undef

s1b-ew-grd-vv-20180811t052613-20180811t052718-012211-0167f5-001_filter

s1b-ew-grd-vh-20180811t052613-20180811t052718-012211-0167f5-002_filter

s1b-ew-grd-vh-20180811t052613-20180811t052718-012211-0167f5-002_winddir

s1b-ew-grd-vv-20180811t052613-20180811t052718-012211-0167f5-001_winddir