undef

s1b-iw-grd-hv-20160930t070408-20160930t070427-002295-003e18-002_filter

s1b-iw-grd-hh-20160930t070408-20160930t070427-002295-003e18-001_filter

s1b-iw-grd-hv-20160930t070408-20160930t070427-002295-003e18-002_winddir

s1b-iw-grd-hh-20160930t070408-20160930t070427-002295-003e18-001_winddir