Table 1 Means and RMS errors obtained for the each Swarm satellite and the whole Swarm dataset
From: Bootstrapping Swarm and observatory data to generate candidates for the DGRF and IGRF-13
DGRF parent model | |||||
|---|---|---|---|---|---|
Swarm A | North X | East Y | Vertical Z | Non-polar F | Polar F |
# data | 2,260,317 | 2,260,317 | 2,260,317 | 2,260,317 | 1,345,422 |
Mean (nT) | 0.05 | − 0.53 | − 0.13 | − 0.03 | − 0.10 |
RMS (nT) | 4.06 | 4.00 | 3.14 | 3.28 | 12.17 |
Swarm B | North X | East Y | Vertical Z | Non-polar F | Polar F |
|---|---|---|---|---|---|
# data | 2,214,244 | 2,214,244 | 2,214,244 | 2,214,244 | 1,436,606 |
Mean (nT) | − 0.03 | − 0.34 | 0.16 | 0.01 | 0.17 |
RMS (nT) | 4.13 | 4.24 | 3.01 | 3.19 | 10.95 |
Swarm C | North X | East Y | Vertical Z | Non-polar F | Polar F |
|---|---|---|---|---|---|
# data | 2,229,656 | 2,229,656 | 2,229,656 | 2,229,656 | 1,319,945 |
Mean (nT) | 0.14 | − 0.29 | − 0.14 | 0.00 | 0.10 |
RMS (nT) | 4.10 | 3.99 | 3.16 | 3.33 | 12.24 |
All Swarm | North X | East Y | Vertical Z | Non-polar F | Polar F |
|---|---|---|---|---|---|
# data | 6,704,217 | 6,704,217 | 6,704,217 | 6,704,217 | 4,101,973 |
Mean (nT) | 0.05 | − 0.38 | − 0.03 | 0.00 | 0.10 |
RMS (nT) | 4.09 | 4.07 | 3.10 | 3.26 | 11.78 |
IGRF parent model | |||||
|---|---|---|---|---|---|
Swarm A | North X | East Y | Vertical Z | Non-polar F | Polar F |
# data | 3,657,693 | 3,657,693 | 3,657,693 | 3,657,693 | 2,217,448 |
Mean (nT) | − 0.09 | 0.51 | − 0.27 | − 0.31 | − 0.61 |
RMS (nT) | 4.89 | 3.43 | 3.26 | 3.79 | 13.04 |
Swarm B | North X | East Y | Vertical Z | Non-polar F | Polar F |
|---|---|---|---|---|---|
# data | 3,608,339 | 3,608,339 | 3,608,339 | 3,608,339 | 2,198,427 |
Mean (nT) | 0.16 | 0.14 | − 0.01 | 0.06 | 0.23 |
RMS (nT) | 4.97 | 3.85 | 2.79 | 3.60 | 12.63 |
Swarm C | North X | East Y | Vertical Z | Non-polar F | Polar F |
|---|---|---|---|---|---|
# data | 3,723,674 | 3,723,674 | 3,723,674 | 3,723,674 | 2,234,010 |
Mean (nT) | 0.03 | -0.05 | − 0.36 | − 0.01 | − 0.09 |
RMS (nT) | 4.82 | 3.32 | 3.34 | 3.79 | 12.67 |
All Swarm | North X | East Y | Vertical Z | Non-polar F | Polar F |
|---|---|---|---|---|---|
# data | 10,989,706 | 10,989,706 | 10,989,706 | 10,989,706 | 6,649,885 |
Mean (nT) | 0.03 | 0.20 | − 0.21 | − 0.08 | − 0.15 |
RMS (nT) | 4.89 | 3.53 | 3.13 | 3.72 | 12.78 |