The first orbit-raising manoeuvre of
Chandrayaan-1 spacecraft was performed at 09:00 hrs Indian Standard
Time (IST) this morning (October 23, 2008) when the spacecraft's 440 Newton
Liquid Engine was fired for about 18 minutes by commanding the spacecraft from
Spacecraft Control Centre (SCC) at ISRO Telemetry, Tracking and Command Network
(ISTRAC) at Peenya, Bangalore. With this engine firing, Chandrayaan-1's apogee
has been raised to 37,900 km, while its perigee has been raised a little, to
305 km. In this orbit, Chandrayaan-1 spacecraft takes about 11 hours to go
round the Earth once.
Chandrayaan-1, India's first spacecraft to Moon, was successfully
launched by PSLV-C11 yesterday (October 22, 2008) from Satish Dhawan Space
Centre SHAR, Sriharikota. The launch vehicle placed Chandrayaan-1 in an
elliptical orbit with a perigee (closest point to the earth) of 255 km and
apogee (farthest point to earth) of 22,860 km. In this initial orbit,
Chandrayaan-1 orbited the Earth once in about six and a half hours. Following
its successful launch, the SCC acquired the first signals and conducted
preliminary operations on Chandrayaan-1. The Deep Space Network (DSN) at Bylalu
tracked the spacecraft in this orbit and received signals in S and X band and
has sent commands to the spacecraft.
All systems onboard the spacecraft are
functioning normally. Further orbit raising maneuvers are planned
in the coming few days.