An ISRO-Industry Meet on Satellite Navigation was organised at ISRO Satellite
Centre, Bangalore, today, (July 4, 2006). The meet, inaugurated by Mr G
Madhavan Nair, Chairman, ISRO, covered topics on Indian Satellite Navigation
programme, applications and opportunities, research, manufacturing and software
Position, Navigation and Timing (PNT) is an important service available through
the navigation satellites today. Small hand-held receivers are used to
determine the user position anywhere in the world. Location based service will
become as ubiquitous as a mobile phone very soon.
Satellite based PNT service is of vital importance to economies and societies.
It is emerging as an important space application area not only for civil
aviation but in many other areas such as mobile telephones, surface transport,
intelligent highway system, maritime transport, rail, oil and gas, precision
agriculture, fisheries, survey and marine engineering, science, electricity
networks and leisure. It is one of the main components of satellite based
Communication, Navigation and Surveillance (CNS)/Air Traffic Management (ATM)
system adopted by the International Civil Aviation Organisation (ICAO) for
world-wide implementation. It will facilitate seamless navigation across
geographical boundaries and would eventually replace different types of
ground-based navigation systems providing services over different air spaces.
The Department of Space (DOS) is the nodal agency for all matters connected with
satellite navigation. ISRO/DOS has identified Satellite Navigation as an
important thrust area and a large investment in this programme is slated for
the 11th Five Year Plan.
ISRO and AAI are implementing a satellite based navigation system over the
Indian air-space for civil aviation called GAGAN, which consists of a
space-segment and a ground segment. The space segment is a dual frequency (L1
& L5) GPS compatible payload on GSAT-4 under the Technology Demonstration
System (TDS) Phase. The ground segment consisting of 8 Indian Reference
Stations (INRESs), one Indian Master Control Centre (INMCC), one Indian Land
Uplink Station (INLUS) and associated navigation software and communication
links has been installed and a Preliminary System Acceptance Test (PSAT) has
been just concluded. The position accuracies available are good.
The Government has also approved a project recently to implement an Indian
Regional Navigation system (IRNSS) over India in the next 5-6 years. It will
consist of a constellation of 7 satellites and a large ground segment. The
entire IRNSS system will be under Indian control. The space segment, ground
segment and user receivers will be built in India.
In this programme, which is extremely challenging technologically, India will
take a major step towards providing an infrastructure for provision of PNT
services through out India and the neighboring areas. The technological