AirMLP - SPS30 low-cost sensors and Tecora reference station PM 2.5 data

The information below describes a dataset related to a study conducted in Turin, Italy, involving low-cost laser-scattering SPS30 sensors placed by Wiseair SRL and a Tecora reference station placed by Arpa Piemonte (Italian Air Quality Agency). This dataset spans two different time periods in 2022, specifically from March 1, 2022, to April 29, 2022, and from October 26, 2022, to December 30, 2022. The data in this dataset pertains to the mass concentration of PM2.5 (particulate matter with a diameter of 2.5 micrometres or less).

The reference station's data is divided into two periods and is provided in files named "rf_x.csv." These files contain hourly data and timestamps in GMT+1. Each file has three columns:

• "valid_at" (in Rome local hour, GMT+1)
• "valore_originale" (PM 2.5 raw mass concentration values recorded by the reference station)
• "pm2p5" (PM 2.5 mass concentration validated values by the air quality agency)

The low-cost sensors, referred to as "ari_xxxx.csv," provide data at approximately 15-minute frequency. These files contain the following columns:

• "valid_at" (in GMT)
• "pm2p5" (PM 2.5 raw mass concentration measured by the SPS30 sensor)
• "relative_humidity" (expressed as a percentage)
• "temperature" (in degrees Celsius)
• "pressure" (in hPA)
• "wind_speed" (in meters per second)
• "cloud_coverage" (expressed as a percentage)

Notably, the "relative_humidity" and "temperature" values are gathered from sensors placed within a device containing the SPS30 low-cost sensor.

Here's a summary of the specific data files in this dataset:

• "rf_1.csv": Hourly data provided by the Air Quality Agency for the first period.
• "rf_2.csv": Hourly data provided by the Air Quality Agency for the second period.
• "arpa_1727.csv," "arpa_1952.csv," and "arpa_1953.csv": Three low-cost sensors placed by Wiseair, which refer to the first period.
• "arpa_1885.csv" and "arpa_2049.csv": Two low-cost sensors placed by Wiseair, that refer to the second period.