Abstract: A system is provided for monitoring containers buried in an enclosed area using battery-less GPS receivers. In one embodiment, an inventive system includes a GPS satellite, wherein the GPS satellite send GPS signals to the GPS receivers; a communication satellite; a monitored container that is buried in the enclosed area; a control system that serves as a monitoring system of the enclosed area; and a battery-less GPS receiver equipped with a solar panel that serves as a source for providing energy and equipped with a transmitter configured to send the satellite signals to the communication satellite.