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Many networks have NTP (network time protocol) time servers locked to a GPS signal with claimed accuracy of better than 1 millisecond. NTP seems to be the de facto standard for distributing accurate time to systems accross a network. I would like to see a VI that can use this widely available protocol to set the system time with as much accuracy as possible. TheRT Set Date and Time VI only permits specifying the time down to 1 second.
A forum contributor has provided a VI to read the NTP protocol, but uses the RT Set Date and Time VI to set the RT target system time losing any resolution beyond the second. This VI eliminates the greater precision available using the NTP protocol. The contributed VI also does not implement any of the advanced algorithms to improve the accuracy of using NTP over a network which are described at NTP.org and at links that may be found there.
Very tight synchronization (millisecond or better) of many RT targets is possible when the NTP protocols are fully implemented. I need accurate millisecond resolution on many RT targets over a wide (several thousand square miles) area. These RT targets recieve their data streams via radio telemetry so signal propagation time over the area is essentially zero. Processing of the data relies on the relative accuracy of time-tags generated at multiple sites.