It is anticipated that this new service will become as basic as the telephone. This data includes orbit information on all satellites in the system. Bandwidth - The range of frequencies in a signal. The standard GPS code also know as the Civilian Code using the L1 frequency. The unmodulated fundamental frequency of a radio transmitter.
Lower values indicate better solutions.
Dilution of Precision occurs in horizontal, vertical, position, geometric, time and relative measurements. Doppler Shift - The apparent change in frequency of a signal due to the relative velocity of transmitters and receivers. Ephemeris - Almanac of satellite positions as a function of time transmitted in the data message. The local solar mean time at the Greenwich Meridian. Ionospheric Refraction - The change in the propagation velocity of a radio signal as it comes in contact with the Ionosphere.