Handle IndexError during WV first guess retrieval.
This provides a workaround for EnMAP/GFZ_Tools_EnMAP_BOX/EnPT#92.
Signed-off-by: Daniel Scheffler danschef@gfz-potsdam.de
This provides a workaround for EnMAP/GFZ_Tools_EnMAP_BOX/EnPT#92.
Signed-off-by: Daniel Scheffler danschef@gfz-potsdam.de