GSAT-16 communication spacecraft has been planned for providing continuity of Fixed Satellite Services (FSS) in Normal C, Upper Extended C and Ku-bands of the frequency spectrum.
The communication payloads provide a combination of total 48 transponders across the three frequency bands (24-Normal C, 12-Extended-C and 12 in Ku-band) along with a Ku-band beacon transmitter, which is the highest for an Indian satellite. The spacecraft will be Co-located with GSAT-8 at 55 deg E.
For the first time, the C-band coverage (IMS Coverage) will include Indian main land, Andaman-Nicobar, Lakshadweep, Sri Lanka, Maldives Islands along with the in-between Indian Ocean region. The Ku-band coverage will include Indian main land and Andaman-Nicobar Islands. Again for the first time, the satellite Ku-band antenna will provide a minimum of 25 dB Co-polarization suppression over the 51 dBW EIRP contour of the YAMAL spacecraft. This performance is achieved without sacrificing the performance over the Indian mainland region.
Sufficient redundancy is built into the payload for continuity of service. All components are designed to provide nominal mission operational life of 12 years with a design goal of 15 years.
The spacecraft is configured around a standard I3K bus platform providing 5.5 KW of Electric Power Support (EOL, SS).
This preliminary design review document provides the system design, payload configurations with subsystem design aspects. It also covers in detail the antenna design, coverage, assembly, integration, testing and quality assurance plan.
The communication payload consists of
• Normal C-band : 24 transponders
• Upper Extended C-Band : 12 transponders
• Ku-Band : 12 transponders
• Beacon Transmitter : 01
The C-Band payload will provide minimum 37 dBW EIRP over the coverage with a minimum -4 dB/K G/T for a nominal antenna temperature of 300K.
The Ku-Band payload is estimated to provide minimum 52 dBW EIRP over Indian mainland and minimum 51 dBW EIRP over Andaman & Nicobar Islands. The G/T for Ku-Band payload is estimated to be better than +3 dB/K over mainland and +2 over the islands.