I think Corona was old comms network that has been used + shared with bad actors and probably interfaces with the BHO network in NK. Zuma was one of new ones they have deployed to enable the white hats to operate without intel by black ops.
The Corona program was a series of American strategic reconnaissance satellites produced and operated by the Central Intelligence Agency Directorate of Science & Technology with substantial assistance from the U.S. Air Force. The Corona satellites were used for photographic surveillance of the Soviet Union (USSR), the People's Republic of China, and other areas beginning in June 1959 and ending in May 1972. The name of this program is sometimes seen as "CORONA", but its actual name "Corona" was a codeword, not an acronym.
The primary dentist at my office had been an engineer at Corona before deciding to go get his DDS. He has one of the space ridden Corona capsules on shelf behind his bar.