ISRO today successfully launched PSLV-C44 rocket injecting Microsat-R, an imaging satellite and Kalamsat, a communication satellite, into orbit.The rocket was ISROs 46th flight of Polar Satellite Launch Vehicle (PSLV-C44) which took place at 11:37 pm(IST) on Thursday night from the Satish Dhawan Space Centre in Sriharikota.🇮🇳 #ISROMissions 🇮🇳#PSLVC44 3rd stage separated. 4th stage ignited. #Kalamsat#MicrosatR— ISRO (@isro) January 24, 2019× 🇮🇳 #ISROMissions 🇮🇳#PSLVC44 heat shield separated. 2nd stage performance normal. #Kalamsat#MicrosatR— ISRO (@isro) January 24, 2019×Microsat-R is an imaging satellite and Kalamsat is a communication satellite developed by students.🇮🇳 #ISROMissions 🇮🇳Mission Director has authorized automated launch sequence. #PSLVC44 #Kalamsat#MicrosatR— ISRO (@isro) January 24, 2019×The four-stage PSLV with alternating solid and liquid stages has so far launched 53 Indian and 269 satellites of international customers.The PSLV with two strap-on configuration has been identified for this mission with the configuration designated as PSLV-DL.PSLV-C44 is the first mission of PSLV-DL and is a new variant of PSLV.In PSLV-C44, the fourth stage (PS4) of the vehicle will be moved to a higher circular orbit so as to establish an orbital platform for carrying out experiments. Kalamsat, the first to use PS4 as the orbital platform, is a payload contributed by students and Microsat-R is an imaging satellite.In its last mission, on November 29 last year, ISRO had successfully injected Indias earth observation satellite HysIS onboard PSLV C43 into its designated orbit.