Distance Correction

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Distance Correction

• Markus Liniger

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General Remarks

• Only Swiss rural data
• Study of the influence of No of obstacles
• Bullington became candidate
• Small influence of No of obstacles
• Smallest standard deviation
• Simple correction (10 dB)
• Correction
• 0 for small distances
• About 10 dB for 10 to 160 km
• 40 dB for 100 km

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Mean DifferenceNo Distance Correction
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Standard DeviationNo Distance Correction
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Mean Difference Correction Polynomial 1. degree
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Standard Deviation Correction Polynomial 1.
degree
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Simulation (David Bacon)
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Distance Corrections
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Correction Polynomial 9. degree
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Mean Difference Correction Polynomial 9. degree
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Standard Deviation Correction Polynomial 9.
degree
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Conclusions

• It is possible to add a distance correction
  without increasing the standard deviation
• The presented correction is only a first approach
  and could be improved