Sriharikota (Andhra Pradesh), Aug 31 The Indian navigation satellite launched here on Thursday was declared a failure. Indian Space Research Organisation (ISRO) Chairman A.S. Kiran Kumar said: "The mission was unsuccessful." He added: "The rocket heat shield didn't separate. The satellite is inside the heat shield." The IRNSS-1H satellite was to have been slung into orbit at around 507 km above the earth.