The VIIRS instrument on NASA’s recently-launched NPP satellite began to acquire imagery on 21 November 2011 (NASA news release). True Color Red-Green-Blue (RGB) images from two of the early satellite passes are shown, which cover a swath from Brazil to eastern Canada from 16:10 to 16:35 UTC (above) and another swath covering much of eastern... Read More

1-km resolution GOES-13 0.63 µm visible channel images (above; click image to play animation) revealed a mesoscale vortex (or “mesolow”) propagating slowly westward across the western end of Lake Ontario on 21 November 2011. The GOES-13 satellite had been placed into Rapid Scan Operations (RSO) mode, providing images as frequently as every... Read More