However, the scenes were resampled to 30 m pixels and processed through the USGS processing system to generate standard L1T products. Also, during these collections, L8 was flying approximately 40 km to the east of the WRS2 path. To account for the sun angle difference between pixels within an image, a “per pixel sun angle” was used during reflectance calculations over the ROIs of both L7 and L8 images. No BRDF correction was applied under the expectation that differences due BRDF effect should be very minimal as the scenes were acquired within 4 minutes. The statistics over each ROI were generated both in radiance and reflectance space using the L7 and L8 Image Assessment Systems (IAS).