Title - Data associated with "A cautionary report of calculating methane emissions using low-cost fence-line sensors"

Abstract - A simulated fence-line was constructed at the Colorado State University Methane Emissions Technology Evaluation Center (METEC) site in Fort Collins, CO, USA between the August 27th and September 4th 2020.  Four Figaro TGS2611-E00 sensors (Figaro Engineering, Inc.) were deployed with control from a Raspberry Pi and power supplied by solar panels.  The sensors were mounted in holes in the bottom of a weather-resistant box and exposed to sample air passing the bottom of the box.  Each sensor box also contained a DHT22 temperature and relative humidity sensor (Adafruit Industries). Data presented here were collected by the “Node 1” sensor 30 m away at 45 °N to the emission point.  Methane concentration data were collected every 5 seconds during a natural gas emission of 84 g CH4 h-1 between 2020-08-27 1800 UTC and 2020-08-29 1559 UTC, 167 g CH4 h-1 between 2020-08-29 1600 UTC and 2020-08-31 1559 UTC, and 313 g CH4 h-1 between 2020-08-31 1600 UTC and 2020-09-02 1457 UTC,

Contact - Stuart Riddick, Stuart.Riddick@colostate.edu, (970) 213-1984 

Recommended data citation - Riddick, S. & Ancona, R. 2022. Data associated with "A cautionary report of calculating methane emissions using low-cost fence-line sensors." Colorado State University. Libraries. http://dx.doi.org/10.25675/10217/234550

Associated article citation - S. N. Riddick, R. Ancona, F. Cheptonui, C. Bell, A. Duggan, K. E. Bennett, and D. Zimmerle. A cautionary report of calculating methane emissions using low-cost fence-line sensors. Elementa: Science of the Anthropocene 10 (1): 00021. https://doi.org/10.1525/elementa.2022.00021

Data License - CC0 (https://creativecommons.org/share-your-work/public-domain/cc0/)

Format of data files - .csv 

Location where data were collected - Methane Emissions Technology Evaluation Center, 3401 West Vine Drive, Fort Collins (40.595654, -105.139409)

Time period during which data were collected - 2020-08-27 1800 UTC to 2020-09-02 1457 1559 UTC

File Information
Met_Data.csv - Meteorological data collected at the METEC site in Fort Collins, CO from 2020-08-27 1800 UTC to 2020-09-02 1457 UTC.  The data presented are minute averaged.
Node1.csv - Raw/unanalyzed data from one Figaro TGS2611 sensors deployed at the METEC site in Fort Collins, CO from 2020-08-27 1800 UTC to 2020-09-02 1457 UTC.  The sensor measured the methane concentration every 5 seconds from the source 30 m away at 45° to North.
Node3.csv - Raw/unanalyzed data from one Figaro TGS2611 sensors deployed at the METEC site in Fort Collins, CO from 2020-08-27 1800 UTC to 2020-09-02 1457 UTC.  The sensor measured the methane concentration every 5 seconds from the source 30 m away at 135° to North.
Node11.csv - Raw/unanalyzed data from one Figaro TGS2611 sensors deployed at the METEC site in Fort Collins, CO from 2020-08-27 1800 UTC to 2020-09-02 1457 UTC.  The sensor measured the methane concentration every 5 seconds from the source 30 m away at 225° to North.
Node12.csv - Raw/unanalyzed data from one Figaro TGS2611 sensors deployed at the METEC site in Fort Collins, CO from 2020-08-27 1800 UTC to 2020-09-02 1457 UTC.  The sensor measured the methane concentration every 5 seconds from the source 30 m away at 315° to North.
Readme.txt - Metadata for meteorological data and for fence-line data from nodes 1, 3, 11, and 12

Variable information - meteorological data
Column	Column_Header	Unit	Description
A	Date_Time	N/A	Date and time of data
B	WS_1.2m_m/s	m s-1	Wind Speed at 1.2 m AGL
C	WS_7m_m/s	m s-1	Wind Speed at 7 m AGL
D	WD_°	°	Wind direction in degrees to North
E	T_°C	°C	Air temperature at 1.2 m AGL
F	RH_%	%	Relative humiditiy at 1.2 m AGL
G	P_mbar	mbar	Atmsopheric pressure

Variable information - fence-line data
Column	Column_Header	Unit	Description
A	Node ID	N/A	Node ID of the Sensor
B	Temp (C)	°C	Temperature of the sensor
C	Humidity(%)	%	Relative humidity at the sensor
D	Pyra(WPM)	W m-2	Solar irradiance
E	CH4_Left (V)	V	Voltage of the TGS2611 sensor
F	CH4_Right (V)	V	Voltage of a 2nd unused TGS2611 sensor
G	PPM1	N/A	Methane concentration (uncalculated)
H	PPM2	N/A	Methane concentration (uncalculated)
I	System Time	N/A	System time of measurement
J	Time	N/A	Date Time of measurement MM/DD/YYYY HH:MM
K	SYS_Time_Rounded	N/A	System time rounded to nearest minute


Date dataset was last modified - 2022-03-26