Choice of Satellite & Redundancy
It is planned to use linear polarization in the UHF transmitter so that Warning center receives the ATG data as well as DART buoy data transmission through both INSAT 3A and KALPANA satellite simultaneously. 
Choice of Transponder
One-Way Communication: Data Relay Transponder
Two-Way Communication: MSS Transponder
 
INSAT-based Satellite Communication Network