Article Rectification methods comparison for the ASTER GDEM V2 data ...

https://gis.stackexchange.com/questions/115101/how-to-properly-open-an-aster-data

http://www.qgistutorials.com/de/docs/working_with_terrain.html

https://gis.stackexchange.com/questions/77414/atmospheric-corrections-for-landsat-8-oli-using-orfeo-toolbox

http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/fundamentals-of-orthorectifying-a-raster-dataset.htm

http://desktop.arcgis.com/de/arcmap/latest/manage-data/raster-and-images/fundamentals-of-orthorectifying-a-raster-dataset.htm

Dear Mr.Johnson

Thanks for sending links. I will check them and inform you about the results and how they could solve the problems.

Regards