undef

s1a-ew-grd-vh-20180818t150504-20180818t150604-023302-0288c3-002_filter

s1a-ew-grd-vv-20180818t150504-20180818t150604-023302-0288c3-001_filter

s1a-ew-grd-vv-20180818t150504-20180818t150604-023302-0288c3-001_winddir

s1a-ew-grd-vh-20180818t150504-20180818t150604-023302-0288c3-002_winddir