What do you understand by ‘Standard Positioning Systems’ and ‘Precision Positioning Systems’ in the GPS era? Discuss the advantages India perceives from its ambitious IRNSS programme employing just seven satellites.

Positioning services in the GPS era

Global Navigation Satellite Systems broadcast two grades of signal. The Standard Positioning System (SPS) is an open, unencrypted civilian service offering moderate accuracy (typically 10-20 m), used for transport, surveying and consumer devices. The Precision Positioning System (PPS) is an encrypted, restricted service delivering finer accuracy reserved for military and authorised strategic users, protected against spoofing and jamming.

India's IRNSS (NavIC) programme

The Indian Regional Navigation Satellite System, branded NavIC, uses just seven satellites (three geostationary, four geosynchronous) to cover India and a region about 1,500 km beyond its borders, transmitting on L5 and S bands. Its compact, regional design keeps costs low while ensuring assured coverage.

Advantages India perceives

• Strategic autonomy: freedom from foreign systems that may be denied in conflict, as GPS access was during the 1999 Kargil operations.
• Dual service: an open SPS for civilians and an encrypted Restricted Service (PPS equivalent) for the armed forces.
• Economic and developmental use: precision farming, fisheries alerts, disaster warning, fleet and rail tracking, and integration into smartphones.
• Regional leverage: extending navigation services to neighbouring countries.

By fielding an efficient seven-satellite constellation, India secures dependable, sovereign positioning without the expense of a global system, strengthening both security and the digital economy.