Then we reformatted the into PingER format and made it available via the PingER tools . We scatter plotted the daily Surveyor data versus the daily PingER data to yield the scatter plot below. Again the R 2 indicates a strong correlation. Finally we repeated the above for hourly ticks to yield the results below for a PingER monitor at SLAC monitoring 2 hosts at CERN and vice versa. Summary Surveyor has more detailed measurements of the performance both in the frequency at which the measurements are made and also in the fact that it has one way measurements.
Surveyor relies on dedicated platforms with strong central management.
This enables it to be attractive for sites that have limited bandwdith, or are unwilling to install a dedicated host and GPS aerial. It has also turned out to be attractive to groups such as the XIWT that have limited resources to gather the data and analyze the data.