undef

s1b-iw-grd-vv-20180328t062919-20180328t062944-010228-012969-001_filter

s1b-iw-grd-vh-20180328t062919-20180328t062944-010228-012969-002_filter

s1b-iw-grd-vh-20180328t062919-20180328t062944-010228-012969-002_winddir

s1b-iw-grd-vv-20180328t062919-20180328t062944-010228-012969-001_winddir