undef

s1a-iw-grd-vh-20190827t221901-20190827t221926-028761-0341da-002_filter

s1a-iw-grd-vv-20190827t221901-20190827t221926-028761-0341da-001_filter

s1a-iw-grd-vh-20190827t221901-20190827t221926-028761-0341da-002_winddir

s1a-iw-grd-vv-20190827t221901-20190827t221926-028761-0341da-001_winddir