Ground Segment Activities
ISTRAC
In Indian space programme, ISRO Telemetry Tracking and Command Network (ISTRAC) plays a key role in providing the ground segment for ISRO's low-earth orbit and interplanetary space missions, Indian regional navigation mission as well as for the launch vehicle missions. In addition to this, it performs design and development of weather radars and offers search and rescue facilities.
ISTRAC has established Spacecraft Control Centres, TTC Ground Station Networks across the globe, Deep Space Network, Ground Segment for Navigation mission, including one-way ranging stations, two-way CDMA ranging stations and a precise timing facility, Space Science Data Centre among other things. In addition, ISTRAC performs host of other activities including design and development of weather Radars in multiple frequencies, Search and Rescue Operations and hub services for Satellite Communication Networks. ISTRAC also provides TTC support for missions of other space agencies. ISTRAC brochure is Here .
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These services are made available through NSIL
MCF
Master Control Facility (MCF) at Hassan in Karnataka and Bhopal in Madhya Pradesh monitors and controls all the Geostationary / Geosynchronous satellites of ISRO, namely, INSAT, GSAT, Kalpana and IRNSS series of satellites. MCF is responsible for Orbit Raising of satellites, In-orbit payload testing, and On-orbit operations all through the life of these satellites. MCF activities include round-the-clock Tracking, Telemetry & Commanding (TT&C) operations, and special operations like Eclipse management, Station-keeping manoeuvres and recovery actions in case of contingencies.
NRSC, NE-SAC offer ground system supports as outlined Here .
SAC
The legendry Ahmedabad earth station (Experimental Satellite Communication Earth Station ESCES) was built in 1966, by late Dr.Vikram A Sarabhai. Presently SAC operates & maintains two earth stations, one at Ahmedabad (AES) and another at Delhi (DES). These earth stations have a SAC-ISRO SATCOM infrastructure resource that provides hub / gateway support to the users.
SAC is developing various communication & Navigation applicationslike MSS services, FSS services, DTH, Disaster management, Railways real time information system (RTIS),Q/V/Ka band experiments etc.Towards this, SAC is designing and developing various types of user terminals and ground systems.India being an important user of satellitebroadband applications, ISRO has launched HTS satellites GSAT-19, GSAT-11 and GSAT 29 and SAC has established HTS gateways which is providing broadband connectivity to the users.
GSAT-29 Ka x Ka and Ku x Ku gateway facility will cater to high data rate requirements of users in North-East (NE) region and Jammu & Kashmir (J&K)
GSAT-11 Ground Segment: Gateway facilities for GSAT-11 are currently operational at all four main sites i.e. Ahmedabad, Delhi, Bangalore & Ranchi
