The test to restart the fourth stage of the PSLV rocket will help India in its future launches while attempting to launch multiple satellites in different orbits. Restarting a rocket engine soon after being shut off is a critical technology that must be mastered. Once a rocket engine is activated, a great deal of heat is generated. The trick is to cool it down in space and restart it after a short pause. India has now launched a total of 57 foreign satellites for 20 countries, and Wednesday's launch earned the country 26 million euros.
TeLEOS-1 is Singapore's first commercial earth observation satellite. It was launched into a low Earth orbit for "remote sensing" applications. The satellite was put into a 550-km-high, circular orbit inclined at 15 degrees to the equator. The next three satellite launches using the Indian PSLV rocket will be navigation satellites.