of us are touched by satellite communication in more ways than we
realise. Satellite communication (SATCOM) offers some unique
benefits like, ubiquitous coverage, serving far flung areas,
anywhere connectivity etc. In the past two and a half decades
Indian National Satellite (INSAT) and GSAT systems have
revolutionized the country’s telecommunications, TV broadcasting,
DTH services, business communications, rural area connectivity
etc. The satellite communication technology has matured
substantially over past three decades and is being used on
commercial basis for a large number of applications.
In SATCOM Applications, currently the thrust areas are
satellite based tele-education, tele-medicine, Village Resource
Centres, wide-band services. In near future, Broadband Internet
and similar VSAT applications will be provided using Multi Spot
beam high power, high throughput satellites using Ku/Ka frequency,
Tele-education project is focused on spreading
satellite based distance education to entire country at school,
college and university level. Tele-medicine is providing very
valuable support to rural health services by enabling
Super-Specialty doctor's services to remote areas.
Mobile Satellite Services-MSS in India has been of utmost
importance for national disaster management and for strategic
application needs. One-way text message and position reporting
applications have been operationalized and are being extensively
used. The same system has been upgraded for two-way data
communication as well. High power multi beam S -band satellites
have paved way for miniaturized terminals for popular MSS
SAC has developed different handheld and portable terminals
with Unified IP based Hub to support different S-band
communication services in near future. Satellite based services
like two-way voice & multimedia communication, position reporting
and broadcast to handheld terminals have been successfully
demonstrated. They operationalisation is planned for near future.
In 2008, ISRO had set up a Satcom based broadband Virtual
Private Network (VPN) for disaster management support. The network
is operational in Ext-C band on GSAT-12 satellite.
The present network has nine Primary Nodes supporting up to
2.5 Mbps and 33 User nodes supporting up to 825 Kbps data rates.
It is a Point to Point n/w supporting Video Conference, IP data
communication and telephony(DMS). This network was effectively
utilized during disasters in Uttarakhand and Jammu & Kashmir.