An Update to MOBE-DIC Using Current Monitor Measurements From Galileo

• Published in: IEEE transactions on nuclear science Vol. 67; no. 1; pp. 181 - 190
• Main Authors: Hands, A. D. P., Evans, H., Ryden, K. A., Sandberg, I., Heynderickx, D., Provatas, G., Aminalragia-Giamini, S., Tsigkanos, A., Papadimitriou, C., Rodgers, D.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.01.2020; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Current measurement; Data models; Datasets; Earth orbits; Electron density; Environmental monitoring; Extraterrestrial measurements; Galileo satellite system (Europe); Global navigation satellite system; Instruments; Internal charging; Measuring instruments; Monitoring; Monitoring instruments; Navigation; Orbits; Satellite constellations; Satellites; Space vehicles; Statistical analysis; Statistics; trapped electron flux; Van Allen belts
• ISSN: 0018-9499; 1558-1578
• DOI: 10.1109/TNS.2019.2944699

We use electron flux derived from the environment monitoring unit "(EMU)-SURF" current monitor on board a Galileo Global Navigation Satellite System (GNSS) constellation satellite to modify and update the model of outer belt electrons for dielectric internal charging (MOBE-DIC). We describe how this data set, together with data from similar current-measuring instruments on Van Allen Probes, Giove-A, and STRV1d, are used to improve and expand the model. We have extended the spatial range to include the inner belt, exploited EMU data to widen the energy range for the electron spectrum, updated the statistical analysis of flux variation using a data set double the size used for the original model, and established a new and independent latitude function that yields improved agreement in medium earth orbit compared to the original model. The model is entirely characterized by a set of equations and parameters that produce fluxes as a function of magnetic coordinates at three distinct statistical levels.