CASSIOPE SPACECRAFT (Swarm-E)
PROCESSED DATA HANDBOOK
MGF lv1b LR CDF Product
The MGF lv1b LR CDF Product is a daily product, providing MGF magnetic field data and associated parameters at 1 Hz.
Reference documents:
Swarm-Echo MGF lv1b Data Product Description
Swarm-Echo MGF lv1b Data Calibration Validation Report
Swarm-Echo MGF lv1b Release Notes
The Common Data Format (CDF) file is written to the International Solar-Terrestrial Physics (ISTP) standard. The CDF file contains the following fields:
| Attribute | Definition |
| CalInboard | Inboard sensor 3×4 calibration matrix |
| CalOutboard | Outboard sensor 3×4 calibration matrix |
| Timestamp | Time of observation (UTC, represented as CDF epoch in milliseconds since year zero) |
| SyncStatus | Time synchronization status, source and quality |
| Latitude | CASSIOPE position in ITRF – Geocentric latitude (deg) |
| Longitude | CASSIOPE position in ITRF – Geocentric longitude (deg) |
| Radius | CASSIOPE position in ITRF – Geocentric Radius (m) |
| B_inboard_CRF | Inboard sensor magnetic field vector, CRF (spacecraft) frame (nT) |
| label_B_inbrd | Component label inboard CRF |
| B_outboard_CRF | Outboard sensor magnetic field vector, CRF (spacecraft) frame (nT) |
| label_B_outbrd | Component label outboard CRF |
| B_CRF | Magnetic field vector, CRF (spacecraft) frame (nT), ignore if q_Flags >= 128 |
| label_B_CRF | Component label CRF |
| B_NEC_Out | Magnetic field vector, NEC frame (nT), NaN if Flags_B >= 128 |
| label_B_NEC | Component label NEC |
| B_model_NEC | CHAOS Model magnetic field vector, NEC frame (nT) |
| label_model | Component label NEC |
| dB_other | Magnetic stray field correction vector of all sources, CRF (spacecraft) frame (nT) |
| B_error_In | B component error estimates for Inboard sensor, CRF frame (nT) |
| label_B_err_In | Component label CRF |
| B_error_Out | B component error estimates for outboard sensor, CRF frame (nT) |
| label_B_err_Out | Component label CRF |
| q_NEC_CRF | Quaternion transformation: NEC <– CRF, scalar last |
| Att_error | Error estimates on attitude information (mdeg) |
| Flags_B | Bit flags for measurement issues: 0 = no flagged issues 4 = clipped measurement replaced with interpolated value 64 = padding around active magnetotorquer times 128 = torquer command active |
| Flags_q | Bit flags for attitude information: 0 = no flagged issues 1 = padding around rotations above 0.030 deg/sec 2 = spacecraft rotating more than 0.030 deg/sec 16 = padding for missing definitive attitude 32 = missing definitive attitude solution |
| Flags_Platform | Error flags for Spacecraft platform 0 = no issues |