Short product names


Full product name
Auroral electrojets line profile - Line current method (LC)


This product contains characterization of the electrojet sheet current density as well as the total horizontal sheet and associated large-scale field-aligned current density along the Swarm orbit ionospheric footprints at auroral latitudes (by using LC method).

Output variables

t Time of observation, UTC1CDF_EPOCH
LatitudedegPosition in ITRF - Geocentric latitude1CDF_DOUBLE
LongitudedegPosition in ITRF - Geocentric longitude1CDF_DOUBLE
Latitude_QDdegQuasi-dipole latitude1CDF_DOUBLE
Longitude_QDdegQuasi-dipole longitude1CDF_DOUBLE
MLThourMagnetic Local Time (QD)1CDF_DOUBLE
JA/kmNorth and East component of horizontal sheet current density vector in geocentric frame2CDF_DOUBLE
J_QDA/kmEast component of horizontal sheet current density in QD frame1CDF_DOUBLE
t_qual Time instants of quality information (RMS_misfit and Confidence), UTC1CDF_EPOCH
RMS_misfitnTRoot Mean Square error misfit between observations and model values for the oval crossings31CDF_DOUBLE
Confidence-Goodness of fit computed as 1 - (residual rms / signal rms) for the oval crossings31CDF_DOUBLE


Product identifier AEJxLPL_2F
Definition Latitude profiles of high-latitude ionospheric horizontal sheet current densities using the Line Current method
Input Data MAGx_LR_1B, Latest CHAOS model1 including, core, lithosphere, magnetosphere and secondary currents.
Input Time Span 24 h
Spatial representation One geographic and quasi-dipole latitude/longitude pair for each output value. Longi-tudes and latitudes of nearest magnetic-field measurement. Given at Swarm footprints (at 110 km altitude) according to the time representation of this product2. The footprints have been determined with radial mapping.
Time representation 1 deg latitude corresponding to ~ 15 s
Units A/km
Resolution Full resolution (Double precision)
Uncertainty c.f. Olsen, N, Geophys. Res. Lett., 23, 3635-3638 and Aakjaer, C. D. et al., doi:10.1186/s40623-016-0509-y
Quality indicator RMS characterizing the misfit between modelled and measured magnetic field by Swarm
Data volume ~250 kB
Data format CDF
Output time span 24 h2
Update rate Daily
Latency < 1 day
Notes 1 Version information of Input Data are available in the CDF global attributes.
2 Product always contain data from the start of the first oval crossing of the day until the end of the last oval crossing starting that day, i.e. may contain data from the next day if oval crossing occurs around midnight.
3 In Line Current method the equatorward boundary of oval crossing is always at +/- 50 QD latitude and the poleward boundary is at the most poleward point in QD latitude of the satellite trajectory.