Specifics of GPS 10.23 MHZ is fundamental frequency in GPS All radiofrequencies and codes generated from the same 10.23MHz crystal whose long term stability is controlled by Cesium or Rubidium clock(older satellites) The following graphics show schematically the construction of the GPS signal 02/27/02 12.540Lec0702/27/02 12.540 Lec 07 5 Specifics of GPS • 10.23 MHz is fundamental frequency in GPS • All radiofrequencies and codes generated from the same 10.23MHz crystal whose long term stability is controlled by Cesium or Rubidium clock (older satellites) • The following graphics show schematically the construction of the GPS signal