undef

s1a-iw-grd-vh-20180525t205119-20180525t205144-022066-02628f-002_filter

s1a-iw-grd-vv-20180525t205119-20180525t205144-022066-02628f-001_filter

s1a-iw-grd-vv-20180525t205119-20180525t205144-022066-02628f-001_winddir

s1a-iw-grd-vh-20180525t205119-20180525t205144-022066-02628f-002_winddir