Table 9 ZWD formal errors of different observation techniques. Given are the mean formal errors in terms of 1- σ standard deviations as obtained by the different observation techniques in units of millimeters. Both KF and LSM solutions are based on VLBI data. For GPS, the formal errors of the ZTD are given instead. No information on uncertainties is available for the ray tracing data sets
From: Tropospheric delay determination by Kalman filtering VLBI data
Data set | KF | LSM | WVR | GPS |
|---|---|---|---|---|
Onsala, CONT11 | 3.5 | 3.0 | 0.7 | 2.9 |
Tsukuba, CONT11 | 3.7 | 2.5 | 1.4 | 3.3 |
Onsala, CONT14 | 2.2 | 2.8 | 0.8 | 1.5 |