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- NTPClockOffset, NTPFreqOffset: These values are computed by the NTP software on the DSM, and written to the NTP "loopstats" file. See http://www.eecis.udel.edu/~mills/ntp/html/monopt.html
for information on the NTP monitoring options. NTP ClockOffset is the estimated offset of the GPS time from the data system time. A negative positive value indicates that the system GPS clock is indicating an earlier showing a later time than the GPS system clock. NTPFreqOffset is the estimated error in the GPS correction applied to the system clock frequency in parts-per-million, a positive value indicates that NTP has determined that the system clock oscillator is slow and the frequency offset is being added to the system clock values. These NTP values have not been recorded consistently since the beginning of the project. Only data from May 3 to August 12, 2010, Oct 14 to November 9, 2010, and April 9, 2011 onward have been archived.
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