In-Flight Dark Current Nonuniformity Used for Space Environment Model Benchmarking

In-flight dark current nonuniformity measurements performed on three different satellites [JASON-2, SPRINT-A, and SAT-X (name withheld)] are compared to ground calculations. The standard deviation of the DCNU is calculated using both the AP8 and AP9 environment models. These predictions are compared to some calculations made with proton fluxes measured with the Influence sur les Composants Avancés des Radiations de l'Espace-NG spectrometer embedded on the JASON-2 satellite. The reliability of AP8 and AP9 models is analyzed. AP9 model appears to consistently overestimate the in-flight degradation.