In Flight Measurements of Radiation Environment on Board the French Satellite JASON-2

Abstract

This paper presents particle flux measurements (protons and electrons) obtained with the ICARE-NG detector on the JASON-2 orbit (1336 km alt., 66 incl.) for the period June 2008-Aug. 2010. At this altitude, the South Atlantic Anomaly is greatly broadened as compared to lower altitudes. Proton flux measurements are made in the range 27.5-290 MeV and electron flux in the range 1.6-3.6 MeV. A great care was taken to assess the influence of the satellite on the particle measurements. Comparison of measurements with the results of the AP8 MIN model are given for protons, taken into account environment anisotropy.

Unfolding JASON-2/ICARE-NG High-Energy Particles Measurements Using a Singular Value Decomposition Approach

“…Special attention was paid to the fact that the detector was placed inside the satellite, behind the honeycomb wall. Thus, a sectoring analysis of the satellite was used in the GEANT-4 calculation of the response function of the detector to particles [11]. Such a refinement in 0018-9499 © 2014 IEEE.…”

“…Thanks to the availability of 128 energy channels in the 3 heads of the ICARE-NG instrument onboard JASON 2 (two of them having also both coincidence and anticoincidence modes) and their corresponding response functions [11], the SVD approach enables strong improvements in restoring accurate energetic fluxes. The data used are described in Section II, then the approach in Section III.…”

Correlation of in-flight displacement damage on the OSL sensor with space environment on-board Jason-2 spacecraft

“…Three telescopes (A, B and C) allow to measure electrons and protons in the energy range 1.6-3.6 MeV and 27.5-292 MeV respectively [6]. The time resolution is 16s.…”

“…A new design was implemented to increase the capabilities of This work was supported by grant n° R-S12/MT-0003-107 which is part of CNES R&T program. S. Bourdarie, D. This new radiation monitor allows to measure proton flux in the range 27.5-292 MeV and electron flux in the range 1.6-3.6 MeV thanks to 3 telescopes [6]. DDD is evaluated using the degradation of a Light Emitting Diode (LED) embedded in an OSL sensor ( [7] to [12]).…”

Radiation Belt Activity Indices and Solar Proton Event Alarm on the CRATERRE project web site

“…It offers access to near real time measurements and historical data, by providing an easy and friendly to use interface, to analyse and visualize measurements, locate in flight anomaly with in situ environment from various sources. After several years, the CRATERRE project has led to significant advances in radiation belts detection and comprehension with in-situ measurement analysis aboard the French Spacecraft JASON-2 [5], physical modeling improvement with for example electron radiation belt data assimilation [6] and specification models development with new models of electron fluxes such as OZONE in the outer zone electron belt [7], model at MEO orbit (MEO V2 [8]), at geostationary orbit (IGE 2006 [9]) and in the slot region [10].…”