The Indian Space Research Organization ISRO has made a successful innovation experiment during the PSLV-C29 launch yesterday. It was to test its ability to launch multiple payloads in vastly different altitudes using a single flight of the rocket in future. <br/><br/>The ISRO sources said the fourth and last fuel stage of the PSLV's ignition was as usual cut off after reaching the required altitude of 550 kilometer and then the separation of satellites from its decks started. The operation got over within 21 minutes from the time of its take off.<br/><br/>Normally the mission gets ended with the last payload's separation. But this time, the scientists made the fourth fuel stage to coast further for over 45 minutes and 25 seconds on its own. And then the fuel stage was made to restart mid space by firing it for four seconds.<br/><br/> ISRO chairman AS Kirankumar in his congratulatory remarks at the Satish Dhawan Space Centre Mission Control Room announced that the new experiment was successful. This is expected to help ISRO in future to send multiple satellites in distinctly different altitudes in a single launch, after many more similar trials.