Mars Orbiter Mission’s great night tonight, spacecraft will be hurled to an apogee of almost one lakh kilometres : worldleaks


worldleaks mars orbiter
Tonight will be the great night for the Mars mission. The Mars Orbiter Mission’s spacecraft will be given another earth bound manoeuvre at 0206 hrs. The reason to celebrate: the celebrity spacecraft will be hurled to an apogee of almost one lakh km. This will be the fourth orbit raising manoeuvre since the inter-planetary spacecraft, India’s first, was launched on November 5 from SHAR, Sriharikota, Andhra Pradesh.
The midnight monoeuvres have caught the fascination of space enthusiasts who are tracking every development related to the mars mission that Indian scientists have made possible. They have questions to ask and Isro’s scientists are more than willing to explain why the orbit raising manoeuvres take place only in the nights.

“Firing has to happen near the perigee and in the visibility from ISTRAC ground stations. All these orbits have argument of perigee of ~285 degress. When all these constraints are put together, firings time will almost always fall in to midnights of Indian sub continent,” Isro explained about the reasons for the midnight manoeuvres.

According to Isro scientists, the Liquid Engine On-board MOM has performed cleanly over the last three consecutive nights by gradually raising MOM’s Velocity at perigee and the resultant Apogee altitude as well. “And now MOM is in a large elliptical orbit and will need another thirty hours for firing its liquid engine to gain additional velocity,” they said.

The third orbit raising manoeuvre of Mars Orbiter Mission spacecraft, starting at 02:10:43 hrs on Nov 09, 2013, was successful. The change noticed in the Apogee was from 40,186 km to 71,636km.

The second orbit raising manoeuvre of MOM was at 02:18:51 hrs(IST) on Nov 8, 2013.The change noticed in Apogee was from 28,814km to 40,186km.

The first orbit-raising manoeuvre of India’s Mars Orbiter Mission was performed at 01:17 hrs Indian Standard Time (IST) early on November 07, 2013) when the 440 Newton Liquid Engine of the spacecraft was fired for 416 seconds by commanding it from Spacecraft Control Centre (SCC) at Isro Telemetry, Tracking and Command Network (ISTRAC) at Peenya, Bangalore. With this engine firing, the spacecraft’s Apogee (the farthest point to Earth) was raised to 28,825km.

 

For more : www.worldleaks.com

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Posted on November 11, 2013, in Hot Leaks and tagged , , , . Bookmark the permalink. Leave a comment.

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