Table 2 GVO model rms misfit statistics between GVO estimates and the contributing data for the global grid of 300 GVOs during CHAMP, CryoSat-2 and Swarm. Here \(\scriptsize \sum\) and \(\Delta\) represent data sums and data differences, respectively, split into the North-South (NS) and East–West (EW) components
From: Applications for CryoSat-2 satellite magnetic data in studies of Earth’s core field variations
Component | CHAMP | CryoSat-2 | Swarm | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
No. | Mean | rms | No. | Mean | rms | No. | Mean | rms | ||
[nT] | [nT] | [nT] | [nT] | [nT] | [nT] | |||||
Polar | 2574 | 2106 | 1872 | |||||||
\(\sum B_{x,NS}\) | \(-0.01\) | 6.61 | 0.01 | 8.21 | 0.02 | 6.39 | ||||
\(\sum B_{y,NS}\) | 0.00 | 6.52 | 0.00 | 8.37 | \(-0.02\) | 7.05 | ||||
\(\sum B_{z,NS}\) | 0.00 | 3.34 | 0.00 | 4.11 | \(-0.03\) | 3.12 | ||||
\(\sum B_{x,EW}\) | 0.04 | 6.06 | ||||||||
\(\sum B_{y,EW}\) | 0.01 | 6.67 | ||||||||
\(\sum B_{z,EW}\) | 0.05 | 2.94 | ||||||||
\(\Delta B_{x,NS}\) | 0.00 | 4.35 | 0.01 | 7.89 | 0.01 | 3.84 | ||||
\(\Delta B_{y,NS}\) | \(-0.01\) | 5.20 | 0.01 | 8.01 | 0.00 | 4.94 | ||||
\(\Delta B_{z,NS}\) | 0.01 | 1.61 | \(-0.00\) | 4.85 | 0.00 | 1.39 | ||||
\(\Delta B_{x,EW}\) | 0.16 | 3.22 | ||||||||
\(\Delta B_{y,EW}\) | 0.08 | 3.43 | ||||||||
\(\Delta B_{z,EW}\) | \(-0.05\) | 0.96 | ||||||||
Non-polar | 7326 | 5994 | 5328 | |||||||
\(\sum B_{x,NS}\) | \(-0.01\) | 1.76 | \(-0.01\) | 3.85 | 0.00 | 1.76 | ||||
\(\sum B_{y,NS}\) | 0.00 | 1.47 | 0.00 | 3.31 | \(-0.01\) | 1.95 | ||||
\(\sum B_{z,NS}\) | 0.00 | 1.33 | 0.00 | 3.08 | \(-0.00\) | 1.08 | ||||
\(\sum B_{x,EW}\) | \(-0.04\) | 1.65 | ||||||||
\(\sum B_{y,EW}\) | 0.02 | 1.66 | ||||||||
\(\sum B_{z,EW}\) | \(-0.02\) | 0.99 | ||||||||
\(\Delta B_{x,NS}\) | \(-0.01\) | 0.50 | \(-0.01\) | 4.78 | 0.00 | 0.27 | ||||
\(\Delta B_{y,NS}\) | 0.00 | 0.58 | 0.01 | 4.36 | 0.00 | 0.38 | ||||
\(\Delta B_{z,NS}\) | 0.00 | 0.53 | 0.00 | 4.73 | 0.00 | 0.28 | ||||
\(\Delta B_{x,EW}\) | 0.12 | 0.52 | ||||||||
\(\Delta B_{y,EW}\) | 0.01 | 1.10 | ||||||||
\(\Delta B_{z,EW}\) | 0.01 | 0.53 | ||||||||