The SAR wind analysis above shows curious banded wind features over central Lake Huron. The bands have a vertical separation of around 10 km and exist just south of essentially calm winds (magenta in the enhancement used). Peak winds within the bands 8-10 m/s, and the (weaker) winds in between... Read More
Sentinel-1A orbits have a repeat cycle of 12 days, and the second observation in April over Samoan waters occurred on 13 April, as shown above (there were SAR winds created in this domain on 1 April as well, here, on a similar weak-wind day). Diagnosed winds are uniformly light (3-7 knots) in... Read More
Sentinel-1A overflew the central Hawai’ian islands near sunset on 10 April 2023, and the SAR data collected are shown above. Data are also available online at this website. The toggles below compare wind speed from that website (04:39:48 and 04:40:19 from south to north) with Normalized Radar Cross Section fields (04:39:48... Read More
Sentinel-1A overflew the western Hawai’ian islands late on 4 April 2023, observing surface winds around the islands of Kaua’i and Ni’ihau. The image above shows the winds overlain on top of a GOES-18 infrared image. A pronounced region of light winds extends downwind of both islands — the region in... Read More
