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).
Functions tested
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 # (%)
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 |