[gradsusr] ensemble reforecast runs

[Wesley Ebisuzaki]

Daniele,

   g2ctl assumes that the length of the forecast is the same for all 
ensemble members.
If not, you can do either

(1) You could try using the longest ensemble as the 1st ensemble.
      (It may work.)

(2) You have to set the TDEF by hand.

            Wesley Ebisuzaki


Daniele Mastrangelo wrote:
> Dear GrADS users,
>
> I'd like to use GrADS v 2.0.a8 to evaluate a set of 21 reforecast 
> ensemble runs. These runs are obtained running the same global model 
> initialized at the same hour and date of 21 different years.
>
> I obtained a single ctl file through "g2ctl.pl -ens" (g2ctl.pl v 
> 0.0.4o) but, when I used gribmap to produce the corresponding idx 
> file, I got the following error message:
>
> Open Error:  ensemble 1 (e2) extends beyond the time axis limits
>   The data file was not opened.
>
> I see that the problem is that these runs cover different periods; 
> moreover, I get the same error when I try to open two of the 21 
> different reforecast runs in a normal GrADS session (as file 1 and 
> file 2). Therefore, my question is: can GrADS treat a set reforecast 
> runs used as ensemble runs?
> If it cannot directly do that, is there a way to bypass the problem?
>
> Thank you,
> Daniele
>
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