In the Rongowai (sensing water) project, a next-generation Global Navigation Satellite Systems Reflectometry (GNSS-R) sensor is being mounted on an Air New Zealand Q300 aircraft, enabling greatly improved observations of soil moisture and inundation dynamics. The observations will provide an unprecedented high spatial and temporal resolution, wide-coverage measurements for analysis of soil moisture and inundation dynamics across New Zealand’s diverse landscapes. The mission will test a follow-on sensor for NASA’s CyGNSS mission, which is comprised of 8 Low Earth Orbiting spacecraft that receive both direct and reflected signals from GPS satellites. Here, we will test a new version of the sensors used on the CyGNSS satellites, which include additional signal frequencies and will incorporate Galileo (E.U.) GNSS satellites in addition to GPS.