[Seavox] A question of principle on instruments

[Greg Reed]

Roy

I would steer clear of differentiating probes based on fall-rate equations.

XBT biases are a function of the year of manufacture and this would 
require duplicate entries for some probes with the different fall-rate 
coefficients. The user would then need to know which coefficients 
applied to a given instrument.

One option would be to add a note in the definition section of L22 to 
refer to WMO common Code table C3 which lists fall rate equation 
coefficients for profile measurement instruments.

regards, Greg

>
> From: *Lowry, Roy K.* <rkl at bodc.ac.uk <mailto:rkl at bodc.ac.uk>>
> Date: 9 November 2013 02:38
> Subject: [Seavox] A question of principle on instruments
> To: "seavox at mailman.nerc-liv.ac.uk 
> <mailto:seavox at mailman.nerc-liv.ac.uk>" <seavox at mailman.nerc-liv.ac.uk 
> <mailto:seavox at mailman.nerc-liv.ac.uk>>
>
>
> Dear All,
> An issue is arising with a request to add a set of additional XBT 
> entries to the SeaVoX instrument vocabulary (L22).  In most cases, 
> this includes two entries for certain physical types of XBT (e.g. 
> Sippican T5) with the entries differentiated by the fall-rate equation 
> applied (Sippican or GOOS). I'm a little uneasy about this as to me it 
> could be viewed as shoe-horning information that isn't actually 
> instrument type into the instrument description. However, I am also 
> aware of instruments that have multiple designations and all that's 
> different between the variants is the firmware.
> Anybody else have any views on this?
> Cheers, Roy.
> Please note that I now work part-time from Tuesday to Thursday.  
> E-mail response on other days is possible but not guaranteed!
>
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