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) - grimm1 Remote dust monitor (MetOne - ES-642) - mote7 Low-cost dust sensors (NIWA - ODIN) - odinThe 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.The raw one minute data was cleaned and averaged to 10 minutes values.The data is in R binary format and corresponds of one dataframe with the following columns:"date": Timestamp (UTC) as POSIXct"PM2.5.BAM": PM2.5 measurements from BAM"PM2.5_0052": PM2.5 measurements from ODIN 0052"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"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"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"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