Real-time Ionospheric High Frequency (HF) Vertical Signal Loss Calculated from the AbbyNormal model

These plots are using NOAA-SEC GOES X-ray 5 minute averaged real-time data, as well as NOAA-SEC F10.7 and kp solar index values.

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Image features: : Each global plot shows the calculated total HF signal loss in decibels as a function of geographic longitude and latitude on a map of the continents. The dB loss is the integrated for the vertical transit. Shown is the variation in the signal loss as a function of frequency, for 2.5 MHz, 5 MHz, 10 MHz and 20 MHz.

Frequency of 2.5 MHz
2.5 MHz Absorption

Frequency of 5 MHz
5.0 MHz Absorption

Frequency of 10 MHz
10.0 MHz Absorption

Frequency of 20 MHz
20.0 MHz Absorption

Model: AbbyNormal by Vince Eccles, Space Environment Corporation

Relevant Publications:
Eccles, J. V., R. D. Hunsucker, D. Rice, and J. J. Sojka, Space weather effects on midlatitude HF propagation paths: observations and a data-driven D-region model, Space Weather, 3, S01002, doi:10.1029/2004SW000094, 2005

Curator:
Authorizing NASA Official: