CDO

create a mask (ones and zeros) for each radiometer data using the comparison operators, and enssum give you the "count" I guess. For more info regarding comparison operators: https://code.zmaw.de/projects/cdo/embedded/1.6.4/cdo.html#x1-1470002.5

here is an example, assuming that the precipitation rate is +ve and the missing values are properly set

cdo -gtc,0 ifile00 mask_ofile00
cdo -gtc,0 ifile01 mask_ofile01

cdo -enssum mask_ofile00 mask_ofile01 ofile

should give the "count" at each grid point; to create a "count" variable, just rename (use chname) the original variable to "count" and merge to your data

Hope this helps

Hi,
it works very well! It is just what I was looking for.
Thank you very much for your help.
AC Marra

Hi, one more question about ensmean. If I have files with two or more variables, is it possible to select one variable (for example rain rate) to calculate the mean and another variable (for example the "count" of the previous question) to be summed by means of enssum? At the moment if I use ensmean, it calculates the mean of all the variables. Maybe I have to split the file in different files, each one containing one variable?
Thank you in advance.
AC Marra

I don't think it is possible to chain ensmean, enssum operators. Please have a look at the CDO doc section 1.2.4 Operator chaining: https://code.zmaw.de/projects/cdo/embedded/1.6.4/cdo.html#x1-100001.2.4 for more info regarding the same. (you may try with select operator, e.g., cdo -ensmean -select,name=pr_rate 'ifiles*' ofile)

Maybe I have to split the file in different files, each one containing one variable?

the SPLIT operators may be helpful: https://code.zmaw.de/projects/cdo/embedded/1.6.4/cdo.html#x1-880002.2.6

Cheers,
J

Hi,
I have done by splitting and again merging, after applying ensmean and enssum operators.
Thank you.
AC Marra