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Archived data

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Related Files

» 1992 Beaufort Gyre IOEB output data from 1992
ZIP file [1.4MB]

» 1992 Beaufort Gyre IOEB output data from 1993
ZIP file [1.9MB]

» 1992 Beaufort Gyre IOEB output data from 1994
ZIP file [1.3MB]

» 1992 Beaufort Gyre IOEB output data from 1995
ZIP file [1MB]

» 1992 Beaufort Gyre IOEB output data from 1996
ZIP file [0.5MB]

» 1996 Beaufort Gyre IOEB output data from 1996
ZIP file [1.5MB]

» 1996 Beaufort Gyre IOEB output data from 1997
ZIP file [1.3MB]

» 1997 Beaufort Gyre IOEB output data from 1997
ZIP file [2.6MB]

» 1997 Beaufort Gyre IOEB output data from 1998
ZIP file [2.0MB]

» 1997 SHEBA IOEB output data from 1997
ZIP file [0.5MB]

» 1997 SHEBA IOEB output data from 1998
ZIP file [1.2MB]

» 1992 Transpolar Drift IOEB output data from 1992
ZIP file [0.1MB]

» 1994 Transpolar Drift IOEB output data from 1994
ZIP file [1.1MB]

Data Processing


The processing software was conceived specifically to process data from IOEBs, employing basic processing functions in individual modules designed for expandability to handle future systems requirements. Input files of ARGOS hexadecimal data is processed by dividing the location, or buoy drift data, from the sensor data, and treating each set separately, for each buoy. The location data consists of ARGOS quality 2 or 3 positions from each PTT on a particular IOEB, which are subsequently screened, interpolated, and combined with similarly processed locations from the other PTT, and further smoothed with a 6-hr triangular filter to produce an hourly timeseries with a standard error we calculated to be ~150 m. The sensor data is prefiltered, combined, adjusted for buoy drift, and screened with a Gaussian first difference filter to produce unevenly spaced timeseries of each environmental or physical variable measured by the IOEB. Every variable is output to a unique file per year, per buoy consisting of a two-column timeseries. This format allows for easy data exchange, and facilitates visual output using the GMT-SYSTEM plotting tools. A full description of the processing scheme, a description of field operations, and plots of the data are available in WHOI Technical Report 99-12.

Output data availability


Data files are available in both tar.Z and zip formats for compatability with both UNIX and PC systems.  Click on the links to the right of the page to download complete yearly archives for each IOEB.

Alternately, log on and get the compressed files using FTP: ftp://ioeb.whoi.edu

ftp> ioeb.whoi.edu
ftp> User: anonymous
ftp> cd zip (or tar, or src)
ftp> bin
ftp> get “filename”
ftp> bye


Output Data Filenames


Most of the individual uncompressed output files are two column files where the first column contains the decimal day of the year, and the second column the variable measurement.

        Filename = prefix + yy (s) . ext
                    where prefix is defined below
                    yy = two number year
                    s = subscript c for drift corrected, r for recovered data, s for screened data, t for temporary
                    ext = buoy id extension

Example: a0e1_92c.b92 = 92 BGY IOEB: drift corrected ADCP/DPM 0, bin 1, east vector for 1992

Pre
Sensor/Environmental Variable Units 
aXbf_ ADCP/DPM X: bin flag bit 
aXct_ ADCP/DPM X: counter bit
aXeN_ ADCP/DPM X: raw east vector for bin N cm/s
aXen_
ADCP/DPM X: ensembles
number
aXhv_ ADCP/DPM X: heading variability
deg
aXqN_ ADCP/DPM X: status bit N bit
aXnN_
ADCP/DPM X: raw north vector for bin N cm/s
aXt_ 
ADCP/DPM X: temperature deg C
aXtv_
ADCP/DPM X: tilt variability deg
aXvN_
ADCP/DPM X: vertical vector for bin N cm/s
aXxN_ ADCP/DPM X: error bit N
bit
comp_ Apex compass = MHE + DECL deg
conN_ MCU controller N battery voltage 
V
decl_
Geomagnetic declination derived from locations deg
drift_
Drift track (lon, lat)
deg, deg
fl_ 
Fluorometry at 110 m V
ibv_ ICE: battery voltage V
iday_ ICE: day code number
iech_ ICE: echo sounder m
ihr_ ICE: hour code number 
isNa_ ICE: stress sensor N, sigma-1 kPa
isNb_ ICE: stress sensor N, sigma-2 kPa 
itN_ ICE: temperature sensor N deg C
lat_ Drift latitude timeseries deg
lon_ Drift longitude timeseries 
deg
mat_ 
MET: air temperature deg C
mbar_ 
MET: barometric pressure hPa
mbv_ MET: battery voltage 
V
mday_ MET: day code number
mhe_ MET: raw compass heading 
deg
mhr_ 
MET: hour code number
mtav_ MET: average tensiometer 
lbs
mtmx_ MET: maximum tensiometer lbs
mtst_ MET: std of tensiometer lbs
mtx_ MET: apex tilt x deg
mty_ MET: apex tilt y deg
mwd_ MET: raw wind speed m/s
mws_ MET: raw wind direction deg
pttN_ MET: raw compass heading V
s4c_ S4: raw conductivity mmho
s4d_ S4: raw sigma-t 
 
s4e_ 
S4: raw east vector 
cm/s
s4n_ S4: raw north vector cm/s
s4s_ S4: raw salinity PSU
s4t_ S4: raw temperature 
deg C
scNc_ Seacat N: raw conductivity mmho
scNd_ Seacat N: raw sigma-t 
 
scNs_ Seacat N: raw salinity PSU
scNt_ Seacat N: raw temperature 
deg C
scdo_ 
Seacat dissolved oxygen  
scfl_ Fluorometry at Seacat V
st_ Sediment trap status 
number
tr_ 
Transmissometry at 110 m %
ud_ Processed buoy/ice direction 
deg
ue_ Processed buoy/ice east vector cm/s
un_ Processed buoy/ice north vector cm/s
us_ Processed buoy/ice speed cm/s
uvec_ Processed buoy/ice plot vectors  
vd_ 
Processed 110 m direction deg
ve_ Processed 110 m east vector cm/s
vn_ Processed 110 m north vector 
cm/s
vs_ Processed 110 m speed cm/s
vvec_ 
Processed 110 m plot vectors  
wd_ 
Processed wind direction deg
we_ Processed wind east vector m/s
wn_ 
Processed wind north vector 
m/s
ws_ Processed wind speed 
m/s
wtse_ Water transfer system event number
wtss_ 
Water transfer system status 
number
wvec_
Processed wind plot vectors
 


IADP Processing Files


A complete description of the IADP processing scheme, all the source code and command files, postscript files of plots of the data, and descriptive text and drawings programs are also available for downloading from the src directory.

ftp://ioeb.whoi.edu

iadp_cmd.zip/tar.Z All IOEB .exe and .cmd files

iadp_src.zip/tar.Z C source code for IADP .exe programs


Contact


Rick Krishfield
Department of Geology & Geophysics
Woods Hole Oceanographic Institution
Clark 128 - MS 23
Woods Hole, MA 02543-1541
Phone: (508) 289-2849
Fax: (508) 457-2175
e-mail: rkrishfield@whoi.edu


Last updated: March 12, 2011
 


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