[thredds] aggregation / arithmetic between variables

Hi again,

I'm sorry to ask so many questions, i am looking around before asking these..

My next problem is that I'd like to define a 'virtual variable' that is the result of simple operations on existing variables, for example a new variable that is the sum of 2 existing ones.

I have read all about aggregating between datasets and over dimensions such as time, but i think this is different. My goal is to have a virtual WMS layer that is the result of the relationship between existing variables.

Does this sort of functionality exist at this stage, or should i be pre-processing the dataset before the thredds stage ?

cheers and have great weekends


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