Dynamic Height:

Dynamic heights are computed from temperature profiles 
by vertically integrating the specific volume anomaly
from the surface to 500 m depth. This produces a dynamic
height at the sea surface referenced to 500 decibars (0/500db).

Details of Dynamic Height Calculation

The specific volume anomaly (steric anomaly) is based on a
1980 equation of state for seawater and 1978 practical 
salinity scale (Millero, et al (1980) Deep-Sea Res., 27a, 255-264
Millero and Poisson 1981, Deep-Sea Res., 28a, pp 625-629).
The salinity data input into the specific volume anomaly calculation
are a set of long-term mean temperature-salinity relations, 
one for each array location, derived from the World Ocean Atlas 
(see Conkright et al 2002: "World Ocean Atlas 2001: Objective Analyses,
Data Statistics, and Figures, CD Rom documentation", National 
Oceanographic Data Center, Silver Spring, MD).

In ascii format files, to the right of the data, you will 
find data quality codes which use the definitions below. 
Using these codes you can tune your analysis to trade-off 
between quality and temporal/spatial coverage. 

Quality Code Definitions:

0 = datum missing

1 = highest quality; Pre/post-deployment calibrations agree to within
sensor specifications.  In most cases only pre-deployment calibrations have
been applied

2 = default quality; Pre-deployment calibrations applied.  Default
value for sensors presently deployed and for sensors which were either not
recovered or not calibratable when recovered.

3 = adjusted data; Pre/post calibrations differ, or original data do
not agree with other data sources (e.g., other in situ data or climatology),
or original data are noisy.  Data have been adjusted in an attempt to
reduce the error.

4 = lower quality; Pre/post calibrations differ, or data do not agree
with other data sources (e.g., other in situ data or climatology), or data
are noisy.  Data could not be confidently adjusted to correct for error.

5 = sensor or tube failed