Accession Number:

ADA275350

Title:

Evaluation of the Sparton Tight-Tolerance AXBT

Descriptive Note:

Journal article (Final)

Corporate Author:

NAVAL RESEARCH LAB STENNIS SPACE CENTER MS

Personal Author(s):

Report Date:

1993-12-01

Pagination or Media Count:

9.0

Abstract:

Forty-six near-simultaneous pairs of conductivity-temperature-depth CTD and Sparton tight tolerance air expendable bathythermograph AXBT temperature profiles were obtained in summer 1991 from a location in the Sargasso Sea. The data were analyzed to assess the temperature and depth accuracies of the Sparton AXBTs. The tight-tolerance criterion was not achieved using the manufacturers equations but may have been achieved using customized equations computed from the CTD data. The temperature data from the customized equations had a one standard deviation error of 0.13 deg C. A customized elapsed fall time-to-depth conversion equation was found to be z 1,620t- 2.2384 x 10exp-4t2 1.291 X 10exp-7t to the 3rd, with z the depth in meters and t the elapsed fall time after probe release in seconds. The standard deviation of the depth error was about 5 m a rule of thumb for estimating maximum bounds on the depth error below 100 m could be expressed as or - 2 of depth or or - l0 m, whichever is greater. This equation gave greater depth accuracy than either the manufacturers supplied equation or the Navy standard equation.

Subject Categories:

  • Physical and Dynamic Oceanography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE