Left: Average of PSDs for each separation of the high-filtered stellar modulation functions on 1SHORT with R_c = 100. Right: Spatial variations in PSDs for each separation of the high-filtered stellar modulation functions (same as left panel but with standard deviation). The simulated stellar modulation functions M_sim were estimated by injecting a BT-NextGen stellar spectrum at 6000K into MIRISim. The stellar modulation functions at each point are renormalized so as not to have the flux dependency of the PSF (which would otherwise only show a PSD concentrated at ρ ≈ 0). M_data was estimated from HD159222 data. Edge effects, arising from both the detector and the cube reconstruction, begin to manifest at around 2 arcseconds.