undef

s1a-ew-grd-hv-20181004t154342-20181004t154442-023988-029edc-002_filter

s1a-ew-grd-hh-20181004t154342-20181004t154442-023988-029edc-001_filter

s1a-ew-grd-hv-20181004t154342-20181004t154442-023988-029edc-002_winddir

s1a-ew-grd-hh-20181004t154342-20181004t154442-023988-029edc-001_winddir