AAD_PAD_PDV
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This is what ISRO says,
"INDIAN REGIONAL NAVIGATION SATELLITE SYSTEM (IRNSS)
IRNSS constellation consists of seven satellites. Three satellites will be placed in Geostationary orbit (GEO) at 34°E, 83°E & 131.5°E and two satellites each will be placed in the Geosynchronous orbit (GSO) with equatorial crossing at 55°E and 111.5°E with an inclination of 29° to the equator. Two spare satellites are also planned to be realised. IRNSS will have two types of signals, in L5 and S-Band. IRNSS provides two basic services a Standard Positioning Service (SPS) for common civilian users and a Restricted Service (RS) for special authorised users. "