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Table 2. List of problems reported by the processing Flag ‘Flags’.

From: Determining field-aligned currents with the Swarm constellation mission

Digit-Nr. Value Meaning of digit Flags > 0
1 0/N Data gap < 5 sec; data were interpolated linearly;
2 0/N Data is in filter tuning range due to larger data gap before and/or after the gap (gap > 5 sec); 0 for single-satellite processing (no filter employed).
3 0/N no EST (external part of DST; Maus and Weidelt, 2004) data were available because no DST was available for magnetospheric field calculation; instead default value was used.
4 0/N no IST (internal part of DST; Maus and Weidelt, 2004) data were available because no DST was available for magnetospheric field calculation; instead default value was used.
5 0/N no Em (merging electric field; Kan and Lee, 1979) data was available because solar wind data were not available for magnetospheric field calculation; instead default value was used.
6 0/N no interplanetary magnetic field, IMF, was available for magnetospheric field calculation; instead default value was used.
7 0/N no solar flux parameter, F10.7, was available for magnetospheric field calculation; instead default value was used.
8 0/N No magnetospheric field coefficients were available; magnetospheric field is set to 0; resulting FACs are slightly less reliable.
9 0/1 IRC = NaN and FAC = NaN because latitude ǀθǀ > 86° near geogr. pole
10 0/1 FAC = NaN because inclination ǀIǀ < 30° nearmagn. Equator