PSLV-C50, which is the 52nd mission of PSLV, will launch CMS-01 from the Second Launch Pad (SLP) of Satish Dhawan Space Centre (SDSC) SHAR, Sriharikota. The launch is tentatively scheduled at 1541 Hrs IST on December 17, 2020 subject to weather conditions.

CMS-01 is a communication satellite envisaged for providing services in Extended-C Band of the frequency spectrum. The Extended-C Band coverage will include Indian mainland, Andaman-Nicobar & Lakshadweep Islands. CMS-01 is the 42nd Communication Satellite of India.

PSLV-C50 is the 22nd flight of PSLV in 'XL' configuration (with 6 strap-on motors). This will be the 77th launch vehicle mission from SDSC SHAR, Sriharikota.

ISRO twitted at 4:02 PM · Dec 17, 2020, "#CMS01 successfully separated from fourth stage of #PSLVC50 and injected into orbit #ISRO"

ISRO twitted at 3:43 PM· Dec 17, 2020, "#PSLVC50 lifts off successfully from Satish Dhawan Space Centre, Sriharikota #ISRO#CMS01"
ISRO twitted at 8:39 AM · Dec 17, 2020, "Filling of fuel and oxidizer for the second stage(PS2) of #PSLVC50 completed. #CMS01

ISRO twitted at 4:46 PM · Dec 16, 2020, "Filling of fuel for the fourth stage(PS4) of #PSLVC50 commenced. #CMS01"

ISRO twitted at 3:19 PM, Dec 16, 2020, "Countdown for the launch of #PSLVC50/#CMS01 mission commenced today at 1441 Hrs (IST) from Satish Dhawan Space Centre (SDSC) SHAR, Sriharikota. Launch is scheduled tomorrow (December 17, 2020) at 1541 Hrs IST."
Source: ISRO