40547 - IRNSS-1D

IRNSS-1D is a satellite in the Indian Regional Navigational Satellite System (IRNSS) constellation. The satellite is the fourth of seven in the constellation, launched after IRNSS-1A, IRNSS-1B and IRNSS-1C. The satellite is the only satellite in the constellation slated to provide navigational services to the region. The satellite is in geosynchronous orbit.

The satellite will help in augmenting the satellite based navigation system of India, which is currently under development. The navigational system will be a regional one targeted towards South Asia. The satellite provides navigation, tracking and mapping services.

The IRNSS-1D satellite has two payloads: a navigation payload and CDMA ranging payload, in addition with a laser retro-reflector. The payload generates navigation signals at L5 and S-band. The design of the payload makes the IRNSS system inter-operable and compatible with Global Positioning System (GPS) and Galileo.

The satellite is powered by two solar arrays, which generate power up to 1,660 watts, and has a lifetime of ten years.

Facts in Brief

Launch Date: 2015-03-28
Launch Vehicle: PSLV-XL
Launch Site: Sriharikota, India