India's multi-wavelength space based observatory ASTROSAT has completed more than 100 days in orbit. It was launched in September last year and has experiments covering the UV and X-ray wavebands to conduct observations in the area of astronomy. <br/><br/>A release posted in the the Indian Space Research Organisation (ISRO) website said the Performance Verification (PV) phase of ASTROSAT was now half way through. The ASTROSAT, with all its five payloads of astronomy, was unique and the operational procedures enhanced to suit the payload requirements unlike the earlier remote sensing or communication missions of ISRO.