Validation results ITU-R P.1511-2

This page contains the validation examples for Recommendation ITU-R P.1511-2: Topography for Earth-to-space propagation modelling.

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

Function topographic_altitude

The table below contains the results of testing function topographic_altitude. The test cases were extracted from spreadsheet ITURP1511-2_topographic_altitude.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 topographic_altitude
itur_val = itur.models.itu1511.topographic_altitude(lat=lat, lon=lon)

# Compute error with respect to value in ITU example file
ITU_example_val = 0.05125146  # (km)
error = ITU_example_val - itur_val.value
error_rel = error / ITU_example_val * 100  # (%)
Validation results models.itu1511.topographic_altitude
ITU-Rpy Function lat (°N) lon (°E) ITU Validation (km) ITU-Rpy Result (km) Absolute Error Relative Error
models.itu1511.topographic_altitude 3.133 101.70 0.051251 0.051246 5.67e-06 0.011
models.itu1511.topographic_altitude 22.900 -43.23 0.000000 0.000000 -1.00e-09 0.000
models.itu1511.topographic_altitude 23.000 30.00 0.187594 0.187595 -1.35e-06 -0.001
models.itu1511.topographic_altitude 25.780 -80.22 0.008617 0.008617 4.57e-07 0.005
models.itu1511.topographic_altitude 28.717 77.30 0.209384 0.209383 4.70e-07 0.000
models.itu1511.topographic_altitude 33.940 18.43 0.000000 0.000000 -1.00e-09 0.000
models.itu1511.topographic_altitude 41.900 12.49 0.046123 0.046124 -1.17e-06 -0.003
models.itu1511.topographic_altitude 51.500 -0.14 0.031383 0.031380 2.67e-06 0.009
models.itu1511.topographic_altitude 9.050 38.70 2.539862 2.539859 2.45e-06 0.000