Re: [cf-satellite] Sharing quality flags among multiple variables

• To: "rhorne@xxxxxxxxxxxxxxxxx" <rhorne@xxxxxxxxxxxxxxxxx>
• Subject: Re: [cf-satellite] Sharing quality flags among multiple variables
• From: "Armstrong, Edward M (388M)" <Edward.M.Armstrong@xxxxxxxxxxxx>
• Date: Tue, 1 Nov 2011 08:42:04 -0700

Hello:

On Oct 31, 2011, at 12:12 PM, Randy Horne wrote:

> 
> 
> The current CF conventions dictate that quality flags are attached to 
> specific variables.  The implication is that comforming with CF conventions 
> would require the same quality flags to be stored multiple times in our 
> NetCDF product files.  

One observation here:

We've seen multiple examples of storing a quality flag variable ONCE in a 
netCDF file while remaining CF compliant.  If  the quality flagging is relevant 
to multiple variables within the netCDF file, why not use a "comment:"  
attribute in the quality variable to describe exactly which variables the 
quality flagging is relevant for ?

-ed

Ed Armstrong
JPL Physical Oceanography DAAC
818 519-7607

• References:
  • [cf-satellite] Sharing quality flags among multiple variables
    • From: Randy Horne