Accuracy under GPS
Contents
The accuracy of the individual second marker is, other than with DCF77, the same at every location. It is about ± 1 µsec using standard GPS-receivers and decoding of the time marker. This allows the standard crystals for the free-running characteristics of the clock to be adjusted to ± 0.1 ppm. Also a far better adjustment control of the second marker is possible. Even better free-running characteristics are achieved when oven and temperature stabilised crystals are used, i.e. values between 0.1 and 2.0 ppm.
The time marker of plain GPS position receivers, used for private purposes like sailing, walking etc. is not more accurate than DCF77.
With GPS a high short-term and long-term accuracy is achieved.