ISRO to launch two British satellites on Sunday

The Indian Space Research Organisation (ISRO) is set to launch two small earth observation satellites for the United Kingdom on Sunday. NovaSar and S1-4, weighing a total of 889 kg, will be set off from the first launch pad at Satish Dhawan Centre, Sriharikota at 10:00 pm into a 583-km sun-synchronous orbit. A satellite is said to be in a sun-synchronous orbit when it changes its orientation throughout the year to ensure that the angle of sunlight is the same every time it passes over a particular geographical area on the surface of the earth.