Acoustic Doppler Current Profiler (ADCP) Measurements Taken by COARE Research Vessels During the TOGA COARE Intensive Observing Period (IOP)Entry ID: COARE_ocmix_adcp
Abstract: DATA ACCESS
The ADCP data can be obtained from the Shipboard ADCP Center (SAC) at
the University of Hawaii at the URL
http://ilikai.soest.hawaii.edu/sadcp/ or via anonymous FTP
CODAS (Common Oceanographic Data Analysis System ) source code,
libraries, executables, documentation and demo, archived as codas3.exe
(PC version) and codas3.tar.Z (Sun4 version), are ... available via
anonymous FTP (noio.soest.hawaii.edu) in subdirectory pub/codas3.
TOGA COARE data is available from the TOGA COARE Data Information System
http://www.ncdc.noaa.gov/oa/coare/index.html, the NOAA National
Oceanographic Data Center http://www.nodc.noaa.gov, and the National
Center for Atmospheric Research (NCAR) in Boulder, CO
TOGA COARE was a multidisciplinary, international research effort that
investigated the scientific phenomena associated with the interaction
between the atmosphere and the ocean in the warm pool region of the
western Pacific. The field experiment phase of the program took place
from 1 November 1992 through 28 February 1993 and involved the
deployment of oceanographic ships and buoys, several ship and land-
based Doppler radars, multiple low and high-level aircraft equipped
with Doppler radar and other airborne sensors, as well as a variety of
surface based instruments for in situ observations.
SHIPBOARD ADCP CENTER (SAC) AT THE UNIVERSITY OF HAWAII
The NODC established the SAC at the TOGA Sea Level Center at the
University of Hawaii for the acquisition, review, documentation,
archival, and distribution of shipboard ADCP datasets. These
high-density datasets, which have been passed through quality control,
calibration, and navigation stages, are placed in the so-called
"CODAS" format. The datasets are then reviewed, reduced to a standard
subset, documented, and backed up. Datasets are periodically passed
on to NODC headquarters, which acts as the final repository.
ADCP DATA COLLECTION METHODOLOGY
The hull-mounted ADCP estimates horizontal and vertical velocity as a
function of depth by using the Doppler effect to measure the radial
relative velocity between the instrument and scatterers in the ocean.
Three acoustic beams in different directions are the minimal
requirement for measuring the three velocity components. A fourth beam
adds redundancy and an error estimate. The ADCP transmits a ping from
each transducer element roughly once per second. The echo arrives back
at the instrument over an extended period, with echoes from shallow
depths arriving sooner than ones from greater ranges. Profiles are
produced by range-gating the echo signal, which means the echo is
broken into successive segments called depth bins. These correspond
to successively deeper depth ranges. The operator configures the
length of each depth bin and transmit pulse, which determines the
degree of averaging in the vertical, depending on whether one is more
interested in vertical resolution or profile penetration. The noisy
velocity estimates from each ping are vector-averaged into 1- to
10-minute ensembles. The relative velocities are rotated from the
transducer's reference to the earth's reference frame using the ship's
gyrocompass. Finally, relative velocities and various ancillary
parameters are stored on the ship using a data acquisition system
(DAS). The DAS optionally records navigation information, such as
provided by the GPS. Specifics of the instrument capabilities and
configuration options are well documented (RDI, 1989).
Two types of shipboard ADCP data are available:
- Densely-sampled sets (10 MB per cruise-month) as CODAS binary
block files of the currents, and ancillary data at the interval with
which the data were recorded and processed.
- ASCII standard subsets of the currents, ship's speed, and
transducer temperatures at hourly and 10-m depth intervals.
For each cruise, a metadata file is prepared summarizing specifics
about the instrumentation, cruise activities, data processing, and
The standard ASCII subset and metadata files are maintained on-line in
an anonymous FTP area and are available free of charge. Data types,
metadata files, inventories, and cruise tracks can also be obtained
via conventional storage media (diskettes or DAT, eXabyte, or magnetic
tapes) for a fee. The densely-sampled dataset can be made available on
anonymous FTP on a case-by-case basis. In general, NODC products and
services are provided on a cost recovery basis. However, researchers
who submit data to NODC are eligible to receive NODC data on exchange.
For charges, consult the UHI/SAC URL
(http://ilikai.soest.hawaii.edu/sadcp/obtain.html) or contact
Patrick Caldwell (firstname.lastname@example.org).
