Table 3 Content of the calibrated GRACE magnetic data product
Element | Contents | Units |
|---|---|---|
Timestamp | Time of observation | CDF_EPOCH |
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 |
B_CRF | Magnetic field vector in the Common Reference Frame (STR frame) fixed to the spacecraft | nT |
B_NEC_raw | Magnetic field vector in the NEC (North, East, Center) frame | nT |
B_NEC | Magnetic field vector in the NEC (North, East, Center) frame, 11 s robust running average | nT |
F | Magnetic field intensity determined from B_NEC | nT |
B_mod_NEC | Model magnetic field vector in the NEC (North, East, Center) frame based on CHAOS-7 geomagnetic field model | nT |
q_NEC_CRF | Rotation from NEC frame to STR Common Reference Frame (CRF), quaternion (NEC \(\leftarrow \) CRF) | – |
q_error | rss of formal error of quaternions (as given in SCA1B data files) | – |