undef

s1a-iw-grd-vh-20191002t080505-20191002t080530-029277-0353a1-002_filter

s1a-iw-grd-vv-20191002t080505-20191002t080530-029277-0353a1-001_filter

s1a-iw-grd-vh-20191002t080505-20191002t080530-029277-0353a1-002_winddir

s1a-iw-grd-vv-20191002t080505-20191002t080530-029277-0353a1-001_winddir