undef

s1b-iw-grd-vv-20180623t215119-20180623t215148-011506-015251-001_filter

s1b-iw-grd-vh-20180623t215119-20180623t215148-011506-015251-002_filter

s1b-iw-grd-vh-20180623t215119-20180623t215148-011506-015251-002_winddir

s1b-iw-grd-vv-20180623t215119-20180623t215148-011506-015251-001_winddir