Re: [ferret_users] Appending time steps to netcdf file

[Ansley Manke <ansley.b.manke@xxxxxxxx>]

Hi Stephen,
As Jimmy says, a descriptor file is a good way to form a time series 
dataset from files with time series data. You can also append to netcdf 
files in time, if the time axes can be reconciled.  Without more detail 
on what the time axis is like in your input datasets, it's hard to know 
what went wrong with what you tried.  Are the data already on a 6-hour 
time axis at time steps 1:27 and 28:67?  If so you do not need to define 
a new time axis and define the new variables uprs2 and vprs2.  The 
example in the documentation is for reading ascii data and converting it 
to netcdf.

Stephen R. Guimond wrote:
> Hello,
>  I have three netcdf files with different time steps that I want to 
> combine into one file.  I have looked at the documentation/mail 
> archives, but am still confused.  Here is what I did:
> !################################
> set memory/size=100
>
> define axis/t="04-Aug-2000 06:00":"22-Aug-2000 12:00":6/units=hours time
>
> define grid/t=time tgrid
>
> use storm_3d_1.nc
>
> let uprs2 = t[g=tgrid]*0 + uprs
> let vprs2 = t[g=tgrid]*0 + vprs
>
> save/file=storm_3d.nc/l=1:27 uprs2,vprs2
>
> cancel var/all;cancel data/all
>
> use storm_3d_2.nc
>
> let uprs2 = t[g=tgrid]*0 + uprs
> let vprs2 = t[g=tgrid]*0 + vprs
>
> save/append/file=storm_3d.nc/l=28:67 uprs2,vprs2
> !###############################################
>
> I get this error:
>
> **ERROR: inconsistent sizes of data regions: T axis
>          UPRS has 13 points (L=28:40)
>          expression has 40 points (L=28:67)
> LIST/FORMAT=CDF/append/file=storm_3d.nc/l=28:67 uprs2,vprs2
> Command file, command group, or REPEAT execution aborted
>
> I don't know where the "13 points" are coming from.
>
> Any suggestions?
>
> Steve
>
> =======================================================
> Stephen R. Guimond
> Graduate Research Assistant
> Center for Ocean-Atmospheric Prediction Studies (COAPS)
> Tallahassee, FL 32304
> =======================================================
>
> ----------------------------------------------------------------
--
~>   ~>   ~>   ~>   ~>   ~>   ~>   ~>   ~>   ~>   ~> 
Ansley Manke, NOAA/PMEL   ansley.b.manke@noaa.gov
7600 Sand Point Way NE, Seattle WA
Phone 206-526-6246,  FAX 206-526-6744