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RGB dust product from Himawari-8 and GOES-16

by Enric Terradellas last modified Jan 18, 2018 12:10

The EUMETSAT dust product is RGB composite based upon infrared channels of SEVIRI, the radiometer onboard Meteosat Second Generation (MSG) satelites. The product is designed to monitor the evolution of dust storms over deserts during both day and night. The combination does allow however the further (24 hour) tracking of dust clouds as they spread over the sea. The RGB combination exploits the difference in emissivity of dust and desert surfaces. In addition, during daytime, it exploits the temperature difference between the hot desert surface and the cooler dust cloud. The RGB composite is produced using the following MSG IR channels: IR12.0-IR10.8 (on red), IR10.8-IR8.7 (on green); and IR10.8 (on blue). Dust appears pink or magenta in this RGB combination. Dry land looks from pale blue (daytime) to pale green (nighttime). Thick, high-level clouds have red-brown tones and thin high-level clouds appear very dark (nearly black). Emissions and subsequent transport of individual dust events can be very well observed and followed in the RGB composite pictures.

EUMETSAT generates the dust product from images captured by two MSG units centered at 0 and 41.5º East. The SDS-WAS Regional Center provides near-real-time access to these products as well as on-line access to archive.

Similar products are generated from imagery captured by Himawari-8 and GOES-16. Himawari 8 is the 8th of the Himawari geostationary weather satellites operated by the Japan Meteorological Agency. It entered operational service in July 2015. The primary instrument aboard Himawari 8, the Advanced Himawari Imager, is a 16-channel multispectral imager to capture visible and infrared images of the Asia-Pacific region. The satellite is located at 140º East. GOES-16 is the first of the GOES-R series of Geostationary Operational Environmental Satellite (GOES) operated by the U.S. National Oceanic and Atmospheric Administration. It provides atmospheric and surface measurements of America and the Atlantic Ocean (it is located at 75º West). Its main atmospheric instrument is the Advanced Baseline Imager (ABI) with 16 visible and infrared bands.

The RGB products from Himawari-8 and GOES-16 are available at the SLIDER webpage of the Colorado State University.

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