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The metrics in the geographic frame show good recovery of the magnetospheric signal, especially for the order zero coefficients.
From left to right: X, Y and Z components, in geographic frame; at solar minimum (1996, top) and at solar maximum (2001, bottom).
Table 3. Summary of the quality metrics for the Standard Model (Section 3.1) for all model coefficients given in the geographic frame.
The coefficients in the geographic frame make no assumption about orientation of the dipole main field, other than to reject data by geomagnetic latitude.
In the geographic frame, the dominant signal is resolved partly into the order one coefficients and their metrics are correspondingly better.
'GEO ' refers to the Earth-fixed Geographic frame; and 'Reference ' indicates that the TDS-1 reference models were used to subtract the core and lithospheric fields (but the Comprehensive Inversion ionospheric-field model is used in all cases).
Similar(49)
Studies that used larger geographic frames and/or overall traffic in the vicinity of the home or school [ 49- 52] or that used self-report of traffic intensity [ 53] found no association with asthma prevalence.
Samples are drawn from a geographic sampling frame using a two-stage stratified design, and from telephone number or random digit dialling sampling frames using simple random sampling within health regions.
The coefficients produced in Section 2.8 are relative to the Earth-fixed geographic reference frame.
These hourly ROTI maps demonstrate the dynamics of the ionospheric irregularities in a geographic coordinate frame.
In all cases, the Standard Model's coefficients expressed in the geographic reference frame show good agreement in all the metrics.
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