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.
Descriptors:
Subject Categories:
- Physical and Dynamic Oceanography