For both the linear and quadratic offsets, there is frequently double or even quadruple structure apparently due to variations within the array quads. These can be seen more clearly in the images, below. An image of the data in the histogram. The stretch is 0-15K, the range of the corresponding histogram. The images have just been added recently, and masked data are not guaranteed to be excluded.
Colors are in spectral order, with black below blue and white above red.
Differences among the quads is typically obvious, as is structure within the quad, such as vertical striping from odd-even effects, etc. Nominally the ratio of READ2 and READ1 accumulation times, about 26, but some significant variations are present. Fitted slopes of individual pixels in the array, from the histogram above. Slope images are typically spatially fairly smooth, at least on this scale. Stretch is 10. to 35., the range of the histogram.