Chandrayaan-3

Chandrayaan-3

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To achieve the mission objectives, several advanced technologies are present in Lander such as :

Altimeters: Laser & RF based Altimeters
Velocimeters: Laser Doppler Velocimeter & Lander Horizontal Velocity Camera
Inertial Measurement: Laser Gyro based Inertial referencing and Accelerometer package
Propulsion System: 800N Throttleable Liquid Engines, 58N attitude thrusters & Throttleable Engine Control Electronics
Navigation, Guidance & Control (NGC): Powered Descent Trajectory design and associate software elements
Hazard Detection and Avoidance: Lander Hazard Detection & Avoidance Camera and Processing Algorithm
Landing Leg Mechanism.

To demonstrate the above said advanced technologies in earth condition, several Lander special tests have been planned and carried out successfully viz.

Integrated Cold Test - For the demonstration of Integrated Sensors & Navigation performance test using helicopter as test platform
Integrated Hot test – For the demonstration of closed loop performance test with sensors, actuators and NGC using Tower crane as test platform
Lander Leg mechanism performance test on a lunar simulant test bed simulating different touch down conditions.

The overall specifications for Chandrayaan-3 is provided below :

Landing Site (Prime) :

4 km x 2.4 km 69.367621 S, 32.348126 E

Science Payloads :

Radio Anatomy of Moon Bound Hypersensitive ionosphere and Atmosphere (RAMBHA)
Chandra’s Surface Thermo physical Experiment (ChaSTE)
Instrument for Lunar Seismic Activity (ILSA)
Laser Retroreflector Array (LRA) Rover
Alpha Particle X-Ray Spectrometer (APXS)
Laser Induced Breakdown Spectroscope (LIBS) Propulsion Module
Spectro-polarimetry of HAbitable Planet Earth (SHAPE)

Chandrayaan's path around the moon.

Lander Propulsion System :

Bi-Propellant Propulsion System (MMH + MON3), 4 nos. of 800 N Throttleable engines & 8 nos. of 58 N; Throttleable Engine Control Electronics

Lander Mechanisms :

Lander leg
Rover Ramp (Primary & Secondary)
Rover
ILSA, Rambha & Chaste Payloads
Umbilical connector Protection Mechanism
X- Band Antenna

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