undef

s1a-ew-grd-vv-20190328t011252-20190328t011356-026531-02f917-001_filter

s1a-ew-grd-vh-20190328t011252-20190328t011356-026531-02f917-002_filter

s1a-ew-grd-vh-20190328t011252-20190328t011356-026531-02f917-002_winddir

s1a-ew-grd-vv-20190328t011252-20190328t011356-026531-02f917-001_winddir