Global D-Region Absorption Prediction

| North Pole | South Pole |
Conditions in the D-Region of the Ionosphere have a dramatic effect on High Frequency (HF) communications and Low Frequency (LF) navigation systems like Loran. The global D-Region Absorption Product depicts the D-region at high latitudes where it is driven by particles as well as low latitudes, where photons cause the prompt changes. This product merges all latitudes using appropriate displays, and is useful to customers such as commercial aviation and maritime users.
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Documentation DRAP Log Tabular Values Latest X-ray Flux Plot Latest Proton Flux Plot Black Background
