Cloud RF is the work of Alex Farrant, a UK Telecomms engineer and software developer who was frustrated by expensive back office planning software that's never there when or where you need it most.
All interfaces are powered by dedicated UK servers running open source software and supported by global SRTM2 terrain data accurate to 90 metres.
The systemuses the Longley Rice propagation model, suitable for RF systems between 20 and 20,000MHz. Enhance accuracy with antenna patterns, buildings and radio templates.
Alex learnt RF communications through a career as a front line radio engineer in some of the most testing communications environments in the world. As an end user and developer, he has been able to develop software for other radio users that is both intuitive and sophisticated.
The service is powered by dedicated 64 bit Linux servers hosted in Manchester, England which run open source planning software derived from SPLAT!.
Technical details
Input options | Output options | Info |
| Frequency 20 to 20,000 MHz RF power (ERP) 0.1 to 2,000,000 Watts Receiver sensitivity (dB) 0 to -160 Coverage Radius - 1 to 200km (Keyhole Radio) MGRS and decimal degrees Path Loss (dB) Received Power (dBm) Signal Strength (dBuV/m) Tile resolution (m) (70 / 140 / 280) Customisable colours | Google Maps embedded overlay Google Earth KMZ download HTML hyperlinks for social sharing PNG image Transparency slider (app) Blur slider (app) | US Irregular Terrain Model Terrain - NASA SRTM - ~90m resolution, varies with latitude 99% Coverage between 60 degrees latitude Dedicated server User defined templates Searchable templates by keyword or feature |
The algorithm
This service is powered by open source software. The web interface is powered by 'Signal Server' which is a server optimised version of SPLAT! (Signal Propagation Loss And Terrain analysis tool) v1.3.
It uses the Irregular Terrain propagation Model (ITM), also known as the 'Longley Rice' model which was designed for planning UHF television broadcasting but has applications across a very wide proportion of the radio spectrum between 20 and 20,000 Megahertz.
ITM has two parts: a model for predictions over an area and a model for point-to-point link predictions, this site leverages the former.
It uses the Irregular Terrain propagation Model (ITM), also known as the 'Longley Rice' model which was designed for planning UHF television broadcasting but has applications across a very wide proportion of the radio spectrum between 20 and 20,000 Megahertz.
ITM has two parts: a model for predictions over an area and a model for point-to-point link predictions, this site leverages the former.
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