I'm working with summer and winter hillshade values that were calculated in ArcGIS9.3 (but I'm now viewing them/working with them in ArcGIS10.2).
Hillshade values were calculated using the hillshade tool with 30m DEMs. Logically, I would assume that if two sample locations had the exact same winter hillshade values, they should also have the exact same summer hillshade values. However, the data doesn't match this thought process.
Can anyone offer a reason/situation where sites may have different summer hillshade values when their winter values are identical?