undef

s1a-ew-grd-vv-20190308t142538-20190308t142620-026247-02eea4-001_filter

s1a-ew-grd-vh-20190308t142538-20190308t142620-026247-02eea4-002_filter

s1a-ew-grd-vv-20190308t142538-20190308t142620-026247-02eea4-001_winddir

s1a-ew-grd-vh-20190308t142538-20190308t142620-026247-02eea4-002_winddir