Co-location of low-cost PM2.5 sensors in a road tunnel environment

Data from a co-location deployment with three different sensor types:1 Beta Attenuation Monitor (Thomson Environmental) - BAM1 Aerosol spectrometer (Grimm - 11E) - grimm<br>1 Remote dust monitor (MetOne - ES-642) - mote<br>7 Low-cost dust sensors (NIWA - ODIN) - odin<br><br>The co-location took place between 22 and 26 November 2018 at Auckland's Waterview tunnel and not all instruments were operational at the same time. Empty records indicate instrument not operational.<br><br>The raw one minute data was cleaned and averaged to 10 minutes values.<br>The data is in R binary format and corresponds of one dataframe with the following columns:<br>"date": Timestamp (UTC) as POSIXct"PM2.5.BAM": PM2.5 measurements from BAM"PM2.5_0052": PM2.5 measurements from ODIN 0052<br>"PM2.5_0053": PM2.5 measurements from ODIN 0053"PM2.5_0059": PM2.5 measurements from ODIN 0059"PM2.5_0072": PM2.5 measurements from ODIN 0072"PM2.5_0074": PM2.5 measurements from ODIN 0074"PM2.5_0075": PM2.5 measurements from ODIN 0075"PM2.5_0076": PM2.5 measurements from ODIN 0076<br>"T_0052": Temperature measurements from ODIN 0052"T_0053": Temperature measurements from ODIN 0053"T_0059": Temperature measurements from ODIN 0059"T_0072": Temperature measurements from ODIN 0072"T_0074": Temperature measurements from ODIN 0074"T_0075": Temperature measurements from ODIN 0075"T_0076": Temperature measurements from ODIN 0076<br>"RH_0052": Relative humidity measurements from ODIN 0052"RH_0053": Relative humidity measurements from ODIN 0053"RH_0059": Relative humidity measurements from ODIN 0059"RH_0072": Relative humidity measurements from ODIN 0072"RH_0074": Relative humidity measurements from ODIN 0074"RH_0075": Relative humidity measurements from ODIN 0075"RH_0076": Relative humidity measurements from ODIN 0076"PM2.5.odin": Average PM2.5 from ODIN"T.odin": Average temperature from ODIN"RH.odin": Average relative humidity from ODIN"TSP.grimm": Total suspended particulate measurements from Grimm spectrometer<br>"PM10.grimm": PM10 measurements from Grimm spectrometer"PM2.5.grimm": PM2.5 measurements from Grimm spectrometer"PM1.grimm": PM1 measurements from Grimm spectrometer"n300.grimm": Number concentration of particles larger than 300nm"Temperature": Temperature measurements from ES-642 "RH": Relative humidity measurements from ES-642"Pressure": Ambient pressure measurements from ES-642"PM10.mote": PM10 measurements from ES-642"PM2.5.mote": PM2.5 measurements from ES-642