ScannerFood Frequency Browser	INDEX >Wireless Devices >>GPS		Global Positoning System GPS 1.17-1.84 GHz
Channel Frequency Use       CH 1 1575.420 MHz L1 - Navigation, Acquisition, Precision Y       CH 2 1227.600 MHz L2 - Precision Y       CH 3 1381.050 MHz L3 - Nuclear Detonation Detection System Payload       CH 4 1841.400 MHz L4 - Currently studied for affects of ionospheric correction       CH 5 1176.450 MHz L5 - Proposed civilian "safety of life" use