 KWAJEX
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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. Andrew Heymsfield, Senior Scientist, MMM
Division, NCAR, Boulder, Colorado 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.
Characteristics
Three files have been created from data collected by the 2dc and HVPS probes
aboard the UND Citation during KWAJEX.
| DATA CHARACTERISTICS |
|---|
| Data | Contents | Description |
|---|
| 2dc concentration spectra | 1 Hz concentration spectra |
There are 28 size bins with a diameter range from 32 to 4000 microns. A
reconstruction technique was used for partial images. |
| HVPS concentration spectra | 1 Hz concentration spectra | There
are 65 size bins with a diameter range from 192 to 25000 microns. |
| 2dc + HVPS composite spectra | 1 Hz
concentration spectra | The spectra are merged versions of files 1 and
2. A flexible merging point was used to make a smooth transition, but it was
usually in the range from 800 to 1000 microns (e.g. 2dc from 32-800 microns,
then HVPS from 800 to 15000 microns). There are 50 size bins with a diameter
range from 32 to 15000 microns. |
Naming Conventions
ASCII Files. The naming convention for the ascii data files is:
yyyymmddhhmm_kwajex_cit_leg[filetype]_#ofRecords
The date and time refer to the start of the flight.
Image Files. Images from the 2dc have been stored in separate
.gif files. The naming convention for the image files is:
mmddyyyy_hhmmss.gif, which indicates the start time.
Characteristics
File
Type | Format |
Organization | Compression |
|---|
| Data | ASCII |
| Headers |
|---|
| Line 1: Indicates the number of header lines |
| Line 2: Contains the original filename |
| Rest of header: Information about the bin sizes, etc. |
| Data |
|---|
| Col | Parameter |
|---|
| 1-6 | Date and time. Files that cross midnight will contain the same date,
but have a time past 23:59:59. (e.g. 25:13:00 = 01:13:00)
| | 7-8 | Latitude and longitude (degrees)
| | 9 | Altitude (meters)
| | 10 | True air speed (meters/second)
| | 11 | Pressure (millibars)
| | 12-13 | Temperature and dewpoint (C)
| | 14 | Total concentration (#/m^3). The total particle
concentration measured by the probe(s). The first bin of the 2dc (32-64
microns) is not used due to noisiness.
| | 15-* | The concentration for each bin. These are normalized by bin width (#/m^3/m). |
| Bad data value: -999.99 |
- Some basic data about the aircraft's
position and environment have been added for
convenience.
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| gzip |
| Image | GIF |
Every 10th image buffer recorded by the 2dc is shown (5 buffers per .gif file.) The start time of each
buffer is indicated on the image. A complete set of images for any time period is available on request. | tar |
FTP Site
The Microphysics data from KWAJEX may be accessed from this page,
Microphysics Data Online
or directly via ftp:
ftp disc2.nascom.nasa.gov
logon: anonymous
passwd: <your internet address>
cd data/KWAJ/aircraft/und_citation/microphysics
The Principal Investigator for the microphysics data is
Dr. Andrew Heymsfield
Senior Scientist
MMM Division, NCAR
3450 Mitchell Lane
Boulder, Colorado 80301
heyms1@ncar.ucar.edu
303-497-8943 (voice)
303-497-8171 (fax)
Technical questions about the microphysics data should be directed to
Aaron Bansemer
NCAR/MMM
PO Box 3000
Boulder, CO 80307-3000
(303)497-8913
bansemer@ucar.edu
For Information about field experiment 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:Tue Nov 25 10:01:57 EST 2003
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