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Polar imagery over a given area is much less frequent
than Geostationary imagery. So for standard visible and Infrared, the Geostationary images are used for
sectors. Polar Mapped Mosaic Satellite Composite Images are used for daily snapshots of the entire Northern
Hemisphere, Southern Hemisphere, or a mercator projection view of the Tropics.
Because of the layout of the GOES imagery, the polar DMSP, AMSU and TRMM imagery has been mapped to match
these sectors, allowing the use of some of the same overlay information. At this point in time, only areas
primarily over the ocean have been included.
*NOTE* TRMM imagery is not available north of 35 N due to the orbit of the spacecraft and has not been used
on sectors extending north of 35 degrees North Latitude.