Inventory - COARE Research Vessels
SAC_ID PLATFORM STARTDATE ENDDATE LON_RANGE LAT_RANGE PI
------ -------- --------- ------- --------- --------- --
00001 wecoma (w9211a) 92/11/08 92/12/08 144E-158E 2S-13N huyer
00002 wecoma (w9211b) 92/12/12 93/01/15 144E-158E 2S-13N hacker
00003 wecoma (w9211c) 93/01/23 93/02/17 149E-158E 2S-9N hacker
00004 moana (mw9218) 92/10/27 92/12/07 144E-157W 1S-21N gregg
00005 noroit (coare-poi) 92/12/02 93/02/28 152E-166E 22S-7N eldin
00006 moana (mw9301) 93/01/22 93/02/21 144E-156E 1S-13N gregg
00007 moana (mw9302) 93/03/03 93/03/31 144E-170E 7S-13N lukas
00012 moana (mw9219) 92/12/13 93/01/16 144E-156E 1S-13N moum
00036 moana (mw9411) 94/04/11 94/05/11 137E-165E 8S-13N lukas
00037 moana (mw9205) 92/04/17 92/05/14 136E-171E 3S-13N lukas
00078 franklin (fr0992) 92/11/18 92/12/16 147E-156E 18S-1S godfrey
00079 franklin (fr0193) 93/01/08 93/02/08 146E-157E 18S-1S godfrey
00084 xiang (xyh5_leg1) 92/11/06 92/12/01 154E-159E 6S-1S pu
00085 xiang (xyh5_leg2) 92/12/14 93/01/08 154E-159E 7S-1S pu
00086 xiang (xyh5_leg3) 93/01/23 93/02/22 144E-155E 2S-12N pu
00087 shiyan3 (sy3l1(leg1)) 92/11/07 92/12/13 154E-160E 7S-1S chou
00088 shiyan3 (sy3l2(leg2)) 92/12/16 93/01/24 157E-160E 9S-2S chou
00089 shiyan3 (sy3l3(leg3)) 93/01/28 93/02/19 154E-160E 9S-1S chou
moana = Moana Wave
noroit = Le Noroit
xiang = Xiangyanghong #5
Information available within the NODC/SAC anonymous FTP area:
INVENTORY Inventory lists, cruise track plots.
DATABASE Standard subsets, cruise tracks, and
cruise summary files for each cruise.
BIRS Browse, Inventory, and Retrieval Software.
Available for public queries of global
GEN_DOC General documentation and overview.
ASC_DUMP Software for ASCII dump of CODAS dataset.
CODAS_MN 1) a compressed post-script "rough draft"
of processing manual and 2) "second draft"
of NODC's access to high-resolution CODAS
shipboard ADCP data.
SUBMIT ATTENTION DATA CONTRIBUTORS:
Metadata are invaluable, to assist in
preparation for your submission, see
this subdirectory for a blank form and an example.
SAMP_SUB Sample files for NODC subset.
ESM Article for NOAA's Earth System Monitor.
xfer_dat Working area for data transfer.
Filenames are as follows:
read_1st.doc This file explains file names.
size.lis A summary of file sizes within transfer
subdirectory -- we suggest you download
this file first to estimate transfer time.
std_sub.doc Standard subset format description.
cru_trk.doc Cruise track format description.
dist_pol.doc NODC shipboard ADCP distribution policy.
*.inv Inventory file.
sssss.sub Standard subset (hourly and 10 m depth intervals
for U,V, transducer temp, and ship U, ship V,
for sac_id=sssss, ie. 00123.sub.
sssss.bft Cruise summary, or block footer as we call it.
sssss.cru Cruise track at hourly intervals.
sssss.def Producer definition file, used during conversion
of CODAS binary dataset from one machine type
to another using CODAS utility mkblkdir.
sssssnnn.blk CODAS block nnn for cruise sssss.
sssssdir.blk CODAS block directory for cruise sssss.
