The invention relates to a
system with wide geographical coverage for monitoring positions in real time, comprising position monitoring terminals, a communication
satellite and a position monitoring central
station, wherein the position monitoring terminals comprise a GNSS (global navigation
satellite system) positioning module, a
satellite communication module, a control module and a power supply module respectively; the communication satellite is a
synchronous orbit communication satellite; the position monitoring central
station comprises a heavy
caliber parabolic antenna, a satellite communication
receiver and a
data processing computer; and the position monitoring terminals are used for passing positioning information acquired by the positioning modules back to the monitoring central
station by a satellite link, so that the central station can monitor the positions of the position monitoring terminals in real time. In the
monitoring system, bandwidth resources of one satellite
transponder are utilized, and an FDMA (
frequency division multiple access) way, a CDMA (
code division multiple access) way and a TDMA (
time division multiple access) way are adopted to monitor the positions of the multiple position monitoring terminals in real time. The
system is applied to regions with satellite
signal coverage only without ground communication network coverage particularly. The system has the characteristics of instantaneity, multiple users and wide geographical coverage.