8 - Propagation Models - Irregular Terrain Model P2P implementation integrated with HTZ warfare
There's several criteria in selecting a propation model for modeling Land Mobile Radio Systems including but not limited to:
- Must apply to VHF band
- Must be allowed to be used in a reciprocal manner (downlink and uplink). Several overtly statistical models such as COST-231, Okumura-Hata
are optimized only for downlink (talk out) analysis.
- Must allow the user to implement the TSB-88 interpretation of the NLCD clutter.
Also, while not a requirement, it helps if the user can refer to a government standard for the purposes of justification.
So there is tremendous value if the modeling platform can integrate US government propagation standards.
HTZ warfare includes a comprehensive propagation engine that allows users to compose a mixed deterministic/statistical propagation
method by allowing the user to specify the components of a propagation analysis such as Free Space Loss, Diffraction, Reflection with
statistically derived formulas to model climate attenuation, refraction, availability, fading and analamous propagation such as
troposcatter, ducting and so forth.
HTZ warfare also allows the user to call propagation standards such the Department of Defense's TIREM model or the National Telecommunication and Infomation Administration's (NTIA)
Irregular Terrain Model, also known as the Longley-Rice model. HTZ warfare can pass its cartographic and network parameters to
this external subroutine included in the HTZ warfare package as an external DLL, let that subroutine calculate the propagation and send
the results back to the HTZ warfare interface for display and reporting.