undef

s1a-ew-grd-vh-20180925t212010-20180925t212110-023860-029aa3-002_filter

s1a-ew-grd-vv-20180925t212010-20180925t212110-023860-029aa3-001_filter

s1a-ew-grd-vv-20180925t212010-20180925t212110-023860-029aa3-001_winddir

s1a-ew-grd-vh-20180925t212010-20180925t212110-023860-029aa3-002_winddir