iSCAPE Low Cost Sensor Development Data

Dataset Description

This dataset contains all the tests used for the low-cost sensor development during the iSCAPE project. The dataset is divided in a series of tests, each of them described on a yaml file with the test name. Each csv file contains time series data of each experiment, and the yaml files contain the lists of devices used in each test. The tests are described in the comment of the yaml file, and are meant to be self explanatory. The conditions of the test and the purpose vary, and their reports are also included.

Sensors

The sensors used are herein referred as Citizen Kits or Smart Citizen Kits, and the Living Lab Station or Smart Citizen Station. These are a set of modular hardware components that feature a selection of low cost sensors for environmental monitoring listed below. The Smart Citizen Station is meant to expand the capabilities of the Smart Citizen Kit, aiming to measure pollutants with more advanced sensors. The hardware is licensed under CERN Open Hardware License V1.2 and is fully described in the HardwareX Open Access publication: https://doi.org/10.1016/j.ohx.2019.e00070. The sensor documentation can be found at https://docs.smartcitizen.me and with this DOI at Zenodo: https://doi.org/10.5281/zenodo.2555029.

In the list below, the different sensors for the Citizen Kits are detailed, and their [CHANNELS] in the csv files above linked.

• Air temperature (ºC): Sensirion SHT-31 [TEMP]
• Relative Humidity (%rh): Sensirion SHT-31 [HUM]
• Noise level (dBA): Invensense ICS-434342 [NOISE_A]
• Ambient light (lux): Rohm BH1721FVC [LIGHT]
• Barometric pressure (kPa): NXP MPL3115A26 [PRESS]
• Particulate Matter PM 1 / 2.5 / 10 (µg/m3) Planttower PMS 5003 [EXT_PM_1,EXT_PM_25,EXT_PM_10]

In the list below, the different sensors for the Citizen Kits are detailed, and their [CHANNELS] in the csv files above linked.

• Air Temperature (ºC) Sensirion SHT-31 [TEMP]
• Relative Humidity (% REL) Sensirion SHT-31 [HUM]
• Noise Level (dBA) Invensense ICS-434342 [NOISE_A]
• Ambient Light (Lux) Rohm BH1721FVC [LIGHT]
• Barometric pressure and AMSL (Pa and Meters) NXP MPL3115A26 [PRESS]
• Carbon Monoxide (µg/m3 (Periodic Baseline Calibration Required) SGX MICS-4514 [NA]
• Nitrogen Dioxide (µg/m3 (Periodic Baseline Calibration Required) SGX MICS-4514 [NA]
• Carbon Monoxide (ppm) Alphasense CO-B4 [GB_1W, GB_1A]
• Nitrogen Dioxide (ppb) Alphasense NO2-B43F [GB_2W, GB_2A]     
• Ozone (ppb) Alphasense OX-B431 [GB_3W, GB_3A]
• Gases Board Temperature (ºC) Sensirion SHT-31 [GB_TEMP] or [EXT_TEMP]
• Gases Board Rel. Humidity (% REL) Sensirion SHT-31 [GB_HUM]  or [EXT_HUM]
• PM 1 (µg/m3) Plantower PMS5003 [EXT_PM_1] or [EXT_PM_A_1], [EXT_PM_B_1] for each PM sensor in the case of the Living Lab Station
• PM 2.5 (µg/m3) Plantower PMS5003 [EXT_PM_25] or [EXT_PM_A_25], [EXT_PM_B_25] for each PM sensor in the case of the Living Lab Station
• PM 10 (µg/m3) Plantower PMS5003 [EXT_PM_10] or [EXT_PM_A_10], [EXT_PM_B_10] for each PM sensor in the case of the Living Lab Station
• PN between 0.3um<0.5um particle size (#/l) Plantower PMS5003 [EXT_PN_03] or [EXT_PN_A_03], [EXT_PN_B_03] for each PM sensor in the case of the Living Lab Station
• PN between 0.5um<1um particle size (#/l) Plantower PMS5003 [EXT_PN_05] or [EXT_PN_A_05], [EXT_PN_B_05] for each PM sensor in the case of the Living Lab Station
• PN between 1m<2.5um particle size (#/l) Plantower PMS5003 [EXT_PN_1] or [EXT_PN_A_1], [EXT_PN_B_1] for each PM sensor in the case of the Living Lab Station
• PN between 2.5m<5um particle size (#/l) Plantower PMS5003 [EXT_PN_25] or [EXT_PN_A_25], [EXT_PN_B_25] for each PM sensor in the case of the Living Lab Station
• PN between 5m<10um particle size (#/l) Plantower PMS5003 [EXT_PN_5] or [EXT_PN_A_5], [EXT_PN_B_5] for each PM sensor in the case of the Living Lab Station
• PN between >10um particle size (#/l) Plantower PMS5003 [EXT_PN_10] or [EXT_PN_A_10], [EXT_PN_B_10] for each PM sensor in the case of the Living Lab Station

