Fig. 1
From: Tropospheric delay determination by Kalman filtering VLBI data
Clock ASD for CONT14 from KF. Clock offset ASD values for time intervals between a few minutes and 6 h are shown logarithmically, based on a KF solution of CONT14. The individual values (see text) are represented as thin black lines, and the average is shown in red. Additionally, the plot includes a linear fit without constraints (blue) and one assuming a random walk process (green). The value k represents the slope of the ASD in this log-log plot. The cyan curve corresponds to a theoretical clock model consisting of a random walk and an integrated random walk process. The vertical dark grey line marks 50 min