Research Article
Error Modeling and Analysis for InSAR Spatial Baseline Determination of Satellite Formation Flying
Table 2
Error accuracies and modeling descriptions in simulations.
| Error type | Error accuracy | Modeling description |
| GPS code measurement noise | 0.5 m (1σ) | Gaussian white noise model with mean value of 0 m and standard deviation of 0.5 m | GPS carrier phase measurement noise | 0.002 m (1σ) | AR(2) model with mean value of 0 m and standard deviation of 0.002 m | Ground calibration error of GPS receiver antenna phase center | — | ARP data, PCO data, and PCVs data (mean value data and RMS data) of SEN67-1575-14+CRG | Attitude measurement error | Fixed bias of 0.005° in the yaw, pitch, and roll components plus a 0.003° (1σ) random error | Gaussian white noise model with mean value of 0.005° and standard deviation of 0.003° in the yaw, pitch, and roll components | Fixing error of GPS receiver antenna | 0.5 mm (3σ) | A fixed vector with direction randomly drawn in unit ball and magnitude of 0.5 mm in each satellite body coordinate system | Consistency error of SAR antenna phase center | 0.25 mm (3σ) | A fixed vector with direction randomly drawn in unit ball and magnitude of 0.25 mm in body coordinate system of Satellite 1 |
|
|