undef

s1a-ew-grd-hh-20151030t105959-20151030t110059-008381-00bd5e-001_filter

s1a-ew-grd-hv-20151030t105959-20151030t110059-008381-00bd5e-002_filter

s1a-ew-grd-hh-20151030t105959-20151030t110059-008381-00bd5e-001_winddir

s1a-ew-grd-hv-20151030t105959-20151030t110059-008381-00bd5e-002_winddir