undef

s1a-iw-grd-vh-20190902t231101-20190902t231126-028849-0344e3-002_filter

s1a-iw-grd-vv-20190902t231101-20190902t231126-028849-0344e3-001_filter

s1a-iw-grd-vh-20190902t231101-20190902t231126-028849-0344e3-002_winddir

s1a-iw-grd-vv-20190902t231101-20190902t231126-028849-0344e3-001_winddir