BENGALURU, October 18 — The U R Rao Satellite Centre (URSC) of the Indian Space Research Organisation (ISRO) successfully concluded full communication payload integration and space-environment thermal vacuum testing for the first dedicated Indian Data Relay Satellite System (IDRSS-1) on Sunday.
Positioned in geostationary orbit (GEO) approximately 36,000 kilometres above Earth, the satellite functions as a continuous communications conduit for low-Earth orbit (LEO) spacecraft. By establishing continuous inter-satellite links, IDRSS-1 eliminates traditional tracking blackout zones experienced when orbiting spacecraft pass beyond line-of-sight coverage of Indian ground antenna stations.
ISRO engineers confirmed that IDRSS-1 carries steerable S-band and Ka-band transponders capable of relaying real-time vital telemetry, crew biometric data, and high-definition video feeds from the Gaganyaan human crew module directly to the Mission Control Centre (MCC) at SDSC SHAR throughout orbital insertion and atmospheric re-entry phases.
Technical dimensions of the Gaganyaan human spaceflight mission, orbital mechanics distinguishing LEO from Geostationary orbits, frequency allocations across satellite spectrums (S, C, Ku, Ka bands), and the operational capabilities of ISTRAC and the Indian Deep Space Network (IDSN) are staple topics in UPSC GS-III Science and Technology.