The table below shows some results of the processing. The dataset depicted here is (c) 2018 xxx - courtecy yyy.
|Airborne corrected data
The image on the right displays elevation (height above ground). The elevation varies between about 60m (blue) and 130m (red). It is clear the terrain is relatively accentuated. The physical height of the area was about 1000m above sea level (air pressure about 827 mBar.
|In the potassium images, the effect of the elevation correction becomes very clear. In the left picture, (especially the top-right part), the effect of elevation differences can be seen as alternating colors. This is gone in the pic on the right, which displays the corrected data.
|In the raw uranium image, the effect of radon is clearly seen. The data was taken in 2 days, day 1 extends from the left to the point where the color toggles from red to blue. The 2nd day starts with the blue part. The right image shows the uranium after radon removal. Not much structure is seen in the data.
|The picture here shows the radon concentration. It is clear that the largest part of the "uranium" signal is actually due to radon in the air.
|As with 40K, also for Thorium we see the cancellation of the elevation effect after corrections.
|Same holds for the total counts images. Again, in the uncorreted image a very clear effect of varying elevation is seen, which is solved in the corrected image.