The United States Naval Observatory (USNO) and the National Institute of Standards and Technology (NIST) regularly compare their time scales using GPS common-view measurements from up to 10 GPS satellites. The table shows recent differences between the two time scales, with values ranging from -1 to +17 nanoseconds. The differences appear to be relatively small and stable over the period shown, with most values between -1 and +9 nanoseconds. The table includes an interpolated value marked with an asterisk.
Source: https://www.nist.gov/pml/time-and-frequency-division/time-services/nist-usno/nist-usno-2015-archive
Keywords: precision, measurements, satellites
