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Table 2. Content of Swarm Level-1b Product MAGx_LR.

From: The Swarm Satellite Constellation Application and Research Facility (SCARF) and Swarm data products

Element Contents Units
Timestamp Time of observation CDF_EPOCH
SyncStatus Time reference information
Latitude Latitude of observation in the International Terrestrial Reference Frame (ITRF) degree
Longitude Longitude of observation in the ITRF degree
Radius Radius of observation in ITRF m
F Magnetic field intensity nT
dF_AOCS Magnetic stray field correction intensity related to attitude control magneto-torquers nT
dF_other Magnetic stray field correction intensity of all other sources nT
F_error Error estimate on magnetic field intensity nT
B_VFM Magnetic field vector in the instrument frame of the VFM magnetometer nT
B_NEC Magnetic field vector in the NEC (North, East, Center) frame nT
dB_AOCS Magnetic stray field correction vector related to attitude control magneto-torquers (in VFM frame) nT
dB_other Magnetic stray field correction vector of all other sources (in VFM frame) nT
B_error Error estimates on magnetic field vector BVFM (in VFM frame) nT
q_NEC CRF Rotation from NEC frame to STR Common Reference Frame (CRF), quaternion (NEC ← CRF)
Att_error Error estimate on attitude information degree/103
Flags_F Flags characterizing the magnetic field intensity measurement: spikes or gap in data, discrepancy between ASM and VFM, etc.
Flags_B Flags characterizing the magnetic field vector measurement BVFM and BNEC: spikes or gap in data, discrepancy between ASM and VFM, etc.
Flags_q Flags characterizing the attitude information: identification of active heads, blinding, etc.
Flags_Platform Flags characterizing the spacecraft platform information: thruster activation, lack of telemetry, etc.
ASM Freq_Dev ASM reference frequency calibration data deviation for ASM stability assessment Hz1/2