Relative Humidity:

Relative humidity first became available in the TAO 
array in 1989, and has been a standard measurement on
ATLAS moorings since then. Relative humidity is in units
of percent.

ATLAS buoys used in TAO and PIRATA measure relative humidity 
at a height of 3 m above mean sea level. TRITON buoys replaced 
ATLAS buoys in the Pacific west of 160E beginning in 1999.  
TRITON buoys measure relative humidity at 2.2 m above mean 
sea level. 

In ascii files organized by site, these height differences
are explicitly distinguished. In files containing both ATLAS
and TRITON data, the ATLAS height is used. (Instrument height 
in the data files is shown as a negative depth).

For detailed information about TAO and PIRATA sampling and
sensors, see these two web pages:

   http://www.pmel.noaa.gov/tao/proj_over/sensors.shtml

   http://www.pmel.noaa.gov/tao/proj_over/sampling.html

For general information about the TAO Array, see

McPhaden, M.J., A.J. Busalacchi, R. Cheney, J.R. Donguy,
K.S. Gage, D. Halpern, M. Ji, P. Julian, G. Meyers,
G.T. Mitchum, P.P. Niiler, J. Picaut, R.W. Reynolds,
N. Smith, K. Takeuchi, 1998: The Tropical Ocean-Global
Atmosphere (TOGA) observing system: A decade of
progress. J. Geophys. Res., 103, 14,169-14,240.
   http://www.pmel.noaa.gov/pubs/outstand/mcph1720/abstract.shtml

For general information about PIRATA, see

Servain, J., A.J. Busalacchi, M.J. McPhaden, A.D. Moura,
G. Reverdin, M. Vianna, and S.E. Zebiak, 1998: A Pilot
Research Moored Array in the Tropical Atlantic (PIRATA).
Bull. Am. Meteorol. Soc., 79, 2019-2031.

For information about the TAO/TRITON collaboration, see
   http://www.pmel.noaa.gov/tao/proj_over/triton.html

In ascii format files, you will find data quality codes
to the right of the data which use the definitions 
below. In NetCDF format files, you will find a quality 
variable with the same shape as the data. 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 to correct for 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