A technique has been developed to quantitatively assess the relative radiometric accuracy of each detector at the
focal plane of a pushbroom hyperspectral sensor. The approach requires only a calibrated radiance data cube as
input. The results are visualized as a 2-D error image, analyzed statistically, and presented graphically as 2-D
probability distribution function plots. We present results comparing the performance of the MaRS, COMPASS,
HYCAS, and SpecTIR sensors. We also describe the algorithm basis, assumptions, and implementation details.