Table 2

Autoscaling results of the oblique ionograms data set of 360 ionograms recorded between September 1, 2016 and September 30, 2016. Accurate cases (ǀMUFOISAMUFOperatorǀ≤0.5 MHz) are a subset of acceptable cases (ǀMUFOISAMUFOperatorǀ≤1.5 MHz).

Scaled by OIASA Discarded by OIASA

No. of cases % No. of cases %
The Operator did not scale the MUF 0 0 9 26.5
The operator scaled the MUF 326 100.0 25 73.5
Total 326 34
  Scaled by OIASA and the operator

No. of cases %
Accurate 173 53.0
Acceptable (including accurate) 288 88.3
Poor 38 11.7
Total 326  –

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