undef

s1b-ew-grd-hh-20170618t094615-20170618t094715-006103-00ab84-001_filter

s1b-ew-grd-hv-20170618t094615-20170618t094715-006103-00ab84-002_filter

s1b-ew-grd-hv-20170618t094615-20170618t094715-006103-00ab84-002_winddir

s1b-ew-grd-hh-20170618t094615-20170618t094715-006103-00ab84-001_winddir