NASA DC-8 Aircraft Navigation Data (DADS) for the TOGA COARE Intensive Observing PeriodEntry ID: COARE_cm_dc8.dads
Abstract: DATA ACCESS
The NASA/TOGA COARE Data Archive
The DADS data are archived at the NASA GSFC DAAC and are available via FTP
using the URL
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.
The NASA component of TOGA COARE, while contributing directly to
overall COARE objectives, emphasized scientific objectives associated
with the Tropical Rainfall Measuring Mission (TRMM) and NASA's cloud
and radiation program.
The DADS dataset contains DC-8 aircraft house-keeping data for flights
that took place in the Intensive Observing Period of TOGA-COARE.
The DC-8 DADS records and transfers over 50 parameters to experiment
computers in ASCII-format at 1-second intervals. The data transmission
is in one direction only to protect the main system from defective
experimental equipment or shorting of output lines. DADS data are
normally generated and recorded from soon after takeoff until shortly
The DADS dataset, stored at the NASA DAAC on the anonymous FTP site. It
is 60 MB in volume with a typical file size of 3 MB for the compressed
data from one flight, and a typical file size of 10 MB for the 1-second
ascii data from one flight, when uncompressed.
In the main directory ./ the files are:
README : similar to this file
flightfmt : Formats of 10-second flight navigation data files (text)
DADSparams.ps.Z : Description of the DADS parameters (PostScript)
DADSformat.ps.Z : Format of the 1-second ASCII data files (PostScript)
In a sub-directory ./9301XX the files are:
dc8_data.asc.Z : The full DADS ASCII 9600/19.2K baud serial dataset
9301XX.chk : Data analysis report for file dc8_data.asc.
md_log : The in-flight Mission Director's comment log.
9301XX.gif : A representative NOAA APT weather picture, captured during
or before each flight (Townsville local flights only).
dc8_data.bfl : 10-second flight data file for use by NASA Ames Airborne
Science Program track-mapping software on PCs.
dc8_data.flt : 10-second flight data file for use by NASA Ames Airborne
Science Program track-mapping software on UNIX systems.
map1.ps.Z : PostScript track plot of the entire flight.
map2.ps.Z : Same as map1.ps, with wind barbs.
map3.ps.Z, : More track plots, showing any data lines or areas of
map4.ps.Z... interest at a smaller scale and higher map resolution.
Number of these varies for each flight.
plots.ps.Z : PostScript plots of various DADS parameters vs. UT.
The DADS 1-second data files: The 1-second data, contained in the
dc8_data.asc files are written in an ascii compression format that
requires interpretation. A table describing the format of the data
files is in PostScript file DADSformat.ps. Descriptions of data
parameters are contained in PostScript file DADSparams.ps. Both of
these files reside in file f1_dat.tar.
File coord_flt_legs: This file, compiled by Ed Zipser, contains a list
of DC-8 legs that were near-simultaneous in coverage with the ER-2,
turboprops or both.
Read and Display Software: The DAAC distributes the following software
with the DADS data:
- extdads1.f: Fortran77 program extracts 19 selected data parameters
from the file dc8_data.asc (1-second DADS data) and outputs them in
character format to file dads1.
- extdads2.f: Fortran77 program converts the values in dads1. to their
proper units and outputs them as reals to file dads.
- extmach1.f: Fortran77 program extracts a (different) group of data
parameters from file dc8_data.asc and outputs them in character format
to file mach1.
- extmach2.f: Fortran77 program converts the values in mach1. to their
proper units and outputs them as reals to file mach..
Data Set Citation
Dataset Originator/Creator: TOGA COARE
Dataset Title: NASA DC-8 Aircraft Navigation Data (DADS) for the TOGA COARE Intensive Observing PeriodOnline Resource: http://daac.gsfc.nasa.gov/fieldexp/TOGA/
Start Date: 1993-01-01Stop Date: 1993-02-28
Distribution Media: On-line
Bowditch, N., 1977: American Practical Navigator, 2 vols. Defense
Mapping Agency Hydrographic/Topographic Center.
NASA TOGA COARE Project Office, 1993: Mission Summary Reports, TOGA
COARE. NASA Langley Research Center, Mail Stop 483, Hampton, VA
NASA TOGA COARE Project Office, 1994: NASA/TOGA COARE Science Data
Workshop II Proceedings, ... Albuquerque, New Mexico, March 15-17, 1994,
NASA Langley Research Center, Mail Stop 483, Hampton, VA 23666, 4 pp.
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.
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Creation and Review Dates
Last DIF Revision Date: 2008-08-14