An Airborne GNSS-R Driven Low-Latency Flood Assessment Development

We present here the development and initial results of a low latency GNSS-R flood detection and visualisation framework, the Flood Assessment Spatial Triage. This uses airborne GNSS-Reflectometry data which are routinely collected as part of the Rongowai mission, hosted on an Air New Zealand Q300 domestic aircraft. The framework is able to detect flooding with low latency after the aircraft lands, through rapid processing of the Level-0 data which combines reflected GNSS signals with terrain data. These may be useful for flood preparedness and response, and may additionally help to guide the tasking of imaging assets.