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.
