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UPSC;ISRO;PSLV-SpaDEX; GS-3;SCIENCE AND TECHNOLOGY; SPACE TECHNOLOGY;

 

  •   The Indian Space Research Organisation  launched  the PSLV C60/SpaDeX mission 
  •  The Polar Satellite Launch Vehicle  lifted  from the Satish Dhawan Space Centre in Sriharikota. 
  •  The space agency, for the first time, will be at tempting the Space Docking Experiment (SpaDeX), which will demonstrate in space docking using two small spacecraft. 
  •  According to the ISRO, SpaDeX is designed to develop and demonstrate the technology needed for spacecraft rendezvous, docking, and undocking using two small satellites. 
  •  “SpaDeX will serve as a miles tone in advancing India’s capabilities in space docking, a critical technology for future space missions, including satellite servicing, space station operations, and interplanetary missions,”. 
  • The demonstration of this technology is essential for futuristic missions such as:-
  •     1.   sending an Indian astranaut on the moon, 
  •     2. sample return from the moon, 
  •     3. the building and operation of an Indian space station. 



  •  features:-
  •  The PSLV-C60 will launch the two small spacecraft, Chaser and Target, also named SDX01 and SDX02, 
  • weighing about 220 kg each,
  •  into a 470-km circular orbit at a 55-degree inclination separately.
  •  The SDX02 spacecraft will be the first to separate 15 minutes after the launch followed by the SDX01 a few seconds later. 

  •  Incremental velocity -“The demonstrated precision of the PSLV vehicle will be utilised to give a small relative velocity bet ween the Target and Chaser spacecraft at the time of separation from the launch vehicle. 
  • This incremental velocity will allow the Target spacecraft to build a 10- 20 km inter-satellite separation with respect to the Chaser within a day. 
  • At this point, the relative velocity between the Target will be compensated using the propulsion system of the Target spacecraft,” the ISRO said.
  •  It added that at the end of this drift arrest manoeuvre, Target and Chaser will be in the same orbit with identical velocity but separated by about 20 km, known as Far Rendezvous. “With a similar strategy of introducing and then compensating for a small relative velocity between the two spacecraft, the Chaser will approach the Target with progressively reduced inter-satellite distances, ultimately leading to the docking of the two space craft,” . 
  • The docking is expected to take place in the first week of January. 
  • Twenty-four PS4-Orbital Experiment Module pay loads will be also be flown onboard the PSLV-C60.


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