This paper presents a new algorithm, Searchlight, capable of tracking precipitation advection through the complex spatiotemporal sampling pattern of multiplatform low-Earth-orbiting (LEO) passive and active microwave satellite data sets. The algorithm is based on the concept of "shining" a searchlight forward in time along proposed advection velocity vectors from a given LEO overpass. The searchlight "beam" links precipitation patterns in the current satellite overpass to corresponding patterns in multiple future overpasses. A global optimization determines an advection model by maximizing mutual information between linked precipitation measurements. The algorithm has been validated against surface radar over a region covering the Central and Eastern U.S.
Bellerby, T. (2013). Searchlight: Precipitation advection tracking using multiplatform low-earth-orbiting satellite data. IEEE transactions on geoscience and remote sensing : a publication of the IEEE Geoscience and Remote Sensing Society, 51(4), 2177-2187. https://doi.org/10.1109/TGRS.2012.2211604