Chandrayaan-3 Lander Module Configuration

The demonstration of soft landing on lunar surface is a critical aspect for ISRO’s future inter-planetary missions. The second Indian mission to Moon, Chandrayaan-2 could not demonstrate soft landing in the final phases of its descent. Keeping this in mind, subsequently, as a follow on mission, Chandrayaan-3 was planned to achieve safe and soft landing on lunar surface for which its configuration was worked out considering the experience gained from Chandrayaan-2 performance. The Lander was made more robust and also strengthened to autonomously handle wider dispersions of parameters to achieve safe and soft landing. Improved descent trajectory with multiple mission path options to handle contingencies, design improvements in heritage sensors, enhanced guidance algorithms, complete redundancy implementation, overall system improvisation, enhanced Lander leg design to handle higher touchdown velocities, software improvements, enhanced Landing site area using Chandrayaan- 2 Orbiter High Resolution Camera (OHRC) camera images, extensive ground tests and on orbit characterization plan of Chandrayaan-3 Lander before power descent has enhanced the overall robustness of Lander. On 23rd August, 2023 Chandrayaan-3 Vikram Lander along with the Pragyan Rover executed a flawless landing on marking a significant milestone in India’s iconic space journey. This achievement has placed India as the fourth country to successfully master the technology of soft-landing on the Moon and first country to land a Lander and Rover near to lunar south pole. This paper brings out the overview of Lander along with details pertaining to its configuration, brief specifications, tests conducted, mission operations and mission accomplishments as well as in-situ science experiments