CHIME provides accurate measurements while enabling inter-spacecraft calibration in constellation missions, offering a significantly more affordable alternative to traditional magnetometers without compromising measurement quality. The development of CHIME is motivated by the high number of magnetometers needed in spacecraft constellations that require a cost-effective commercial solution, as traditional, precise magnetometers are expensive and require complex ground and on-orbit calibration methods that depend on geomagnetic models or special conditions.
CHIME Accuracy Calibration:
- Various PNI RM3100s were used for data collection, each specified when used and how
- Ground CHIME was used for experiments (50 turns per axis, hand wound)
- Bartington HC1 500 mm Helmholtz coil was used for calibration baseline experiments.
- Python 3.7+
Coil Homogeneity Simulations:
- Python 3.7+
Optimal Calibration Pulse Parameters:
- Python 3.7+
- ESA Swarm Simulation Data 50 Hz: Level 1B MAGx_HR ( https://swarm-diss.eo.esa.int).
- ESA Swarm Simulation Data 1 Hz: Level 1B MAGx_LR.
CHIME Calibration Accuracy Across Orbital Environments:
- Python 3.7+
- ESA Swarm Simulation Data 50 Hz: Level 1B MAGx_HR ( https://swarm-diss.eo.esa.int).
Comparison Simulations of Single Sensor Attitude Indepedent Calibration Methods:
- Python 3.7+
- ESA Swarm Simulation Data 50 Hz: Level 1B MAGx_HR ( https://swarm-diss.eo.esa.int).
Definitions:
CHIME- protagonist of the dataset and accompanying manuscript, the self-calibrating magnetometer
Scale Factor (SF), Non-Orthogonality (NO)- forms of magnetic sensor error
PNI RM3100- internal magnetic sensor in CHIME
Bartington HC1 Coil- calibration tool for the RM3100 and CHIME, a Helmholtz coil itself.
ESA - European Space Agency and Updates:
- March 2025: Changes to simulated calibration methodology, completed before publication initial submission or peer-review
Dorman, C.J., Vata, J., Ojeda, L. V., Moldwin, M.B., The CHIME Magnetometer: A Self-Calibrating Approach for Enhanced Accuracy in Spaceborne Applications, Forthcoming.
Scan of specimen UMMZ:herps:170644 (LERISTA MUELLERI) - Pectoral. Reconstructed Dataset includes 0.013840 TIF images (each 396 x 643 x 1 voxel at 0.013840 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction.
Scan of specimen UMMZ:herps:170644 (LERISTA MUELLERI) - Pelvic. Reconstructed Dataset includes 0.013840 TIF images (each 390 x 800 x 1 voxel at 0.013840 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction.
Scan of specimen ummz:herps:170668 (CALYPTOTIS RUFICAUDA) - Pectoral. Raw Dataset includes 1601 TIF images (each 1392 x 653 x 1 voxel at 0.01374779 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction. and Scan of specimen ummz:herps:170668 (CALYPTOTIS RUFICAUDA) - Pectoral. Reconstructed Dataset includes 0.013748 TIF images (each 1392 x 653 x 1 voxel at 0.013748 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction.
Scan of specimen ummz:herps:170668 (CALYPTOTIS RUFICAUDA) - Pelvic. Raw Dataset includes 1601 TIF images (each 688 x 1283 x 1 voxel at 0.01374779 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction. and Scan of specimen ummz:herps:170668 (CALYPTOTIS RUFICAUDA) - Pelvic. Reconstructed Dataset includes 0.013748 TIF images (each 688 x 1283 x 1 voxel at 0.013748 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction.
Scan of specimen ummz:herps:170712 (HEMIERGIS DECRESIENSIS) - Pectoral. Raw Dataset includes 1601 TIF images (each 613 x 913 x 1 voxel at 0.01387013 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction. and Scan of specimen ummz:herps:170712 (HEMIERGIS DECRESIENSIS) - Pectoral. Reconstructed Dataset includes 0.013870 TIF images (each 613 x 913 x 1 voxel at 0.013870 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction.
Scan of specimen ummz:herps:170712 (HEMIERGIS DECRESIENSIS) - Pelvic. Raw Dataset includes 1601 TIF images (each 1139 x 575 x 1 voxel at 0.01387013 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction. and Scan of specimen ummz:herps:170712 (HEMIERGIS DECRESIENSIS) - Pelvic. Reconstructed Dataset includes 0.013870 TIF images (each 1139 x 575 x 1 voxel at 0.013870 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction.
Scan of specimen UMMZ:herps:200257 (SAIPHOS EQUALIS) - Pectoral. Raw Dataset includes 1601 TIF images (each 1005 x 746 x 1 voxel at 0.01957968 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction. and Scan of specimen UMMZ:herps:200257 (SAIPHOS EQUALIS) - Pectoral. Reconstructed Dataset includes 0.019580 TIF images (each 1005 x 746 x 1 voxel at 0.019580 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction.
Scan of specimen UMMZ:herps:200257 (SAIPHOS EQUALIS) - Pelvic. Raw Dataset includes 1601 TIF images (each 577 x 1212 x 1 voxel at 0.01957968 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction. and Scan of specimen UMMZ:herps:200257 (SAIPHOS EQUALIS) - Pelvic. Reconstructed Dataset includes 0.019580 TIF images (each 577 x 1212 x 1 voxel at 0.019580 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction.
Scan of specimen ummz:herps:203302 (GNYPETOSCINCUS QUEENSLANDIAE) - Pectoral. Raw Dataset includes 1601 TIF images (each 555 x 1095 x 1 voxel at 0.0212064 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction. and Scan of specimen ummz:herps:203302 (GNYPETOSCINCUS QUEENSLANDIAE) - Pectoral. Reconstructed Dataset includes 0.021206 TIF images (each 555 x 1095 x 1 voxel at 0.021206 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction.
