Statistics of ZTD differences (GNSS/InSAR interpolated ZTDs from COSMO-1-calculated ZTDs) when considering different InSAR PSI points sample spacing
| PSI points sample spacing (number of PSI points distributed uniformly) | 4125 | 1064 | 475 | 266 | 130 | 63 |
| Std.dev (ZTD differences) [mm] | 2.1 | 2.1 | 2.1 | 2.2 | 2.4 | 2.4 |
| Bias (ZTD differences) [mm] | <0.1 | 0.1 | 0.1 | 0.1 | 0.2 | <0.1 |