@article{8853306,

title = {An Update to MOBE-DIC Using Current Monitor Measurements From Galileo},

author = {A D P Hands and K A Ryden and I Sandberg and D Heynderickx and G Provatas and S Aminalragia-Giamini and A Tsigkanos and C Papadimitriou and D Rodgers and H Evans},

doi = {10.1109/TNS.2019.2944699},

issn = {1558-1578},

year  = {2020},

date = {2020-01-01},

journal = {IEEE Transactions on Nuclear Science},

volume = {67},

number = {1},

pages = {181-190},

abstract = {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.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Sandberg2019,

title = {Data Exploitation of New Galileo Environmental Monitoring Units},

author = {I. Sandberg and S. Aminalragia-Giamini and G. Provatas and A. Hands and K. Ryden and D. Heynderickx and A. Tsigkanos and C.Papadimitriou and T. Nagatsuma and H. Evans and D. Rodgers},

doi = {10.1109/TNS.2019.2915686},

issn = {0018-9499},

year  = {2019},

date = {2019-05-08},

journal = { IEEE Transactions on Nuclear Science},

volume = {66},

number = {7},

pages = {1761-1769},

abstract = {The radiation environment of the Galileo spacecraft is severe and poorly characterized. The Galileo orbit takes the spacecraft through the heart of the outer radiation belt, while the low levels of geomagnetic shielding throughout the orbit expose the spacecraft to intermittent intense fluxes of protons during solar energetic particle events. In the Galileo constellation, two environmental monitoring units (EMUs) are currently flying in two different orbital planes. These units monitor the radiation environment and provide critical information related to hazards for the host spacecraft and its payload. In this paper, we present the results from the analysis of the surface charge collecting plates and the proton telescope sensors. The performed numerical calibration of the EMU sensors and the application of novel unfolding and in-flight cross-calibration techniques allow the calculation of high-quality proton and electron differential fluxes. The creation of a high-quality, long-term EMU electron flux data set, is a step forward toward the improved characterization of medium earth orbit (MEO) environment through the update of the existing or the development of new radiation environment models.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}