RE: [ferret_users] Is TIME a reserved word?

["McCann, Mike" <mccann@xxxxxxxxx>]

All,

I thought I'd follow up on this for the benefit of the list archive.
(With thanks to those who responded to me.)

TIME is not a reserved word.  My input data set had TIME as a variable
and that was confusing things.  A clue that the regridding was not
working right is this output in the listing "regrid: ARRAYTYPE"; if
the regridding works it looks something like "regrid: 3600 sec on T@AVE".

I've changed the construction of my input datasets to not have a 
variable of TIME and the regridding is working now.

-Mike

> -----Original Message-----
> From: owner-ferret_users@xxxxxxxx 
> [mailto:owner-ferret_users@xxxxxxxx] On Behalf Of McCann, Mike
> Sent: Tuesday, November 18, 2008 4:23 PM
> To: ferret_users@xxxxxxxx
> Subject: [ferret_users] Is TIME a reserved word?
> 
> Dear Ferreters,
>  
> I need to write a NetCDF using an axis name of "TIME".  
> Ferret is not doing the gridding, nor reporting an error when 
> I define an axis named TIME:
> 
> ! Load a 10-minute sample data set
> USE 
> "http://dods.mbari.org/cgi-bin/nph-nc/data/ssdsdata/deployment
> s/m1/200810/m1_metsys_20081008_original.nc"
> DEFINE AXIS/T="08-Oct-2008 20:30:00":"18-Nov-2008 
> 21:30:00":3600/T0="01-JAN-1970 00:00:00"/UNITS=seconds TIME
> set region/t=11-nov-2008:"11-nov-2008 02:00"
> list AirTemperature
> 
> VARIABLE : Air Temperature (deg C)
>              DATA SET : Mooring M1 Metsys data from MBARI at 
> original sampling intervals
>              FILENAME : m1_metsys_20081008_original.nc
>              FILEPATH : 
> http://dods.mbari.org/cgi-bin/nph-nc/data/ssdsdata/deployments
> /m1/200810/
>              SUBSET   : 12 points (TIME)
>              LONGITUDE: 122W(-122)
>              LATITUDE : 36.8N
>              DEPTH (m): -2.5
>                                122W
>                                  1
>  11-NOV-2008 00:00:10 / 4598:  12.07
>  11-NOV-2008 00:10:08 / 4599:  12.03
>  11-NOV-2008 00:20:10 / 4600:  11.94
>  11-NOV-2008 00:30:10 / 4601:  11.97
>  11-NOV-2008 00:40:09 / 4602:  11.99
>  11-NOV-2008 00:50:10 / 4603:  11.94
>  11-NOV-2008 01:00:10 / 4604:  11.95
>  11-NOV-2008 01:10:08 / 4605:  11.95
>  11-NOV-2008 01:20:10 / 4606:  11.96
>  11-NOV-2008 01:30:10 / 4607:  11.90
>  11-NOV-2008 01:40:09 / 4608:  11.98
>  11-NOV-2008 01:50:11 / 4609:  11.91
> 
> list AirTemperature[gt=time@AVE]		! Listing shows 
> data at original 10-minute sampling interval
> 
>              VARIABLE : Air Temperature (deg C)
>                         regrid: ARRAYTYPE
>              DATA SET : Mooring M1 Metsys data from MBARI at 
> original sampling intervals
>              FILENAME : m1_metsys_20081008_original.nc
>              FILEPATH : 
> http://dods.mbari.org/cgi-bin/nph-nc/data/ssdsdata/deployments
> /m1/200810/
>              SUBSET   : 12 points (TIME)
>              LONGITUDE: 122W(-122)
>              LATITUDE : 36.8N
>              DEPTH (m): -2.5
>                                122W
>                                  1
>  11-NOV-2008 00:00:10 / 4598:  12.07
>  11-NOV-2008 00:10:08 / 4599:  12.03
>  11-NOV-2008 00:20:10 / 4600:  11.94
>  11-NOV-2008 00:30:10 / 4601:  11.97
>  11-NOV-2008 00:40:09 / 4602:  11.99
>  11-NOV-2008 00:50:10 / 4603:  11.94
>  11-NOV-2008 01:00:10 / 4604:  11.95
>  11-NOV-2008 01:10:08 / 4605:  11.95
>  11-NOV-2008 01:20:10 / 4606:  11.96
>  11-NOV-2008 01:30:10 / 4607:  11.90
>  11-NOV-2008 01:40:09 / 4608:  11.98
>  11-NOV-2008 01:50:11 / 4609:  11.91
> 
> 
> 
> If I name the T axis something other than "TIME" the gridding 
> does work:
>  
> DEFINE AXIS/T="08-Oct-2008 20:30:00":"18-Nov-2008 
> 21:30:00":3600/T0="01-JAN-1970 00:00:00"/UNITS=seconds TIME60
> 
> list AirTemperature[gt=time60@AVE]		! Listing shows 
> data properly gridded at 60-minute intervals
> 
>              VARIABLE : Air Temperature (deg C)
>                         regrid: 3600 sec on T@AVE
>              DATA SET : Mooring M1 Metsys data from MBARI at 
> original sampling intervals
>              FILENAME : m1_metsys_20081008_original.nc
>              FILEPATH : 
> http://dods.mbari.org/cgi-bin/nph-nc/data/ssdsdata/deployments
> /m1/200810/
>              SUBSET   : 2 points (TIME)
>              LONGITUDE: 122W(-122)
>              LATITUDE : 36.8N
>              DEPTH (m): -2.5
>                            122W
>                              1
>  11-NOV-2008 00:30 / 797:  11.98
>  11-NOV-2008 01:30 / 798:  11.94
> 
>  
> I did not see that "TIME" listed as a reserved word in the FAQ:
> http://ferret.pmel.noaa.gov/FERRET_17sep07/FAQ/data_management
> /reserved_keywords.htm
>  
> I can use ncrename(1) to rename the axis after Ferret writes 
> the file, but I thought I'd report this behavior.
>  
> -Mike
> 
> --
> Mike McCann
> Software Engineer
> Monterey Bay Aquarium Research Institute
> 7700 Sandholdt Road
> Moss Landing, CA 95039-9644
> Voice: 831.775.1769  Fax: 831.775.1736 http://www.mbari.org 
> 
> 
> 
> 
>