Scale height ratio plotted against the spectral index of the thick disc measured between LOFAR and VLA S band data. Squares indicate the variance-weighted mean of all strips for each galaxy with the corresponding error bar, while dots show the individual strip measurements (errors omitted for clarity). The black circles indicate the central stip of the galaxy. If northern and southern halo are fittet individually, there are two central strips for the corresponding galaxy and both are indicated in this plot.