The Indian Space Research Organisation(ISRO) launched the Indian Regional Navigation Satellite System-1L, the eighth such satellite to be a part of a constellation. It was launched from the first launch pad at the Satish Dhawan Space Centre in Sriharikota, Andhra Pradesh. IRNSS-1L is expected to replace IRNSS-1A, the first of the seven navigation satellites that were rendered ineffective after its three rubidium atomic clocks failed. The seven satellites are part of the NavIC navigation satellite constellation.