PSLV-C7

PSLV launch
Launch	1 October 2007 (2007-10-01), 03:54 UTC
Operator	ISRO
Pad	Sriharikota
Payload	Cartosat-2 SRE-1 LAPAN-TUBsat Pehuensat-1
Outcome	Success
PSLV launches
← PSLV-C8 PSLV-C9 →

PSLV-C7 was a mission of the IndianPolar Satellite Launch Vehicle (PSLV) rocket, launched on January 10, 2007, by theIndian Space Research Organisation (ISRO) from theSatish Dhawan Space Centre atSriharikota, Andhra Pradesh.

The mission consisted ofSpace Capsule Recovery Experiment,ISRO's first reentry mission,^[1] along withCartosat-2, anEarth observation satellite,LAPAN-TUBsat,Indonesia's firstremote sensing satellite, andPehuensat-1, an Argentine educational satellite.^[2]

The mission was an important mission is the history ofPSLV, because it had many new additions to the rocket. The mission also had the first use of Dual Launch Adapter, (DLA).^[3]

• First reentry Experiment ofISRO
• Altitude based Day of Launch (DOL) wind biased steering program during Open Loop Guidance
• Deletion of SITVC system of airlit strap-on.
• PS1 SITVC Injectant loading reduced by 500 kg.
• Use of externally fabricated nozzles for the two motors.
• Use of Dual Launch Adapter (DLA)
• First use of 2 ton liquid stage for fourth stage.
• Video Imaging System to capture payloads (Cartosat-2 & SRE) and DLA separation events.
• Internal vehicle length increased by 2.25 m with the Introduction of DLA.
• Flight sequence modified for multiple satellite/DLA separation.^[4]

This was the tenth Launch of thePSLV rocket. It launched at 03:53UTC on January 10, 2007, fromSriharikota.^[4]

• The first stage, of six solid propellant strap-ones, ofHTPB fuel, ignited at Launch. They burned for 113 seconds and got disposed.
• The second stage ofUH 25 andN2O4 fuel, got ignited at 113 seconds. This was followed by aHeat shield separation and separation of PS2 at 264 seconds.
• PS3 ignited at 265 seconds and separated at 513 seconds.
• PS4 ignited at 533 seconda and cut off at 942 seconds.
• Cartosat-2 separated at 979 seconds at an altitude of 639 km.
• Dual Launch Adapter separated at 1024 seconds
• SRE separated at 1099 seconds at 641 km altitude.
• LAPAN-TUBsat separated at 1169 seconds at an altitude of 642 km.

The Space Capsule Recovery Experiment (SCRE or more commonly SRE or SRE-1) is an Indian experimentalspacecraft. It's the first step in theirGaganyaan program ofISRO which aim to send humans to space. It orbited the Earth for 12 days before re-entering the Earth's atmosphere and splashing down into theBay of Bengal at 04:16UTC on January 22.^[5] It also did Research on reusableThermal Protection System, navigation, guidance and control, hypersonic aero-thermodynamics, management of communication blackout, deceleration and flotation system and tested recovery operations.^[6]

Cartosat-2 is anEarth observation satellite in aSun-synchronous orbit and the second of theCartosat series of satellites. It consists of apanchromatic (PAN) camera that take black and white pictures of theEarth in thevisible region of theelectromagnetic spectrum. It can produce images 1 metre in resolution.^[7]

Pehuensat-1 is an Argentinian amateur Radio satellite created by students ofUniversidad Nacional del Comahue.^[8]LAPAN-TUBsat is an Indonesian micro satellite, weighing 56 Kilograms, orbiting at 630 kilometers above Indonesia. This satellite travels throughpolar orbit across the archipelago two or three times each day.

It's an adapter designed to carry medium class (~1000 kg) payloads inPSLV. It consists of a Carbon Fibre composite, arranged in Honeycomb sandwich shells. With analuminum core. It consists of three structures, DLA-U (upper), DLA-M (middle), and DLA-L (lower). DLA is mounted of the fourth stage of PS4, by bolting the DLA-L with Payload Adapter (PLA). DLA-U carriesCartosat-2, andSRE is connected to PLA via a band clamp separation system. DLA includes cutouts in which electrical connectors, sensors, cooling system of the satellite etc. can be mounted.

Team of ISRO scientists who were part of the mission were awarded the prestigious team achievement award of theInternational Academy of Astronautics. The award was given to them atGlasgow, on September 28.

ISRO ChairmanMadhavan Nair told the press "We've done it perfectly", after the launch.^[9] Dr V Jayaraman, director, earth observation system, said "We believe we can offer our products at one-fifth of the cost of our competitors, The size of the international market (for such images) is about $300 million-$500 million."

The PSLV-C7 team was led by

• N Narayana Murthy, Project Director,Cartosat-2
• George Koshy, Vehicle Director, PSLV-C7
• Cartosat-2 by M Krishnaswamy, Programme Director, IRS.
• SRE-1 by A Subramoniam
• Ground support team by S K Shivakumar, Director,ISTRAC.
• Overall co-ordination by P S Sastry, Director, LVPO at ISRO Headquarters, Bangalore.^[10]

• ISRO space launch vehicles

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