For more information, please contact Pat Caldwell at the University of
Start Date: 1992-11-07Stop Date: 1994-05-11
Distribution Media: On-line, Off-line
Role: DIF AUTHOR
Phone: (303) 497-2061
Email: baeuerle at ucar.edu
UCAR/TOGA COARE International Project Office 3300 Mitchell Lane, Suite 380
Province or State: CO
Postal Code: 80301
Role: TECHNICAL CONTACT
Phone: (61) 02-32-5302
Fax: (61) 02-24-0530
Email: butt at aqueous.ml.csiro.au
CSIRO/Division of Oceanography Castray Esplanade GPO Box 1538
Province or State: TAS
Postal Code: 7001
Phone: (687) 26-0727
Fax: (687) 26-4326
Email: eldin at noumea.orstom.nc
Centre ORSTOM GROUPE SURTROPAC B.P. A5
City: Noumea Cedex
Postal Code: 98848
Country: NEW CALEDONIA
Phone: (86) 20-445-1335
Fax: (86) 20-445-1672
South China Sea Institute of Oceanology Academia Sinica 164 West Xingang Road
Postal Code: 510301
Phone: (61) 02-325210
Fax: (61) 02-240530
Email: godfrey at aqueous.ml.csiro.au
CSIRO/Division of Oceanography Castray Esplanade GPO Box 1538
Province or State: Tasmania
Postal Code: 7001
Phone: (206) 543-1353
Fax: (206) 543-6785
Email: gregg at apl.washington.edu
University of Washington Applied Physics Laboratory 1013 NE 40th St, HN-10
Province or State: WA
Postal Code: 98105
Phone: (808) 956-7896
Fax: (808) 956-9222
Email: rlukas at iniki.soest.hawaii.edu
HOT Physical Oceanography Department of Oceanography University of Hawaii at Manoa 1000 Pope Road
Province or State: Hawaii
Postal Code: 96822
Phone: (86) 532-287-9062
Fax: (86) 532-287-0882
Institute of Oceanology Chinese Academy of Sciences 7 Nanhai Road PEOPLE'S REPUBLIC OF CHINA
Province or State: Shandong
Postal Code: 266071
Phone: (86) 532-286-6810
Fax: (86) 532-287-9562
First Institute of Oceanography, SOA 13 Hongdao Road PRC
Province or State: Shandong
Postal Code: 266003
Delcroix, T., G. Eldin, C. Henin, F. Gallois, J. Grelet, M. Inall,
S. Keene, M.J. Langlade, C. Mekes, F. Masia, K. Richards, 1993:
Campagne COARE-POI a bord du N.O. Le Noroit 1er decembre 1992 - 2 mars
1993. Rapports de Missions, Sciences de la Mer, Oceanographie
Physique, No. 10, ORSTOM, Centre de Noumea, 338 pp.
Firing, E., 1992: Notes from Acoustic Doppler Current Profiler
Workshop at the National Oceanographic Data Center, May 14-15,
1992. "unpublished manuscript." (Copies available from P. Caldwell).
Pu, S., S. Jian, E. Zou, J. Zhan, K. Yeng, F. Yu and G. Zhang, 1993:
The TOGA-COARE Cruise of R/V Xiang Yang Hong #5, State Oceanic
Administration, China Ocean Press, 574 pp.
RD Instruments, 1989: Acoustic Doppler Current Profilers, Principles
of Operation: A Practical Primer. RD Instruments, 9855 Businesspark
Av., San Diego, CA 92131.
TOGA COARE International Project Office (TCIPO), 1992: TOGA COARE
Operations Plan, Working Version September 1992. University
Corporation for Atmospheric Research, Boulder, CO 80307, 138 pp.
TOGA COARE International Project Office (TCIPO), 1993: TOGA COARE
Intensive Observing Period Operations Summary. University Corporation
for Atmospheric Research, Boulder, CO 80307, 505 pp.
TOGA COARE International Project Office (TCIPO), 1994: Summary Report
of the TOGA COARE International Data Workshop, Toulouse, France, 2 -
11 August 1994, University Corporation for Atmospheric Research,
Boulder, CO 80307, 170 pp.
Webster, P.J., and R. Lukas, 1992: TOGA COARE: The Coupled Ocean-
Atmosphere Response Experiment. Bull. Am. Meteorol. Soc. 73, 1377-1416.
World Climate Research Programme (WCRP), 1985: Scientific Plan for the
TOGA Coupled Ocean-Atmosphere Response Experiment. WCRP Publications
Series, No. 3 Addendum, World Meteorological Organization, Geneva, 96 pp.
Creation and Review Dates
Last DIF Revision Date: 2003-12-18