readme.txt - readme file for "Data collected during the pilot campaign of the Citizen-Enabled Aerosol Measurements for Satellites (CEAMS) network in northern Colorado" dataset by Bonne Ford

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General Information
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TITLE: Data collected during the pilot campaign of the Citizen-Enabled Aerosol Measurements for Satellites (CEAMS) network in Northern Colorado

CONTACT: Bonne Ford (bonne@atmos.colostate.edu) 

RECOMMENDED CITATION: Ford, B., J.R. Pierce, E. Wendt, M. Long, S. Jathar, J. Mehaffy, J. Tryner, C. Quinn, L. van Zyl, C. L'Orange, D. Miller-Lionberg, and J. Volckens, 2019. Data collected during the pilot campaign of the Citizen-Enabled Aerosol Measurements for Satellites (CEAMS) network in northern Colorado. Colorado State University.  

ASSOCIATED PUBLICATIONS: 
1. Ford, B., J. R. Pierce, E. Wendt, M. Long, S. Jathar, J. Mehaffy, J. Tryner, Casey Quinn, L. van Zyl, C. L'Orange, D. Miller-Lionberg, and J. Volckens (2019): A low-cost monitor for measurement of fine particulate matter and aerosol optical depth. Part 2: Citizen science pilot campaign in northern Colorado, Atmos. Meas. Tech. Discuss., doi:10.5194/amt-2019-109, in review.
2. Wendt, E., C. Quinn, D. Miller-Lionberg, J. Tryner, C. L'Orange, B. Ford, A. Yalin, J. R. Pierce, S. Jathar, and J. Volckens (2019): A low-cost monitor for measurement of fine particulate matter and aerosol optical depth. Part 1: Specifications and testing, Atmos. Meas. Tech. Discuss., doi:10.5194/amt-2019-110, in review.

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Data Sources and Structure 
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SOURCE: Data compiled by Bonne Ford. Collected by participants in the CEAMS network using an Aerosol Mass and Optical Depth (AMOD) sampler. Filter analysis by John Mehaffy.

SPATIAL COVERAGE: Northern Colorado
TEMPORAL COVERAGE: 28 October - 15 December 2017

FOLDER DIRECTORY:
1. "Log Files" contains subdirectories for each participant (designated by a unique alphanumeric identifier "bp###") with text log files.
2. "Filters" contains csv files with filter analysis data.

NUMBER OF FILES: 69 text files in "Log Files" and 4 csv files in "Filters" 


DESCRIPTION of FILES:
Text log files include all output from the AMOD device (including multi-wavelength aerosol optical depth [AOD] values and optical particle mass values) for each participant. These are the raw data files. File name denotes the instrument serial number (AD0#####), start time, and corresponding filter number (last 3 numbers in file name). To protect the privacy of participants, all GPS location data has been truncated in log files. 

Also included are files for the filter analysis. Blank filters are noted in the files. Filters can be linked to log files by the log file name (last three numbers in log file name). Location of the lab analysis is noted in the "CEAMS Gravimetric Results.csv". This is important because we had an issue with the Scott building microbalance and switched to a new microbalance in the Powerhouse for the duration of the campaign. Please see associated publications for more information.
1. "CEAMS Gravimetric Results.csv" contains the pre- and postweights of filters used by participants, values are given to the closest microgram.  
2. "CEAMS XRF Results.csv" gives elemental composition measured on the filters with results presented as the closest ng. Elements are listed by their chemical symbol.
3. "CEAMS Black Carbon results.csv" gives the black carbon from filters with results to the closest microgram. Empirical relationship used is included in the file.  
4. We also include weights for the lab blanks in "Lab Blanks.csv". These were filters that were kept in the lab during the entire measurement period and not used for sampling.


LIMITATIONS:
We have included all data collected. These are the raw data files. Please see associated publications to read about the quality control we applied during analysis.
To protect the privacy of participants, all GPS location data has been truncated in log files. These will not provide the exact location of the measurement.

RECOMMENDED USE: 
This dataset can be used to look at local wintertime air quality in northern Colorado. In particular, there are PM2.5 and AOD measurements that can be used to look at ariability, model comparisons, or satellite observation comparisons. Please read associated publications to understand our analysis methods and qa procedures. Contact Bonne Ford (bonne@atmos.colostate.edu) before use for any extra caveats (particularly with respect to the filter measurements).





