undef

s1b-ew-grd-vh-20190704t023228-20190704t023332-016978-01ff1e-002_filter

s1b-ew-grd-vv-20190704t023228-20190704t023332-016978-01ff1e-001_filter

s1b-ew-grd-vh-20190704t023228-20190704t023332-016978-01ff1e-002_winddir

s1b-ew-grd-vv-20190704t023228-20190704t023332-016978-01ff1e-001_winddir