IOEB Archived Data Distribution

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.  Following are links to the files with the complete yearly archives for each IOEB in two formats.  

                                                                                                                   DOS                       UNIX
1992 Beaufort Gyre IOEB output data from 1992                         b92_92.zip        b92_92.tar.Z
1992 Beaufort Gyre IOEB output data from 1993                         b92_93.zip        b92_93.tar.Z
1992 Beaufort Gyre IOEB output data from 1994                         b92_94.zip        b92_94.tar.Z
1992 Beaufort Gyre IOEB output data from 1995                         b92_95.zip        b92_95.tar.Z

1994 Transpolar Drift IOEB output data from 1994                      t94_94.zip         t94_94.tar.Z

1996 Beaufort Gyre IOEB output data from 1996                         b96_96.zip        b96_96.tar.Z
1996 Beaufort Gyre IOEB output data from 1997                         b96_97.zip        b96_97.tar.Z

1997 Beaufort Gyre IOEB output data from 1997                         b97_97.zip        b97_97.tar.Z
1997 Beaufort Gyre IOEB output data from 1998                         b97_98.zip        b97_98.tar.Z

1997 SHEBA IOEB output data from 1997                                   s97_97.zip        s97_97.tar.Z
1997 SHEBA IOEB output data from 1998                                   s97_98.zip        s97_98.tar.Z

Alternately, log on and get the compressed files using FTP:

ftp> ioeb.whoi.edu (or 128.128.16.244)

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 .

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

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