Open Access
Table 1
SHARPs magnetic field features: values for these 19 features, as well as estimates of the errors in those calculations, are provided for each magnetogram in the SHARPs database.
| Acronym | Description | Units |
|---|---|---|
| LAT_FWT | Latitude of the flux-weighted center of active pixels | degrees |
| LAT_FWT | Latitude of the flux-weighted center of active pixels | degrees |
| AREA_ACR | Line-of-sight field active pixel area | micro hemispheres |
| USFLUX | Total unsigned flux | Mx |
| MEANGAM | Mean inclination angle, gamma | degrees |
| MEANGBT | Mean value of the total field gradient | G/Mm |
| MEANGBZ | Mean value of the vertical field gradient | G/Mm |
| MEANGBH | Mean value of the horizontal field gradient | G/Mm |
| MEANJZD | Mean vertical current density | mA/m2 |
| TOTUSJZ | Total unsigned vertical current | A |
| MEANALP | Total twist parameter, alpha | 1/Mm |
| MEANJZH | Mean current helicity | G2/m |
| TOTUSJH | Total unsigned current helicity | G2/m |
| ABSNJZH | Absolute value of the net current helicity | G2/m |
| SAVNCPP | Sum of the absolute value of the net currents per polarity | A |
| MEANPOT | Mean photospheric excess magnetic energy density | ergs/cm3 |
| TOTPOT | Total photospheric magnetic energy density | ergs/cm3 |
| MEANSHR | Mean shear angle (measured using Btotal) | degrees |
| SHRGT45 | Percentage of pixels with a mean shear angle greater than 45° | percent |
Abbreviations: Mx: Maxwells, G: Gauss, Mm: megameters, A: Amperes.
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