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    Points to note

    Points to note :
    • The satellite image is generated with satellite data from Himawari-8 (H8) of Japan Meteorological Agency (JMA). This type of satellite images is originally developed for observing volcanic ash and has the potential to identify sand and dust as well.
    • This satellite image is intended for reference only. It may not be able to depict less significant sand or dust weather, and areas identified as potential sand or dust on the image do not necessarily have the actual reports of sandstorm/duststorm. It is suggested that the product should be used in conjunction with the weather observation map.
    • The performance of this satellite product depends strongly on the observational conditions, such as the occurrence of water vapour, the characteristics of the underlying surface, etc. Care should be taken in interpreting the satellite images by considering the above factors.
    • Sediments in shallow water and desert areas may also be shown in yellow colours. These yellow areas are usually stationary in positions when observing with images in adjacent time.
    • The time of the satellite image represents the time when satellite data are completely received at the ground reception system. Usually, it will take half to one hour to process the satellite data, generate the product and upload the image to the website.
    • Anyone wishing to further disseminate these satellite images should seek permission from JMA. (Address: Japan Meteorological Agency, 1-3-4 Ote-machi, Chiyoda-ku, Tokyo 100-8122, Japan).
    • Himawari-8 (H8) is geostationary satellites located above the Equator at longitude 140.7oE, and some 35,800 km away from the Earth's surface. As they follow the Earth's rotation closely, they are stationary relative to the Earth's surface (hence the name 'geostationary').

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