It isn’t that hard to make an electronic rain gauge if you have a steady source of power or you don’t mind changing batteries often. But [Matthew Ford] offers a third option: a simple device ...

The most accurate data that can be used for these predictions are ground rain gauge observations ... have created a state-of-the-art method using the Local Ensemble Transform Kalman Filter ...

(a) The elevation (m) and examples of (b) the rain gauge observation inputs and the ... have created a state-of-the-art method using the Local Ensemble Transform Kalman Filter (LETKF) technique.