This code repository contains a MATLAB/Octave software implementation of Recommendation ITU-R P.2001-4 with a general purpose wide-range terrestrial propagation model in the frequency range 30 MHz to 50 GHz.

This version of the code corresponds to the reference version approved by ITU-R Working Party 3M and published on ITU-R SG 3 Software, Data, and Validation Web Page as digital supplement to Recommendation ITU-R P.2001.

The following table describes the structure of the folder ./matlab/ containing the MATLAB/Octave implementation of Recommendation ITU-R P.2001.

This software uses ITU digital products that are integral part of Recommendations. These products must not be reproduced or distributed without explicit written permission from the ITU.

1. Download and extract the required maps to ./private/maps:

   • From ITU-R P.2001-4:
     • DN_Median.txt
     • DN_SubSlope.txt
     • DN_SupSlope.txt
     • dndz_01.txt
     • Esarain_Mt_v5.txt
     • Esarain_Pr6_v5.txt
     • Esarain_Beta_v5.txt
     • FoEs0.1.txt
     • FoEs01.txt
     • FoEs10.txt
     • FoEs50.txt
     • h0.txt
     • surfwv_50_fixed.txt
     • TropoClim.txt

2. Run the script initiate_digital_maps.m

• Ensure all files are placed in ./private/maps before running the script.
• The script processes the maps, which are critical for the software’s functionality.
• The resulting *.m files to for retrieving and interpolating data from from the maps.are placed in the folder ./private.

p2001 = tl_p2001(d, h, z, GHz, Tpc, Phire, Phirn, Phite, Phitn, Hrg, Htg, Grx, Gtx, FlagVP);

The output is a structure with 122 fields (described in detail in tl_p2001.m) containing intermediate and final results, including the following basic transmission losses:

The code was tested and runs on:

• MATLAB versions 2017a and 2020a
• Octave version 6.1.0

• Recommendation ITU-R P.2001

• ITU-R SG 3 Software, Data, and Validation Web Page