Hi... "strange HOT histo... bla... bla..." error message is cz your composite images have different dimensions (band 1, 2, etc). To resolve:
1. ERDAS viewer: Open all band images
2. Create AOI layer at least on intersection area of band 1 - 7 images
3. Resample each band covered by AOI layer (NN method, ignore zero, let pixel size as an original size, dont forget to add AOI layer)
4. Now u have band 1, 2,... etc with same dimension = AOI dimension
5. Run ATCOR .....
If u are using 1 scene landsat... the error msg is: "array... bla... bla..." probably
To resolve this error.... create 1 scne landsat --> 4 tiles
Cheers...
NL
