Thisprogramincludesof•PrincipleofRadioNavigationCalculation:navigationbaseontrilaterationhasbeeninvestigatedandtheoverdeterminedEq.fornavigationhasbeensolved.•GPSEphemerisData:forGPSnavigation,thepositionofGPSsatelliteisveryimportantsothebyreceivingephemerisdatathepositionofthesate