undef

s1a-iw-grd-vh-20190827t095139-20190827t095204-028753-03418d-002_filter

s1a-iw-grd-vv-20190827t095139-20190827t095204-028753-03418d-001_filter

s1a-iw-grd-vv-20190827t095139-20190827t095204-028753-03418d-001_winddir

s1a-iw-grd-vh-20190827t095139-20190827t095204-028753-03418d-002_winddir