[CF-metadata] request for standard name

Jim Biard jbiard at cicsnc.org
Wed Oct 11 07:35:38 MDT 2017


Heather,

In what sense do feel this doesn't qualify as an ancillary variable? 
That's not the same as an auxiliary coordinate variable. It is a data 
variable that provides support (for lack of a better phrase) to one or 
more primary data variables. I don't think common practice about how a 
variable is stored is a significant discriminator. I think CF needs a 
way to indicate relationships outside of file boundaries, but that is a 
separate issue.

I read Nan's comment as suggesting that we take a different approach, 
that isn't yet part of CF. Instead of coming up with N standard names 
for the quality data, use the standard name 'status_flag' 
<http://mmisw.org/cfsn/#/status_flag> on this variable and come up with 
a new attribute that could be added to CF that would encode the 
particulars of how the index is calculated.

Grace and peace,

Jim

On 10/11/17 9:01 AM, Heather Brown - NOAA Affiliate wrote:
> To clarify Brian is looking to use the name below.
>> *New Name*: radar_quality_index_from_beam_blockage_and_vpr
>  Per  the first email
> *Description*: the quality of a ground-based radar based on the 
> combined measure of beam blockage and the effects of a vertical 
> profile of reflectivity.
> *Unit*: 1 (dimensionless)
>
> This particular file doesn't have the ability to be an ancillary 
> variable due to being the only variable that is not a coordinate 
> variable. Ideally, we would have this setup to make it clearer to 
> users and might happen in the future. At this time this is common 
> practice for this variable to be in a stand-alone file
> There are other "index" standard names. Do you need more information 
> to understand if it can be comparable across different radars/data 
> sources? Brian, maybe you can elaborate on the standard practice of 
> this index and how other radars/data sources can compare the same 
> information.
>
> Hope this helps.
>
> Heather Brown
> Meteorological Archive Specialist - ERT - Federal Government Contractor
> NOAA's NationalCenters for Environmental Information (NCEI)
> 151 Patton Ave.
> Asheville, NC 28801-5001 USA
> heather.brown at noaa.gov <mailto:heather.brown at noaa.gov>
> Voice: +1 828-271-4863 <tel:%2B1%20828-271-4863>Fax: +1 828-271-4328 
> <tel:%2B1%20828-271-4328>
>
> The newly formed NCEI merges the National Climatic Data Center (NCDC), 
> the National Geophysical Data Center (NGDC), and the National 
> Oceanographic Data Center (NODC).
> //
> /Facebook: http://www.facebook.com/NOAANationalClimaticDataCenter 
> Twitter: @NOAANCDC @NOAAOceanData/
>
> On Tue, Oct 10, 2017 at 11:19 AM, Brian Nelson - NOAA Federal 
> <brian.nelson at noaa.gov <mailto:brian.nelson at noaa.gov>> wrote:
>
>     radar_quality_index_from_beam_blockage_and_vpr
>     will work as suggested by mike dixon
>
>     On Tue, Oct 10, 2017 at 10:58 AM, Heather Brown - NOAA Affiliate
>     <heather.brown at noaa.gov <mailto:heather.brown at noaa.gov>> wrote:
>
>         I defer to Brian Nelson to answer the variable intent and
>         creation.
>         I do know this is for creating and improving a Climate Data
>         Record dataset.
>
>
>         Heather Brown
>         Meteorological Archive Specialist - ERT - Federal Government
>         Contractor
>         NOAA's NationalCenters for Environmental Information (NCEI)
>         151 Patton Ave.
>         <https://maps.google.com/?q=151+Patton+Ave.+Asheville,+NC+28801&entry=gmail&source=g>
>         Asheville, NC 28801
>         <https://maps.google.com/?q=151+Patton+Ave.+Asheville,+NC+28801&entry=gmail&source=g>-5001
>         USA
>         heather.brown at noaa.gov <mailto:heather.brown at noaa.gov>
>         Voice: +1 828-271-4863 <tel:%2B1%20828-271-4863>Fax: +1
>         828-271-4328 <tel:%2B1%20828-271-4328>
>
>         The newly formed NCEI merges the National Climatic Data Center
>         (NCDC), the National Geophysical Data Center (NGDC), and the
>         National Oceanographic Data Center (NODC).
>         //
>         /Facebook:
>         http://www.facebook.com/NOAANationalClimaticDataCenter
>         <http://www.facebook.com/NOAANationalClimaticDataCenter>
>         Twitter: @NOAANCDC @NOAAOceanData/
>
>         On Tue, Oct 10, 2017 at 9:39 AM, Nan Galbraith
>         <ngalbraith at whoi.edu <mailto:ngalbraith at whoi.edu>> wrote:
>
>
>             Maybe instead of ' radar_quality_index' NCEI could use a
>             more general
>             approach; an ancillary variable of radar_qc, and then a
>             standard attribute
>             that describes how the  QC variable is calculated.
>
>             As far as I know there's no way, currently, to provide
>             such a description in
>             a way that would be clear to data users, but this approach
>             would avoid a
>             proliferation of quality_index standard names.
>
>             I don't know about different radar systems, but a very
>             similar concept could be
>             applied to ADCP data, perhaps by combining echo amplitude
>             and percent good
>             to get a more 'complete' QC variable. We don't routinely
>             do that, but it might be
>             useful, if we had a standard way to document the meaning
>             of the resulting QC
>             value and the way it was calculated.
>
>             Cheers - Nan
>
>
>             On 10/5/17 1:00 PM, Jim Biard wrote:
>
>
>                 Hi.
>
>                 There needs to be a full definition of the quantity
>                 that is more precise than the sentence below. Keep in
>                 mind that not every quantity needs a standard name. I
>                 have one question in particular. Is this a quantity
>                 that is comparable across different radars?
>
>                 Grace and peace,
>
>                 Jim
>
>
>                 On 10/5/17 12:21 PM, Heather Brown - NOAA Affiliate wrote:
>
>                     Folks,
>
>                     Are there any opinion and/or thoughts to adding
>                     this standard name?
>
>                     Thanks,
>                     H
>
>                     Heather Brown
>
>
>                     On Tue, Sep 5, 2017 at 4:58 PM, Brian Nelson -
>                     NOAA Federal <brian.nelson at noaa.gov
>                     <mailto:brian.nelson at noaa.gov>
>                     <mailto:brian.nelson at noaa.gov
>                     <mailto:brian.nelson at noaa.gov>>> wrote:
>
>                         I would like to request a standard name for a
>                     variable that
>                         defines the quality of a ground based radar
>                     based on the combined
>                         measure of beam blockage and the effects of
>                     vertical profile of
>                         reflectivity.
>
>                         There is no such standard name available nor
>                     does an existing one
>                         meet the requirements.
>
>                         The name should be: radar_quality_index
>                         Units : dimensionless (1)
>
>                         Thanks
>                         Brian
>
>
>
>
>
>             -- 
>             *******************************************************
>             * Nan Galbraith        Information Systems Specialist *
>             * Upper Ocean Processes Group Mail Stop 29 *
>             * Woods Hole Oceanographic Institution               *
>             * Woods Hole, MA 02543 (508) 289-2444
>             <tel:%28508%29%20289-2444> *
>             *******************************************************
>
>
>
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