CDC.NET is ComNav's server-side CORS software for managing large, multi-station regional GNSS reference networks. It ingests raw observation data from all connected base stations, models regional atmospheric and orbital errors, and streams optimized single-base, RTD, or network RTK corrections to rover users. Built on a distributed AMQP architecture supporting BDS, GPS, GLONASS and Galileo, it delivers roughly 2cm horizontal / 3cm vertical accuracy over baselines up to about 80km.