The HOMEChem merges have been created by Dr. Anna Hodshire (Anna.Hodshire@colostate.edu & anna@handixscientific.com). Please check out the associated readmes for more information. All remaining questions should be directed to both Dr. Hodshire and PI Dr. Delphine Farmer (Delphine.Farmer@colostate.edu). Due to the large number of instruments and individual measurements taken during HOMEChem, we have not been able to incorporate all HOMEChem measurements into these merges. **We highly encourage data users to:** - explore the folders provided on this site to see what other instruments are available. - read the original instrument readme for important information about data flags, instrument location, uncertainties and more. The code to make these merges has been developed by NASA for field campaigns and documentation can be found here: https://www-air.larc.nasa.gov/missions/etc/onlinemergedoc_v01.pdf The merge code itself was generously provided by Morgan Silverman (NASA) in IGOR and has been translated to Python. The python script will be made available in Anna Hodshire's GitHub by March 1, 2021 and a link will be provided here. A few notes on the merges: - If the original data is >1 minute resolution, there will many missing data flags in the 1 and 5 min file. The merge does not interpolate data and instead just takes a weighted average of any data that falls within the merge time interval. - We do not have any vector data in the merges, so all weighting follows equation (4) in the https://www-air.larc.nasa.gov/missions/etc/onlinemergedoc_v01.pdf document. - We did not include standard deviation or LOD in the merges. We also did not include any data flags and encourage the user to view the original posted data files of any instruments the user is interested in for additional information. - Some instrument data contains a high number of significant figures (for example, the Iodide CIMS data). In order to keep the merges at a reasonable size, we have provided 4 significant figures for the gas-phase and combined (outdoors) merges and 3 significant figures for the aerosol-phase merges. Users interested in higher-resolution data should use the original posted data files. - Appropriate use of the merges depends on the user's research questions, and may not be appropriate for all analyses.