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Fig. 3

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Example simulation grid for one of the data frames (tiny blue dots), superimposed on the data frame. In the simulation, first the NIS He flux grid was calculated in the Ulysses inertial frame, then the data pixels were simulated by numerical synthesizing the pixels by sliding the virtual collimator across the data frame in the same way as it was done during the actual observations. The vertical scale is in counts per second.

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