Table 1 List of the sensitivity tests
Experiment name | Optimization grid | Observation generator resolution | Observational weighting | Prior error covariance |
|---|---|---|---|---|
CTL | Latitude–longitude (1° × 1°) | glevel-6 | Yes | Anisotropic |
NO_ERR | Latitude–longitude (1° × 1°) | glevel-5 | Yes | Anisotropic |
ICO | Icosahedral (~ 223 km) | glevel-6 | Yes | Anisotropic |
NO_WTS | Latitude–longitude (1° × 1°) | glevel-6 | No | Anisotropic |
ISO_ERR | Latitude–longitude (1° × 1°) | glevel-6 | Yes | Gaussian |