undef

s1b-ew-grd-vv-20180725t204505-20180725t204609-011972-016099-001_filter

s1b-ew-grd-vh-20180725t204505-20180725t204609-011972-016099-002_filter

s1b-ew-grd-vv-20180725t204505-20180725t204609-011972-016099-001_winddir

s1b-ew-grd-vh-20180725t204505-20180725t204609-011972-016099-002_winddir