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Common Microphysics Products from the NASA DC-8
Version 4A

Data Set Overview
Sponsor

The Files
Naming Convention
Format
Documentation

Data Access & Contacts
FTP Site
Points of Contact
CMP Data (version 4A) from the NASA DC-8 CMP Document CFP Document Adobe Acrobat download link
Alert:New additions to the Version 4A KWAJEX CMP data are now available on this site. If you previously acquired Version 4 CMP products from this site, please replace them with Version 4a.
Documentation update for version 4A CMP data

Data Set Overview

The data in these zip files contains Version 4 Common Microphysics Products for the DC8 aircraft during the TRMM/KWAJEX Field Campaign.

Sponsor

The distribution of these data sets is funded by NASA's Earth Science Enterprise. The data are not copyrighted; however, we request that when you publish data or results using these data, please acknowledge as follows:

The authors wish to thank Dr. David Kingsmill, Desert Research Institute, Reno, Nevada for the production of these data and the Distributed Active Archive Center(Code 610.2) at the Goddard Space Flight Center, Greenbelt, MD, 20771, which archives and distributes them under sponsorship of NASA's Earth Science Enterprise.

The Files

Naming convention

The naming convention for the cmp files is

cfp_vers#_yyyymmddhhmm_expname_acname_totseg#
where:
cmp/cfp = commpn microphysical data file or common flight data product;
# = version number;
yyyymmddhhmm = year, month, day, hour & minute of the start of the leg;
expname = experiment name;
acname = aircraft name;
total # of 1-km segments to the flight

Formats

Each zip file corresponds to a flight leg defined in:

http://www.atmos.washington.edu/gcg/MG/KWAJ/ops-web/prioritylegs/all_flt_legs/all_flt_legs.html

For example, leg_199908030408_kwajex_dc8.zip corresponds to the flight leg starting at 0408 UTC on August 3rd, 1999. All priority 4 and 5 KWAJEX flight legs for the DC8 have been processed except those with missing or bad data, or where the DC8 was the only aircraft on the leg.

There are three different types of files contained within each leg_*.zip file:

CMP files

These are Common Microphysics Product files containing the information and formatted according to the CMP Document:

TRMM Common Microphysics Product Definition

CFP files

These are Common Flight Product files used as input to the software for generating the CMP files:

TRMM Common Flight Product Definition

2DC Image files

There is one 2DC image file (jpeg format) for each 1 km sampling bin of the flight leg. Images are displayed in blue on top of vertically oriented, gray strips. The width of these strips is 1.6 mm and represents the diode array dimension (Y-axis). Occasionally, these strips may appear relatively wide. However, their width is always scaled to 1.6 mm.

Displayed images may include artifacts that were eliminated from the quantitative analysis. The most common artifacts were streakers, thin images oriented normal to the diode array dimension.

The images in each jpeg file are those nearest the center time of the relevant 1 km sampling bin, which is listed in the image file name. If the 2DC probe did not sense any particles in a particular 1 km sampling bin, images from before or after the sampling bin are displayed. Times for each pair of image strips are indicated in each image file.

Documentation

The original documentation for the DC8 Common Microphysics Products version 4 is available on the ftp site in microsoft word format, README_KWAJ_DC8_CMP_v4a.doc, and in ASCII text, README_KWAJ_DC8_CMP_v4a.txt

Data Access and Contacts

FTP Site

The CMP data resides on DISC anonymous FTP. You may access the files from this document,

FTP GIFCommon Microphysics Products

or directly via FTP at

ftp disc.gsfc.nasa.gov
login: anonymous
password: < your internet address >
cd ftp://disc2.nascom.nasa.gov/data/KWAJ/aircraft/nasa_dc8/dri_cmp/dc8_cmp_vers-4a

Points of Contact

Technical Inquiries about this Data should be addressed to the Principal Investigator for the NASA DC-8 Common Microphysics Products,

Dr. David Kingsmill
Atmospheric Science Center
Desert Research Institute
2215 Raggio Parkway
Reno, NV 89512-1095
Phone: (775) 674-7071
FAX: (775) 674-7007
email: davidk@dri.edu

For Information about KWAJEX data at the Goddard DISC, contact

Hydrology Data Support Team
Goddard DISC, Code 610.2
NASA Goddard Space Flight Center
Greenbelt, MD 20771
phone: 301-614-5224
fax: 301-614-5268
email: help-disc@listserv.gsfc.nasa.gov

Last update:Thu Jan 8 09:32:44 EST 2004
Page Author: Hydrology Data Support Team -- hydrology-disc@listserv.gsfc.nasa.gov
Web Curator: -- Website Curator: Anthony Drake
NASA official: Steve Kempler, DISC Manager -- kempler@disc.gsfc.nasa.gov
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