1 Introduction
In previous work, the Coupled Air-Sea Processes and EM Ducting Research (CASPER) missions sought to characterize the propagation of signals through the air in a marine environment [1]. More specifically, changes in vertical temperature and humidity can cause the trapping of electromagnetic (EM) waves in atmospheric ducts which signifi-cantl y affect performance [2]. The evaporation duct height (EDH) can be estimated by measuring the EM field with an array of receivers [3]. Despite these missions, coherent measurement of a ducted wave at a coastal boundary is still needed for a complete description of the meteorological conditions.