Tropospheric Ducting Status - Southeastern Pennsylvania

This page tracks tropospheric ducting conditions for the 900 MHz band in Southeastern Pennsylvania. Ducting scores are derived from atmospheric modeling (data from Open-Meteo); when conditions are elevated, Meshtastic radios located at unusually distant locations begin appearing on the local mesh. These correlated nodes serve as real-world RF confirmation of tropospheric ducts (in theory). All charts scope to the current event window when an event is active. More info - How it works

Score	Label	Meaning
0.0 – 0.9	Negligible	Standard propagation only
1.0 – 2.9	Weak	Mild super-refraction; slight range extension possible
3.0 – 4.9	Moderate	Ducting layer detected; some path enhancement likely
5.0 – 6.9	Strong	Well-developed duct; good conditions for extended paths
7.0 – 10.0	Excellent	Exceptional ducting; significant range extension expected