NCAR/EOL/RAF Giant Aerosol Data PI: Jorgen B. Jensen Email: jbj@ucar.edu Phone: 303-497-1028 Address: NCAR Research Aviation Facility Address: P. O. Box 3000 Address: Boulder, CO 80307 Use of this data is subject to the ORCAS data policy, see: https://www.eol.ucar.edu/content/orcas-data-policy Data quality: SUITABLE FOR PUBLICATION Explanation of data: Slides were exposed in the free air stream onto This data set was acquired during the ORCAS project. The slides were analyzed in the NCAR/EOL/RAF GNI slide chamber, using a dual-optical microscope. Slides were inserted into a humidified chamber with a relative humidity of about 90%. The images were analyzed using an automated edge detection algorithm, and using spherical cap geometry to determine the solution drop volume. Subsequently, the equivalent dry NaCl equivalent radius was determined using the Kohler equation for concentrated solutions, specifically Pruppacher and Klett, 1978, eq. 6.26b, using a full chemical potential calculation. For a detailed description, see a manuscript in preparation by Jensen et al., available from the author.