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Chandrayaan-2 How

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chandrayaan-2

Chandrayaan-2 will consist of the spacecraft and a landing platform with the moon rover. The platform with the rover will detach itself off after the spacecraft reaches its orbit above the moon, and land on lunar.

A motorised rover will be released on the moon's surface from the lander. The location for the lander will be identified using data from Chandrayaan-1 pyaload MIP .

In Chandrayaan-1, MIP will itself from the spacecraft and it will impact on the moon's surface. The MIP will have three instruments. Annadurai, its mass spectrometer will sense the moon's atmospheric constituents as it keeps falling for 18 minutes and crashes on the moon. Its altimeter will measure the instantaneous altitude during its descent. Its video-imaging system will look at the moon from close proximity in order that ISRO scientists may take decisions on the terrain where it will land.

The rover will weigh between 30 kg and 100 kg, depending on whether it is to do a semi-hard landing or soft landing. The rover will have an operating life-span of a month. It will run predominantly on solar power.

If ISRO wants to operate the rover for two or three months, its engineers will configure the vehicle and its instruments including a battery back-up to go into a low-power mode, with the rover waking up when sunlight streams through. When the sunlight comes, the solar-powered battery cells will be re-charged and the equipment will be switched on one by one for the rover to function for another two weeks.The batteries will be re-charged every two weeks.

Landing Site

Two candidate landing sites near the Lunar south pole have reportedly been identified by the Russians, based on data from NASA's Lunar Reconnaissance Orbiter (LRO) and Japanese Selena orbiter, which entered lunar orbit in 2007.

The Russian developed Lunar Exploration Neutron Detector, LEND, installed on LRO was used to identify sunlit areas, potentially with sub surface ice. Imagery from Selena and data from LOLA laser altimeter on NASA’s LRO orbiter was used to profile the terrain in these areas.

To begin with 14 sites in sunlight areas close to the South Pole that possibly have subsurface ice were identified..

Nine of these sites were rejected at the outset by the lander team because the terrain was too rough for the landing system of the spacecraft.

The two sites have been short listed. The sites could change if the accuracy of the landing system is improved or based on other data.

Main: 87.2 deg S, 68 deg E, Shoemaker, Faustini

Backup: 88.5 deg S, 297 deg E, Gerlach

Last Updated ( Sunday, 12 December 2010 20:41 )