Institute for Telecommunication Sciences
the research laboratory of the National Telecommunications and Information Administration

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TA Services Logon

Access to the TA Services Programs is restricted to customers of NTIA/ITS TA Services. Those who do not have active accounts can see the options available by using USERNAME=Demo. This will allow restricted use of the programs. You will be notified whenever charges will be deducted from your account.


ftp://flattop.its.bldrdoc.gov/    access files that have been placed in the FTP directories.

View Samples of outputs from the various TA Services programs.

If you do not have an account with us, you can apply for one.


Download PC versions of the High Frequency (HF) propagation models ICEPAC, VOACAP, REC533.
Access ITS Propagation Measurement data - UHF/VHF measurements.
Access source code for the Irregular Terrain Model (ITM) (Longley-Rice) .
Access source code for the IF-77 Wave Propagation Model (Gierhart-Johnson) .
Access source code for the GLOBE terrain extraction routines.


For technical information or if you are unwilling to agree to the terms of the CRADA contact Paul McKenna, pmckenna@its.bldrdoc.gov, 303-497-3474.

If you agree to the terms of the Pay-per-Use CRADA, Enter your User Name and Password, and press I AGREE.
Username: Password: I AGREE: