What is the lineup of electronic reconnaissance satellites in the United States and the former Soviet Union? What is the development trend?

The United States has developed four generations of electronic reconnaissance satellites, and the fourth generation satellites currently in use mainly include Mercury, bugle, Consultant and Three Destinies. Mercury is a quasi-synchronous orbit electronic reconnaissance satellite, mainly used for communication reconnaissance. It can not only intercept the communication of low-power mobile phones, but also collect non-communication electronic signals such as remote control signals and radar signals for missile testing. The "bugle" has absorbed the advanced electronics, antennas and data transmission technologies used in today's military aerospace system. It is equipped with a complex and precise broadband phased array eavesdropping antenna, and the diameter after deployment is about 9 14m. It can monitor thousands of ground signal sources at the same time, including the communication between Russia and the nuclear submarine fleet, and it also carries a high-frequency relay system, which makes the electronic reconnaissance capability of the US military leap to a new level and obtain the reconnaissance capability of approximate continuous signal intelligence, which can play a greater role in seizing information control rights. Consultant, like bugle and mercury, is also a quasi-synchronous orbit satellite used for communication reconnaissance. "Three Destinies" is a low-orbit electronic reconnaissance satellite, which is used to detect the radio signals of radar and other electronic equipment. When working, three satellites are used as a group, and the distance between satellites in the group is about 50 kilometers, so that four groups can be used to complete continuous global monitoring. The United States is still using the third generation electronic reconnaissance satellite called Orion, which is used to intercept the communication signals of Asian countries for 24 hours and obtain political and military information. Its data may be more valuable than reconnaissance photos.

Compared with the United States, Russia's electronic reconnaissance satellites are declining. Due to the economic recession and rocket failure, its electronic reconnaissance satellite Virgin -2 was only launched in 1998 and 2000, and could not form a constellation. Its "Electronic Intelligence Marine Reconnaissance Satellite" (EO-RSAT) plan has also been affected by the reduction of military space program.