion Ramjet (SCRAMJET) has been successfully carried out through a series of ground tests and a stable supersonic combustion demonstrated for nearly 7 seconds with an inlet Mach number of 6 (six times the speed of sound). The breakthrough is significant in the context of this technology being in a very nascent stage of development the world over.<br /><br /></p>
Picture<br /><br />As part of the advanced technology initiative in the area of Air-Breathing propulsion, the design, development, characterisation and realisation of the Supersonic Combustion Ramjet (SCRAMJET) has been successfully carried out through a series of ground tests and a stable supersonic combustion demonstrated for nearly 7 seconds with an inlet Mach number of 6 (six times the speed of sound). 2006<br /><br />Picture: Indian Space Research Organisation
Indian space capsule returns to Earth<br /><br />Monday, January 22, 2007 (Thiruvananthapuram):<br /><br />An Indian space capsule weighing 550 kg has been guided back to Earth.<br /><br />Indian space agency ISRO said the capsule splashed down in the Bay of Bengal.<br /><br />It added, efforts are underway to locate it and bring it ashore.<br /><br />Only three other countries, Russia, America and China have mastered this complex technology.<br /><br />It is seen as India's first steps towards undertaking a manned mission.<br /><br />The spindle shaped space capsule that was launched on top of the Polar Satellite Launch Vehicle or the PSLV is India's first attempt to see if orbiting objects can be safely brought back to earth.
![url]](/proxy.php?image=http%3A%2F%2F%5Burl%3Dhttp%3A%2F%2Fwww.telegraphindia.com%2F1070123%2Fimages%2F23capsule.jpg%5Dhttp%3A%2F%2Fwww.telegraphindia.com%2F1070123%2Fimages%2F23capsule.jpg%5B%2Furl%5D&hash=34a5b7e8d7664c07a38a464d65d3866f)
They even beat the Europe/ESA to successfully testing reentry technology!!<br /><br />They should be proud.
Good for India, its good to see another nation join the club. It should be interesting, its rather exciting to see more nations being able to do this and it brings things more forward on many different levels. India has done well, congrats.<br /><br />A
Few points here<br />1) The Casule project started just 4 years ago. Now they validated it. <br />2) The Capsule splash down had a accuracy of 20 kms from its intended splash down edtimated point. Circular Error Probability of 20 Kms is awesome.<br /><br />http://www.hindu.com/2007/01/23/images/2007012314650101.jpg<br /><br /> MISSION ACCOMPLISHED: Satellite SRE-I, with the floatation system on top, being lifted from Coast Guard vessel "Sarang" at the Ennore port, near Chennai, on Monday<br /><br />Read this<br /><br />http://www.hindu.com/2007/01/23/stories/2007012314650100.htm<br /><br />
Well done, India.<br /><br />And the capsule looks like a badminton bird. Pretty neat and simple design. <div class="Discussion_UserSignature"> <p> </p><p><font color="#0000ff"><em>"SCE to AUX" - John Aaron, curiosity pays off</em></font></p> </div>
<blockquote><font class="small">In reply to:</font><hr /><p>They even beat the Europe/ESA to successfully testing reentry technology!!<p><hr /></p></p></blockquote>No, they didn't.<br /><br />http://en.wikipedia.org/wiki/Atmospheric_Reentry_Demonstrator
<blockquote><font class="small">In reply to:</font><hr /><p>MISSION ACCOMPLISHED: Satellite SRE-I, with the floatation system on top, being lifted from Coast Guard vessel "Sarang" at the Ennore port, near Chennai, on Monday<p><hr /></p></p></blockquote>That is very good news. <img src="/images/icons/smile.gif" />
Phew! My mistake; thought they that ARD mission was never flown. Shame we're not using it for anything now though.
<blockquote><font class="small">In reply to:</font><hr /><p>Shame we're not using it for anything now though.<p><hr /></p></p></blockquote>Yes, with the ATV service module you have the beginnings of a proper spacecraft,
I was confused by the small picture at telegraphindia.com but the large one at hindu.com explains everything. Thanks for the pictures and congratulations to India for a successful landing. <div class="Discussion_UserSignature"> </div>
Sarang? That's a nice name. (It also happens to be the Korean word for love) <div class="Discussion_UserSignature"> <p>----- </p><p>http://mithridates.blogspot.com</p> </div>
Another step in the right direction for India. I'm certainly looking forward to their progress over the next decade. <br /><br />For those interested, here and here are some pics of the SRE just after splashdown. I was suprised to read on wikipedia that the thing is quite large, 2m in diameter and 1.6m high and weighing in at 550 kg. <br /><br />
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