Dropsonde Data Collected During the TOGA COARE Intensive ObservingPeriod (IOP) from the NASA DC-8 and NOAA P3Entry ID: COARE_lsa_dropsondes
Abstract: The TOGA COARE Data Information System distributes all TOGA COARE
Dropsonde data are available from the UCAR/JOSS CODIAC system through
the WWW (World Wide Web)/CODIAC interface at
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.
Two LOD2 dropsonde data systems each were installed on the NASA DC8
and on one of the NOAA P3s. Overall 110 LOD2 (Omega) dropsondes were
deployed during TOGA COARE, 30 dropsondes from the NOAA P3 and 80 from
the NASA DC8.
The NCAR Lightweight Omega Digital Dropsonde (LOD2) contains an Omega
receiver, a 400 MHz transmitter and a microprocesser which processes
and formats thermodynamic data from sensors for transmission to the
aircraft. The aircraft portion of the dropwindsonde system consists
of a 400 MHz telemetry receiver, a thermodynamic data processor, an
onboard 486 PC, and a Trimble Mini Omega (TMO) Model 8402 navigator.
The dropwindsonde system measures thermodynamic parameters (pressure,
temperature, humidity), horizontal wind, and position.
An Omega sounding initiated from an altitude of 40,000 ft (12.2 km)
typically takes about 35 to 27 minutes before it splashes into the
ocean and ceases transmission. Nominal sonde descent velocities are
about 12 to 13 m/sec at high altitude and 5 to 6 m/sec at the surface.
In TOGA COARE, the drop rate was usually irregular.
SUMMARY OF DROPSONDE FLIGHTS: (number of LOD2 soundings in parentheses)
6 Nov (2), 14 Nov (1), 19 Nov (3), 12 Dec (1), 13 Dec (3), 15 Dec (1)
6 Feb (4), 9 Feb (1), 19 Feb (2), 21 Feb (1), 23 Feb (2)
6 Jan (1), 11 Jan (2), 12 Jan (3), 18 Jan (4), 19 Jan (5), 26 Jan (4),
1 Feb (3), 4 Feb (14), 6 Feb (11), 8 Feb (5), 10 Feb (5), 17 Feb (6),
20 Feb (4), 21 Feb (1), 22 Feb (4), 23 Feb (4), 24 Feb (1)
For each individual drop, three different ASCII files were produced. Each
file has a header section identifying the data file type as
"raw thermodynamic data", "ten-second" data and "interpolated data".
The header section also provides information regarding the particular
drop and its processing.
For a detailed description of the instrument, the data, etc., request
the hard-copy report "TOGA COARE Dropsonde Data Report", from the TOGA
COARE International Project Office.
Please contact Dean Lauritsen or Erik Miller for further questions.
Start Date: 1992-11-01Stop Date: 1993-02-28
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > TRACE GASES/TRACE SPECIES
ATMOSPHERE > ATMOSPHERIC PRESSURE > ATMOSPHERIC PRESSURE MEASUREMENTS
ATMOSPHERE > ATMOSPHERIC TEMPERATURE > AIR TEMPERATURE
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > HUMIDITY
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR > HUMIDITY
ATMOSPHERE > ATMOSPHERIC WINDS > CONVECTION
ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS
ATMOSPHERE > ATMOSPHERIC WINDS > UPPER LEVEL WINDS
ATMOSPHERE > PRECIPITATION > PRECIPITATION AMOUNT
OCEANS > OCEAN WINDS > SURFACE WINDS
Distribution Media: online ftp (compressed, tar)
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
Phone: (804) 979-3571
Department of Environmental Sciences University of Virginia Clark Hall
Province or State: VA
Postal Code: 22901
Role: TECHNICAL CONTACT
Phone: (303) 497-8772
Email: lauritsn at ncar.ucar.edu
NCAR/ATD P.O. Box 3000
Province or State: CO
Postal Code: 80307
Phone: (409) 862-4171
Fax: (409) 862-4466
Email: zipser at ariel.tamu.edu
Department of Meteorology Texas A&M University
City: College Station
Province or State: TX
Postal Code: 77843-3150
E. Miller, TOGA COARE Dropsonde Data Report, August 1993.
Scientific Plan for the TOGA Coupled Ocean-Atmosphere Response
Experiment, WCRP Publications Series, No. 3 Addendum, World Climate
TOGA COARE Operations Plan, Working Version September 1992, TOGA COARE
... International Project Office.
TOGA COARE Intensive Observing Period Operations Summary, TOGA COARE
International Project Office, University Corporation for Atmospheric
Summary Report of the TOGA COARE International Data Workshop,
Toulouse, France, 2 - 11 August 1994, TOGA COARE International Project
Office, University Corporation for Atmospheric Research, 170 pages.
Creation and Review Dates
Last DIF Revision Date: 2009-05-11