Nilgiri
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What is a big deal is a Rs. 1,420 Crores floating in space with No practical use in sight.
The main user (of the high precision and restricted signals) will be the Indian military....just like the US military is for the GPS.
If gaining that accuracy for the Indian military is not "practical" for you....then that is your opinion.
I said that till date NO ONE has made IRNSS receivers. Which means it will never be used till someone first builds it and mass produce it and sell it
IRNSS precision receivers will only be made available for the Indian military.
New civilian receiver models may be augmented to receive the unrestricted signals from the IRNSS constellation...on top of what they already receive from GPS, GLONASS, GALILEO etc... but that is up to the manufacturers (to add the relevant modules to the multiplexer + S-band antenna). It was never the objective of the IRNSS to be civilian focused.....that was always just a secondary result of the primary requirement (military need for secure, high precision satellite positioning system especially in time of war). It is the choice of the civilian manufacturers whether IRNSS offers them any extra redundancy in addition to the existing constellations.
Why would any commercial entity do that when its far more cheaper to buy a GPS device ?
Hope this has been answered now. You seem to be truly confused about what IRNSS main objective was.
Even DRDO has not build a receivers which can be used by missiles. Indian Navy has not built receivers which can be used by the Naval ships and Submarines. Nada for IA or IAF.
And you know this how? You think they will be broadcasting development of the military receivers when the constellation is only going to be finished in March 2016?
Read this before you make a further fool of yourself:
IRNSS - Satellite Missions - eoPortal Directory
Forbes India Magazine - ISRO's Very Own GPS is Ready
IRNSS - Navipedia