This is Suman Maity from Indian Institute of Technology Kharagpur, India. Frequently we are validating our model output with some observation datasets. For the validation purpose people are using different skill scores. Equitable Threat Score (ETS) is such a score for verification. My query is how to calculate that? for example I have 2007 (June-July-August-September) model simulated daily rainfall data and GPCP rainfall data. If I want to calculate the ETS then how to do that?

Please help in this regard. Any suggestion will be highly appreciable.