The virtual height of the F1 layer, h'F1

Unlike the f1 layer critical frequency, the virtual height of the F1 layer was measurable from both data sets around ninety percent of the time. Although this may seem contradictory, this is because the virtual height of any F2 trace is defined as h'F if there is only one F layer visible in the data. The common data were highly correlated and each month gave a gradient between 0.91 and 0.97. When the data from the spring equinox is considered, the gradient is found to be 0.99.


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15/05/97 Chris Davis