Re:India Launches Its Second Navigation Satellite
by swatkat on Saturday April 05, 2014 @04:47PM
(#7538388)
If a launch vehicle can place satellite in a geostationary transfer orbit with calculated apogee of 35, 786 km itself, the the apogee raising operation (i.e. perigee firing) is not required. Satellite can just start firing at apogee to transfrom elliptical orbit to circular orbit.
ISRO's PSLV-XL placed IRNSS-1B at an apogee of 20,630 km. So, ISRO needs to do apogee raising before transforming into circular orbit.
Re:India Launches Its Second Navigation Satellite
by swatkat on Wednesday April 09, 2014 @01:10PM
(#7560646)
ISRO's bigger rocket GSLV Mk2 can launch satellites directly to geostationary transfer orbit (calculated apogee of 35,786 km), so there's no need to do orbit raising manoeuvres.
ISRO's PSLV-XL placed IRNSS-1B at an apogee of 20,630 km. So, ISRO needs to do apogee raising before transforming into circular orbit.