[Seavox] A question of principle on instruments

[Lowry, Roy K.]

Hi John,

I must admit that I don't actually know - I've only ever deployed an XBT once and that was in the 90s.  The manufacturer's equations are certainly applied by the Sippican deck unit as it downloads temperature versus depth. I also know for certain that the modified equations have been applied by recalibration post-processing. However, I don't know whether anybody has updated the deck unit firmware (which would be fairly easy as the difference is just coefficient values) to use the updated equations.

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!

From: John Graybeal [mailto:john.graybeal at marinexplore.com]
Sent: 08 November 2013 15:59
To: Lowry, Roy K.
Cc: seavox at mailman.nerc-liv.ac.uk
Subject: Re: [Seavox] A question of principle on instruments

Can you say more about where and why the fall rate equation is applied?  (Within the instrument or not, permanent or not, affects the instrument's operation how?)

John

On Nov 8, 2013, at 07:38, "Lowry, Roy K." <rkl at bodc.ac.uk<mailto:rkl at bodc.ac.uk>> wrote:


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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