For the ongoing ESA Sentinel-1A satellite calibration in the HOAL new soil moisture sensors were installed additionally between the existing soil net by Mariette Vreugdenhil. A network of in total 20 additional sensors will help evaluating the signals of Sentinel-1A.

A goal of the satellite observations is also to determine vegetation characterisitica, therefore Mariette is also going to do a regular sampling of the vegetation for detecting reference water content amounts. In addition she is measuring the development of the crops in the HOAL fields, where currently rapeseed is in its full bloom.