User`s manual

Appendix IV: Derived Parameter Formulas

Descent rate and acceleration computed by SEASAVE and SBE Data

Processing’s Data Conversion module are somewhat different from values

computed by SBE Data Processing’s Derive module, because the algorithms

calculate the derivative of the pressure signal with respect to time, using a

linear regression to determine the slope. SEASAVE and Data Conversion

compute the derivative looking backward in time, since they share common

code and SEASAVE cannot use future values of pressure while acquiring data

in real time. Derive uses a centered window (equal number of points before

and after the scan; time window size is user-input) to obtain a better estimate

of the derivative. Use SEASAVE and Data Conversion to obtain a quick look

at descent rate and acceleration; use Derive to obtain the most accurate values.

oxygen [ml/l] = (As applicable, see Application Note 64: SBE 43 Dissolved

Oxygen Sensor or Application Note 13-1: SBE 13, 23, 30 Dissolved Oxygen

Sensor Calibration & Deployment)

(Oxygen computed by SEASAVE and SBE Data Processing’s Data

Conversion module is somewhat different from values computed by SBE Data

Processing’s Derive module, because the algorithm calculates the derivative of

the oxygen signal with respect to time, using a linear regression to determine

the slope. SEASAVE and Data Conversion compute the derivative looking

backward in time, since they share common code and SEASAVE cannot use

future values of oxygen while acquiring data in real time. Derive uses a

centered window [equal number of points before and after the scan; window

size is user-input] to obtain a better estimate of the derivative. Use SEASAVE

and Data Conversion to obtain a quick look at oxygen values; use Derive to

obtain the most accurate values.)

oxygen [

moles/kg] = oxygen [ml/l]

Corrected Irradiance [CPAR] =

100 * ratio multiplier * underwater PAR / surface PAR [%]

(Ratio multiplier = scaling factor used for comparing light fields of disparate

intensity, input in .con file entry for surface PAR sensor;

Underwater PAR = underwater PAR data;

Surface PAR = surface PAR data)

Sigma-theta + 1000

44660

Note:

For complete description of ratio

multiplier, see Application Note

11S (SBE 11plus Deck Unit) or

47 (SBE 33 or 36 Deck Unit).