Thisiseducationprogram,whichshowyou,howcalculateyourlocationbyGPS--method.Thismethodisverysimple.Youmusthavedataaboutsatellitesliketherecoordinatesanddistancestothem.Ifyouknowthis,itisverysimpletowritesystemofequations,whichsolutionwillbeyourlocation.