Evaluation of the ASAR GM soil moisture product

With the increasing number of remotely sensed soil moisture products a need for their standardized evaluation becomes necessary. This work comprises of two major parts. First, it provides a brief overview on three advanced evaluation measures commonly used to evaluate soil moisture products. Second, it investigates the performance of the triple collocation (TC) and error propagation (EP) methods when these are used to evaluate the medium resolution ASAR GM soil moisture product. The study highlights the fact that each evaluation method has limitations and presumptions that may not always be fully achievable. It further demonstrates that a combination of only two evaluation methods can shed more light on the performance quality of the methods and may lead to an improved understanding of the error structures of the product.