Reportedly moon landing, the main part of india's second lunar mission Chandrayaan-2 is not like an aircraft taking off from one airport and landing in another. Meanwhile from the blasting off of the india's heavy lift rocket, Geosynchronous Satellite Launch Vehicle Mark III (GSLV-Mk III), from the rocket port in Sriharikota on July 15, till the Lander Vikram lands on the moon's surface on September 6, the challenges are many, said Indian Space Research Organization (ISRO).
Furthermore to start with, the about 3.844 lakh km distance between the earth and the moon. Apparently ensuring trajectory accuracy while travelling such a long distance is a challenge as trajectory is influenced by the non-uniform gravity of the earth and the moon, gravitational pull of other astronomical bodies, solar radiation pressure and the moon's true orbital motion.
Moreover the next challenge is the deep space communication link between the ISRO and the Chandrayaan-2. Perhaps owing to the distance, limited on-board power, radio signals will be weak with heavy background noise and the signals have to be picked up by large antennas. Moreover the descent trajectory of vikram has to take into account the variation in local gravity.