$FREE_SPACE_PATH_LOSS = 92.45+20*log10($PATH_LENGTH)+20*log10($FREQUENCY);

$OUTAGE_FACTOR_H = 0.139735174-0.172*log10($FADE_MARGIN/$PATH_ATTENUATION_H);

$GEOCLIMATIC_CONVERSION_FACTOR = (10.3-5*log10(1-abs(cos($LATITUDE))**0.7)-2.8*log10($PATH_LENGTH)+1.8*log10(abs($INCLINATION)));

$OUTAGE_FACTOR_V = 0.139735174-0.172*log10($FADE_MARGIN/$PATH_ATTENUATION_V);

sub log10 {
  my $n = shift;
  return log($n)/log(10);
}