The spacecraft would be launched by PSLV-C11 in
a highly elliptical transfer orbit with perigee of
about 240 km and an apogee of about 24,000 km. Later,
the spacecraft would be raised to moon rendezvous orbit
by multiple in-plane perigee maneuvers. These maneuvers
would help to achieve the required 3,86,000 km apogee
of the Lunar Transfer Trajectory (LTT).
After a quick estimate of the achieved LTT a mid-course
correction will be imparted at the earliest opportunity.
The spacecraft coasts for about five and a half
days in this trajectory prior to the lunar encounter.
The major maneuver of the mission, called Lunar
Orbit Insertion (LOI) that leads to lunar capture,
would be carried out at the peri-selene (nearest
point in lunar orbit) leading to successful lunar
capture in a polar, near circular 1000 km-altitude
orbit.
After successful capture and health checks, the
altitude is planned to be lowered through a series
of in-plane corrections to achieve the target altitude
of 100 km circular polar orbit.
