Snow water equivalent (SWE) is important for studying the cryosphere as well as providing better understanding of the global water cycle. Synthetic aperture radar (SAR) is a promising candidate for estimating SWE as it allows for large-scale measurements at fine spatial resolution. This thesis presents work done to design and deploy an airborne C-band SAR for measuring SWE. The instrument is a pulsed radar capable of making co- and cross-polarized measurements as well as performing interferometry over wide swaths of terrain. The system has been successfully deployed over several field campaigns and shows promising results. Artifacts due to aircraft motion are present in the results shown in this work, and further improvements to the processing algorithms can be made to improve the processed imagery. This instrument will provide valuable datasets allowing for comparison of airborne estimates of SWE to measurements from more mature spaceborne systems.