Re: [thredds] aggregation with different time references

• To: Patrick Brockmann <P.Brockmann@xxxxxxx>
• Subject: Re: [thredds] aggregation with different time references
• From: Cofiño Gonzalez, Antonio Santiago<antonio.cofino@xxxxxxxxx>
• Date: Wed, 15 Feb 2012 17:05:48 +0000

Patrick,

from the aggregation documentation :

http://www.unidata.ucar.edu/software/netcdf/ncml/v2.2/Aggregation.html

 when the units of the aggregation coordinate change on the existing coordinate 
variables, you must add timeUnitsChange="true" on the aggregation element:

Regards

Antonio

El 15/02/2012, a las 17:22, "Patrick Brockmann" <P.Brockmann@xxxxxxx> escribió:

> Hi,
> 
> I have discovered that when an aggregation has been made over time
> with files that contains different time references then the result time axis
> is not correct (not monotically increasing).
> 
> Precisely, I have files with
>             time:units = "days since 1850-01-01 00:00:00" ;
> others with
>             time:units = "days since 1870-01-01 00:00:00" ;
> or
>             time:units = "days since 1880-01-01 00:00:00" ;
> or
>             time:units = "days since 1970-01-01 00:00:00" ;
> 
> When I access to this aggregation (16 files aggregated)
> with ferret, the time axis is detected as not correct
> and the following warning is displayed
> 
> *** NOTE: Coordinates out of order or missing on axis time at subscript 241
> *** NOTE: A dummy axis of subscripts will be used
> 
> Is there a way to take into account that time references may vary
> from the different files aggregated ?
> 
> Thanks
> Patrick
> 
> -- 
> LSCE/IPSL, Laboratoire CEA-CNRS-UVSQ
> Data Analysis and Visualization Engineer
> ICMC - IPSL Climate Modelling Centre
> --
> 
> 
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