Low-cost air-quality and noise sensor-network telemetry and analysis code, Pantelimon street canyon, Bucharest, 2025 to 2026

This deposit contains the raw telemetry and the complete analysis code for a 20-node solar-powered low-cost air-quality and noise sensor network operated for one year (13 June 2025 to 13 June 2026) in the Pantelimon street canyon, Bucharest, Romania. The nodes are Sensirion SEN55 modules with an add-on acoustic module. It is provided so that the results of the associated manuscript can be reproduced from the raw data. The data folder holds one file per measured channel (PM1, PM2.5, PM4, PM10, VOC index, NOx index, air temperature, relative humidity, A-weighted noise, and the LoRa link quality metrics RSSI and SNR), each a time series with one column per node. It also holds a node metadata file giving, for every node, its site class, distance to the nearer arterial, annual availability, and location description, taken from the operator deployment record. The code folder holds the Python analysis scripts (pandas, numpy, scipy, statsmodels, matplotlib). They load the telemetry, define the two analysis blocks and the coverage-matched per-node offsets, and reproduce the variance decomposition, the node inventory, the geometric tests, the campaign-length resampling, the resolution-test validation, and the figures. A README file documents the folder layout, the run order, and the method. Values that depend on the manufacturer specification use the Sensirion SEN55 device-to-device precision of 5 µg/m³ plus 5% of reading. Blank cells in the telemetry indicate a node that was not reporting.