Building accurate NTP stratum 0 GPS time source is somewhat nontrivial endeavour. Which explains why most of stratum 1 NTP timeservers (typically GPS based) giv

Building accurate NTP stratum 0 GPS time source is somewhat nontrivial endeavour. Which explains why most of stratum 1 NTP timeservers (typically GPS based) give wrong time (with error on the order of 500ms).