1-Min Rain Rate Statistics Predictions From 1-Hour Rain Rate Statistics Measurements

A new method is presented, which allows the recovery of the cumulative distribution function (CDF) of point rain rate with 1-min integration time (
P
(
R
)
₁
) from rain rate CDFs with longer integration time (in this case, 1-hour time average rain rate statistics
P
(
R
)
₆₀
)- The method generates the scaling factors between
P
(
R
)
₆₀
) and
P
(
R
)
₁
) as a function of the probability level and of the site geographical coordinates. From the scaling factors, a scaling law of the form proposed by Chebil and Raman is devised. The method is applicable worldwide and produces predictions far more accurate than the ones provided by general
P
(
R
) estimation techniques.