The operational Sentinel-3 SR___ROE_AX solutions from the Marine and Land centres are compared here against the combined solution (COMB), which is computed as a weighted mean of several external solutions provided by the CPOD QWG. Orbit comparisons for the operational Sentinel-3 AUX_MOEORB and AUX_POEORB solutions from the CPOD Service are also provided against the same COMB solution.
In the following figures, the position accuracy of each orbit solution is shown (in radial RMS as per requirement). Each figure is presented along with the distribution of the obtained accuracy metrics, where the percentiles of these metrics are calculated for different thresholds.
The period of time for SR___ROE_AX and AUX_MOEORB products correspond to the latest RSR report. The period of time of the AUX_POEORB products includes the whole mission. Orbit comparisons considered as outliers (i.e., those mostly generated from periods of time with manoeuvres or data gaps) have been filtered-out from the statistics shown below.
SR___ROE_AX
Figure 1: Sentinel-3 SR___ROE_AX products – Orbit comparisons against COMB solution [radial RMS; cm] (the accuracy requirement is shown with a blue line; vertical lines indicate periods of manoeuvres or data gaps)
Table 1: Sentinel-3 SR___ROE_AX products – Accuracy percentiles (they are calculated from the orbit comparisons against COMB solution [radial RMS])
| Product Accuracy | ||
| Threshold | Percentage of Fulfilment | |
| Sentinel-3A | Sentinel-3B | |
| 1 cm | 50.79% | 52.56% |
| 2 cm | 92.96% | 92.94% |
| 5 cm | 99.84% | 99.89% |
| 8 cm | 100.00% | 100.00% |
| 10 cm | 100.00% | 100.00% |
AUX_MOEORB
Figure 2: Sentinel-3 AUX_MOEORB products – Orbit comparisons against COMB solution [radial RMS; cm] (the accuracy requirement is shown with a blue line; vertical lines indicate periods of manoeuvres or data gaps)
Table 2: Sentinel-3 AUX_MOEORB products – Accuracy percentiles (they are calculated from the orbit comparisons against COMB solution [radial RMS])
| Product Accuracy | ||
| Threshold | Percentage of Fulfilment | |
| Sentinel-3A | Sentinel-3B | |
| 0.5 cm | 16.42% | 15.79% |
| 1 cm | 100.00% | 100.00% |
| 2 cm | 100.00% | 100.00% |
| 3 cm | 100.00% | 100.00% |
| 4 cm | 100.00% | 100.00% |
AUX_POEORB
Figure 3: Sentinel-3 AUX_POEORB products – Orbit comparisons against COMB solution [radial RMS; cm] (the accuracy requirement is shown with a blue line; neither gaps nor manoeuvres are depicted in this case)
Table 3: Sentinel-3 AUX_POEORB products – Accuracy percentiles (they are calculated from the orbit comparisons against COMB solution [radial RMS])
| Product Accuracy | ||
| Threshold | Percentage of Fulfilment | |
| Sentinel-3A | Sentinel-3B | |
| 0.5 cm | 97.74% | 99.25% |
| 1 cm | 100.00% | 100.00% |
| 2 cm | 100.00% | 100.00% |
| 3 cm | 100.00% | 100.00% |
| 4 cm | 100.00% | 100.00% |