readme.txt - readme file for "PM2.5 and AOD measurements from the Citizen Enabled Aerosol Measurements for Satellites (CEAMS) 2019 Denver deployment" dataset by Michael Cheeseman

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General Information
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TITLE: PM2.5 and AOD measurements from the Citizen Enabled Aerosol Measurements for Satellites (CEAMS) 2019 Denver deployment

CONTACT: Michael Cheeseman (cheesemj@colostate.edu) 

RECOMMENDED CITATION: Michael Cheeseman, Bonne Ford,  Zoey Rosen, Eric Wendt, Christian L'Orange, Casey Quinn, Marilee Long, Shantanu H. Jathar, John Volckens, Jeffrey R. Pierce, 2019. PM2.5 and AOD measurements from the Citizen Enabled Aerosol Measurements for Satellites (CEAMS) 2019 Denver deployment. Colorado State University. Libraries. http://dx.doi.org/10.25675/10217/233884

ASSOCIATED PUBLICATIONS: 
1. Michael Cheeseman, Bonne Ford,  Zoey Rosen, Eric Wendt, Alex DesRosiers, Aaron J. Hill, Christian L'Orange, Casey Quinn, Marilee Long, Shantanu H. Jathar, John Volckens, Jeffrey R. Pierce (2019): Technical note: Investigating sub-city gradients of air quality: lessons learned with low-cost PM2.5 and AOD monitors and machine learning. Atmospheric Chemistry and Physics [preprint], doi:10.5194/acp-2021-751
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 and Michael Cheeseman. Collected by participants in the CEAMS network using an Aerosol Mass and Optical Depth (AMOD) sampler.

SPATIAL COVERAGE: Denver, Colorado
TEMPORAL COVERAGE: 14 November - 20 January 2020

NUMBER OF FILES: 220 text files

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. 

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 (cheesemj@colostate.edu) before use for any extra caveats (particularly with respect to the filter measurements).