How to find the data

Each yaml file contains the description of a test. Each test is comprised of recordings of several devices in the same location and during the same period. Each yaml file is comprised of the following fields:

• author: who has been in charge of performing the test (internal reference - not relevant)
• comment: describing in general terms what was done in the test, and with what purpose
• commit: the firmware commit (in the case of Smart Citizen devices) with which the test was performed, for development purposes only
• devices: a descriptor containing different fields for traceability (below)
• id: the test name
• project: within the test was performed, in this case it is always iscape
• report: if there is any report analysing the test
• type_test: indoor, oudoor test or other.

Description of devices entry

For each device that was used in the test, two generic types are used:

• low cost sensors (type: STATION or KIT)
• high end sensors (type: REFERENCE)

For low cost Smart Citizen sensors, the fields are:

• alphasense: electrochemical sensors device ids, by pollutant (for manufacturer calibration) and slots in which they were placed
• device_id: device id in Smartcitizen API
• fileNameInfo: not used
• fileNameProc: (only if source = csv is specified) 2019-03_EXT_UCD_URBAN_BACKGROUND_API_CITY_COUNCIL_REF.csv
• fileNameRaw: (only if source = csv is used) raw file name
• frequency: original recording frequency
• location: for timezone correction only, not accurate
• max_date: last recording date
• min_date: first recording date
• name: self-explanatory
• pm_sensor: if there was a pm sensor connected (all of them are PMS5003 if no sensor is specified)
• source: api or csv
• type: STATION (KIT + Alphasense + PM board with two PMS5003) or KIT
• version: smartcitizen hardware version

For high end sensors, the fields are:

• channels: which channels the device was recording for internal convertion
  • names: which are the columns in the csv file
  • pollutants: which pollutants do they respectively refer to
  • units: the units of these pollutants
• equipment: the brand of the analyser
• fileNameProc: same as above
• fileNameRaw: same as above
• index: format in which the timeindex is done, for parsing purposes
  • format: (example '%Y-%m-%d %H:%M:%S')
  • frequency: frequency at which the device was recorded
  • name: column name
• location: same as above
• name: name of the device
• type: REFERENCE (always for these devices)
• source: csv

iSCAPE Dataset Reference Numbers:

The datasets here presented are related to the following iSCAPE dataset reference numbers:

• DS_TS_054
• DS_TS_062
• DS_TS_063
• DS_TS_065
• DS_TS_067
• DS_TS_068
• DS_TS_069
• DS_TS_070
• DS_TS_071
• DS_TS_072
• DS_TS_073
• DS_TS_074
• DS_TS_075
• DS_TS_076
• DS_TS_077
• DS_TS_078
• DS_TS_079
• DS_TS_080
• DS_TS_081
• DS_TS_084
• DS_TS_088
• DS_TS_089
• DS_TS_090
• DS_TS_092