[thredds] aggregation with different time references

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

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LSCE/IPSL, Laboratoire CEA-CNRS-UVSQ
Data Analysis and Visualization Engineer
ICMC - IPSL Climate Modelling Centre
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