AS SET OUT IN THE AEROSOL-CLOUD-ECOSYSTEM (ACE) MISSION WHITEPAPER ACE SEEKS TO OBTAIN IMPROVED MICROPHYSICAL INFORMATION ON THE VERTICAL PROFILE OF AEROSOL CLOUD AND PRECIPITATION MICROPHYSICAL PROPERTIES THAT ARE VITAL FOR IMPROVING OUR UNDERSTANDING OF MICROPHYSICAL PROCESSES AND DEVELOPING IMPROVED CLIMATE MODEL PARAMETERIZATIONS. CURRENT SATELLITE RETRIEVALS OF BOUNDARY LAYER CLOUD PROPERTIES GENERALLY RELY ON ONE DIMENSIONAL (1D) RADIATIVE TRANSFER (RT). ERRORS DUE TO THE USE OF 1D RT FOR MANY (AND PERHAPS MOST) BOUNDARY LAYER CLOUDS ARE PROBLEMATICALLY LARGE. UNDER PRIOR SUPPORT FROM THE ACE PROGRAM I HAVE (1) BEEN EVALUATING THE POTENTIAL FOR RETRIEVALS THAT USE THREE-DIMENSIONAL (3D) RT (RATHER THAN 1D RT) AND (2) PARTICIPATED IN THE PLANNING AND EXECUTION OF THE OLYMPEX PENINSULA EXPERIMENT (OLYMPEX) IN FY 2016 WITH THE GOAL OF GATHERING OBSERVATIONAL DATA TO FURTHER THE DEVELOPMENT AND EVALUATION OF CLOUD MICROPHYSICAL RETRIEVALS FOR ACE. OVERALL OLMPLEX WAS VERY SUCCESSFUL WITH 10 ER-2 FLIGHTS AND THREE FLIGHTS IN PARTICULAR (THOSE ON 11/24 12/04 AND 12/13/2105) HAVING A STRONG FOCUS ON LOW-LEVEL CLOUDS WITH COORDINATED COLLECTION OF IN SITU MICROPHYSICAL DATA BY THE UNIVERSITY OF NORTH DAKOTA (UND) CITATION. I HAVE IDENTIFIED CASE STUDIES BASED ON THESE FLIGHTS AND PROPOSE HERE TO CONTINUE THE EVALUATION