No abstract

No abstract

Analytical and Monte Carlo DCNU prediction methods are compared. The difference is studied according to the different assumptions used for the calculations. The analysis is performed as a function of the incident proton fluence. The convergence of the DCNU toward a Gaussian distribution predicted by the central limit theorem is also investigated. Index terms − Space environment, Displacement damages, DCNU, Image sensors, Monte Carlo. I.

A 3D Monte Carlo model has been used to simulate the Dark Current Non Uniformity of image sensors. The consequences of the border crossing effects on the DCNU have been analyzed through different pixel geometries.

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.