NEW DELHI: In its first mission of 2021, the Indian Space Research Organisation (Isro) will launch Brazilian satellite Amazonia-1 as main payload and 20 other satellites from Sriharikota at 10.23 am on February 28. The launch of PSLV-C51 is the first dedicated commercial mission of NewSpace India Ltd (NSIL), a PSU under the Department of Space. The 20 co-passenger satellites include one nano satellite (INS-2TD) from Isro, four commercial satellites booked via recently-formed space facilitator Indian National Space Promotion and Authorisation Centre (IN-SPACe) and 15 satellites commercially arranged by NSIL itself. The four satellites being launched via IN-SPACe are three UNITYsats from a consortium of three Indian academic institutes and one Satish Dhawan satellite from startup Space Kidz India. Space Kidz India said Satish Dhawan satellite, named after former Isro chairman Satish Dhawan, is aimed at studying space radiation and magnetosphere. This will be their second satellite after Kalamsat to be launched by Isro.