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Validation results ITU-R P.837-7

This page contains the validation examples for Recommendation ITU-R P.837-7: Characteristics of precipitation for propagation modelling.

All test cases were extracted from the ITU Validation examples file (rev 5.1).

Functions tested

Function rainfall_rate

The table below contains the results of testing function rainfall_rate. The test cases were extracted from spreadsheet ITURP837-7_rainfall_rate.csv from the ITU Validation examples file (rev 5.1). In addition to the input-arguments, expected result (ITU Validation), and ITU-Rpy computed result (ITUR-py Result), the absolute and relative errors are shown. Each test case is color-coded depending on the magnitude of the errors (green = pass, errors are negligible, red = fail, relative error is above 0.01%).

In addition, the code snippet below shows an example of how to generate the first row of the results in the table:

import itur

# Define input attributes
lat = 3.133  #  (°N)
lon = 101.7  # (°E)
p = 0.01  # (%)

# Make call to test-function rainfall_rate
itur_val = itur.models.itu837.rainfall_rate(lat=lat, lon=lon, p=p)

# Compute error with respect to value in ITU example file
ITU_example_val = 99.15117186  # (mm/hr)
error = ITU_example_val - itur_val.value
error_rel = error / ITU_example_val * 100  # (%)

Function rainfall_rate

The table below contains the results of testing function rainfall_rate. The test cases were extracted from spreadsheet ITURP837-7_rainfall_rate_R001.csv from the ITU Validation examples file (rev 5.1). In addition to the input-arguments, expected result (ITU Validation), and ITU-Rpy computed result (ITUR-py Result), the absolute and relative errors are shown. Each test case is color-coded depending on the magnitude of the errors (green = pass, errors are negligible, red = fail, relative error is above 0.01%).

In addition, the code snippet below shows an example of how to generate the first row of the results in the table:

import itur

# Define input attributes
lat = 3.133  #  (°N)
lon = 101.7  # (°E)
p = 0.01  # (%)

# Make call to test-function rainfall_rate
itur_val = itur.models.itu837.rainfall_rate(lat=lat, lon=lon, p=p)

# Compute error with respect to value in ITU example file
ITU_example_val = 99.1481136  # (mm/hr)
error = ITU_example_val - itur_val.value
error_rel = error / ITU_example_val * 100  # (%)

Function rainfall_probability

The table below contains the results of testing function rainfall_probability. The test cases were extracted from spreadsheet ITURP837-7_rainfall_rate_probability.csv from the ITU Validation examples file (rev 5.1). In addition to the input-arguments, expected result (ITU Validation), and ITU-Rpy computed result (ITUR-py Result), the absolute and relative errors are shown. Each test case is color-coded depending on the magnitude of the errors (green = pass, errors are negligible, red = fail, relative error is above 0.01%).

In addition, the code snippet below shows an example of how to generate the first row of the results in the table:

import itur

# Define input attributes
lat = 3.133  #  (°N)
lon = 101.7  # (°E)

# Make call to test-function rainfall_probability
itur_val = itur.models.itu837.rainfall_probability(lat=lat, lon=lon)

# Compute error with respect to value in ITU example file
ITU_example_val = 4.53654368  # (%)
error = ITU_example_val - itur_val.value
error_rel = error / ITU_example_val * 100  # (%)