A ray-traced radio propagation model of downtown Cairo. Site configurations are sent to a GPU solver, which traces rays from every sector through the real building geometry and returns coverage, SINR, CQI and cell association. Nothing here comes from a path-loss formula.
NVIDIA Sionna RT for the ray tracing, on a T4 GPU. Building footprints from OpenStreetMap. CesiumJS for the 3D view. Each solve traces up to 15 bounces per ray and returns a 5 m resolution map of the whole area.
Building heights. About 92% of Cairo buildings carry no height tag in OpenStreetMap, so they take an assumed 22.4 m. Coverage figures are optimistic wherever the real building is taller.
Outdoor only. The map is computed on a plane 1.5 m above ground. Per-building figures are sampled on a 10 m outdoor ring at the facade. The indoor number is a 3GPP TR 38.901 O2I estimate applied on top, not a ray traced result, and it is labelled as such wherever it appears.
Noise floor. Set from the channel bandwidth of each band rather than left at the library default, so SINR is honest at the cell edge.
Materials. ITU-R P.2040 properties, which are only defined above 1 GHz. Bands below that are noted explicitly when used.
The default palette is viridis-derived and ordered by lightness, so it
survives colour vision deficiency and still reads in greyscale. A
Classic toggle restores the green-to-red an RF planner
expects from conventional planning tools.