Figure 8

Mean and root mean square of the residuals between parent model and input observatory data. Values for each magnetic component are calculated within successive 30-day periods. Periods with fewer than 10% of mean number of data per period (approximatey 150 for X, Y, and Z, and approximatey 100 for F) are not plotted to preserve statistical robustness. Vector data are all within ±50° geomagnetic dipole latitude and all (pseudo-) scalar data are outside this range.