The "Timing Quality" Tab
The Web UI allows you to see how all of your time sources are behaving compared to each other. This includes offset information, one way delay data, and more.
The plotted sources and quality will vary by deployment. Here is an example:
The "Live Graphs" timing quality screen
The plotted data can be downloaded in CSV format or as raw data. Click either button in the lower right corner of the screen to initiate the downloading process.
The Snapshot view offers not only a means to check the presence of all sources (the illustration below suggests that there is a problem with Source (6), for example), but also provides specific current data for each of the present sources. Note that NTP sources are generally not updated as often as other sources.
Snapshot view of current sources