undef
s1b-ew-grd-vh-20190426t233327-20190426t233402-015984-01e0b1-002_filter
s1b-ew-grd-vv-20190426t233327-20190426t233402-015984-01e0b1-001_filter
s1b-ew-grd-vv-20190426t233327-20190426t233402-015984-01e0b1-001_winddir
s1b-ew-grd-vh-20190426t233327-20190426t233402-015984-01e0b1-002_winddir