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Q. What types of radio signals are utilized by this monitoring system?

A. Both the STU (satellite transmitter unit) mounted on the magazine or storage facility and the SPOT device emit a simplex (one way) transmission to the communications satellite constellation in the L-Band (1610 to 1621.35 MHz). As well, the signals received from the GPS constellation of satellites are also within the L Band (L1 – 1575.42 MHz)