undef
s1a-ew-grd-vv-20181009t143010-20181009t143110-024060-02a122-001_filter
s1a-ew-grd-vh-20181009t143010-20181009t143110-024060-02a122-002_filter
s1a-ew-grd-vv-20181009t143010-20181009t143110-024060-02a122-001_winddir
s1a-ew-grd-vh-20181009t143010-20181009t143110-024060-02a122-002_winddir