Chandrayaan-3

Chandrayaan-3 Mission Overview:

1. Chandrayaan-3 is a follow-on mission to Chandrayaan-2.
2. Its goal is to demonstrate safe landing and roving capabilities on the lunar surface.
3. The mission includes a Lander and Rover configuration.
4. It will be launched by LVM3 from SDSC SHAR, Sriharikota.
5. The propulsion module will transport the lander and rover to a 100 km lunar orbit.
6. The propulsion module contains the SHAPE payload for studying Earth from lunar orbit.

Lander Payloads: 7. ChaSTE measures thermal conductivity and temperature.

8. ILSA measures seismic activity around the landing site.
9. Langmuir Probe estimates plasma density variations.
10. NASA’s Laser Retroreflector Array for lunar laser ranging.

Rover Payloads: 11. APXS and LIBS perform elemental composition analysis.

12. Chandrayaan-3 aims to develop and demonstrate technologies for interplanetary missions.
13. The lander can soft land and deploy the rover for chemical analysis.
14. Chandrayaan-3 will use LVM3 M4 launcher for placement in an elliptic parking orbit.

Mission Objectives: 15. Demonstrate safe and soft landing on the lunar surface.

16. Demonstrate rover mobility on the Moon.
17. Conduct in-situ scientific experiments.

Lander Advanced Technologies: 18. Altimeters: Laser and RF-based altimeters.

19. Velocimeters: Laser Doppler Velocimeter and Lander Horizontal Velocity Camera.
20. Inertial Measurement: Laser Gyro-based referencing and accelerometer package.
21. Propulsion System: Throttleable liquid engines and attitude thrusters.
22. Navigation, Guidance & Control: Powered descent trajectory design and software elements.
23. Hazard Detection and Avoidance: Lander Hazard Detection & Avoidance Camera and Algorithm.
24. Lander leg mechanism and performance tests.

Specifications: 25. Mission life: One lunar day (~14 Earth days).

26. Landing site: 4 km x 2.4 km area.
27. Mass: Propulsion Module (2148 kg), Lander Module (1752 kg including 26 kg rover).
28. Power generation: Propulsion Module (758 W), Lander Module (738 W with bias), Rover (50 W).
29. Communication: Propulsion and Lander Modules communicate with IDSN.
30. Lander Sensors: Various sensors for navigation, altitude, velocity, and hazard detection.

Payload Objectives: 31. RAMBHA aims to measure plasma density near the lunar surface.

32. ChaSTE studies thermal properties of lunar surface near polar region.
33. ILSA measures lunar seismic activity and crust/mantle structure.
34. LIBS provides elemental analysis, while APXS determines elemental composition of lunar soil and rocks.
35. SHAPE payload for spectro-polarimetry of habitable planets.

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