ISRO SDX02

Here are 11 multiple-choice questions (MCQs) about the ISRO SDX02 (Space Docking Experiment) mission with detailed explanations:

1. What was the role of SDX02 in the SpaDeX mission?

A) Active Chaser  

B) Passive Target  

C) Communication Relay  

D) Earth Observation

   Answer: B) Passive Target Explanation: In the SpaDeX mission, SDX02 served as the 'Target' satellite, with SDX01 being the 'Chaser.' The role of SDX02 was to be the stationary object that SDX01 would dock with.

2. Which payload does SDX02 carry for vegetation and natural resource monitoring?

A) High-Resolution Camera (HRC)  

B) Miniature Multi-Spectral Payload (MMX)  

C) Radiation Monitor (RadMon)  

D) Synthetic Aperture Radar (SAR)

   Answer: B) Miniature Multi-Spectral Payload (MMX) Explanation: SDX02 is equipped with the Miniature Multi-Spectral Payload for detailed monitoring of vegetation and natural resources from space.

3. What kind of sensor suite does SDX02 use for docking with SDX01?

A) Only optical sensors  

B) Magnetic sensors  

C) Proximity and docking sensors  

D) Thermal sensors

   Answer: C) Proximity and docking sensors Explanation: For the docking procedure, SDX02 utilizes a suite of sensors including proximity sensors to ensure precise alignment and docking with SDX01.

4. What significant event involving SDX02 occurred on January 11, 2025?

A) Launch  

B) First communication with Earth  

C) Docking experiment trial  

D) Entry into hibernation mode

   Answer: C) Docking experiment trial Explanation: On January 11, 2025, SDX02 was part of a trial docking attempt where both it and SDX01 maneuvered to within 3 meters of each other, showcasing the technology's potential.

5. What was the original planned docking date for SDX02 with SDX01?

A) January 7, 2025  

B) January 9, 2025  

C) January 10, 2025  

D) January 12, 2025

   Answer: A) January 7, 2025 Explanation: The docking was initially planned for January 7, but due to technical challenges, it was postponed to January 9 and further delayed.

6. Which of the following is a function of the Radiation Monitor (RadMon) on SDX02?

A) Monitoring solar flares  

B) Studying cosmic background radiation  

C) Measuring radiation levels for Gaganyaan planning  

D) Detecting dark matter

   Answer: C) Measuring radiation levels for Gaganyaan planning Explanation: The Radiation Monitor on SDX02 collects data on radiation levels in space, which is crucial for planning manned missions like Gaganyaan.

7. What was the final inter-satellite distance achieved during the trial on January 11, 2025?

A) 15 meters  

B) 100 meters  

C) 3 meters  

D) 500 meters

   Answer: C) 3 meters Explanation: During the trial, SDX01 and SDX02 successfully came within 3 meters of each other before being repositioned to a safer distance for further analysis.

8. What was the orbital inclination of SDX02 after launch?

A) 0°  

B) 35°  

C) 55°  

D) 90°

   Answer: C) 55° Explanation: Both satellites, including SDX02, were placed into an orbit with an inclination of 55° to ensure optimal conditions for the docking experiments.

9. What was the weight of each SpaDeX satellite, including SDX02?

A) 100 kg  

B) 220 kg  

C) 350 kg  

D) 500 kg

   Answer: B) 220 kg Explanation: Each of the SpaDeX satellites, including SDX02, weighs approximately 220 kg, designed to be lightweight for the experimental mission.

10. What was the outcome of the third docking attempt involving SDX02?

A) Successful docking  

B) Postponed due to weather  

C) Cancelled due to sensor delay  

D) Rescheduled for the next month

   Answer: C) Cancelled due to sensor delay Explanation: The third docking attempt was cancelled because of a delay in receiving signals from the proximity and docking sensors, which led to the satellites being moved to a safe distance.

11. Which organization developed the Bhartiya Docking System (BDS) used by SDX02?

A) NASA  

B) ESA  

C) ISRO  

D) JAXA

   Answer: C) ISRO Explanation: The Bhartiya Docking System, pivotal for the docking experiments, was developed by ISRO, based on the International Docking System Standard (IDSS) but with indigenous innovations.

These questions cover various operational, technical, and scientific aspects of the SDX02 satellite in the context of ISRO's SpaDeX mission, providing a thorough understanding of its role and achievements.