undef

s1a-iw-grd-hv-20200916t092712-20200916t092738-034382-03ff8d-002_filter

s1a-iw-grd-hh-20200916t092712-20200916t092738-034382-03ff8d-001_filter

s1a-iw-grd-hh-20200916t092712-20200916t092738-034382-03ff8d-001_winddir

s1a-iw-grd-hv-20200916t092712-20200916t092738-034382-03ff8d-002_winddir