Sensor network simulator
Five simulated solar sensor nodes around a landfill and the early-warning model, running in your browser. Change the weather, drag a sensor, open a crack in the landfill cover, and watch the forecast and the alerts respond.
Every 10 simulated minutes each node takes a reading and the 257-weight model gives the chance that methane rises at that node within 3 hours. A warning opens when the chance reaches the model's alert threshold; a rise is a 30-minute mean 25 ppm above the background node.
Simulated. No sensors are installed yet, so these readings come from a physics simulator, not real air. The forecast assumes the weather you set carries on for 3 hours. The model is the same 257-weight network the sensor dashboard runs, trained and tested on simulated readings (held-out ROC AUC 0.962); it is retrained once real nodes report.
Physics: falling barometric pressure pushes landfill gas out and rising pressure holds it in (Kissas 2022; Xu et al. 2014); a Gaussian plume with daytime mixing and stable night air; a metal-oxide methane sensor with humidity and temperature effects, corrected by calibration (Furuta et al. 2024).
Screening-grade satellite estimate: confirm with a hyperspectral satellite, an OGI drone or a ground survey before enforcement or carbon crediting.