CAMEX-4 NOAA WP-3D Cloud Physics (KAMP)

Table of Contents

General Information
Instrumentation
Tape Formats
Data Distribution
References
Contact Information

General information

The Convection And Moisture EXperiments (CAMEX) are a series of field research investigations sponsored by the Earth Science Enterprise of the National Aeronautics and Space Administration (NASA). CAMEX-4 focused on the study of tropical cyclone (hurricane) development, tracking, intensification, and landfalling impacts using NASA-funded aircraft and surface remote sensing instrumentation.

The fourth field campaign in the CAMEX series (CAMEX-4) ran from 16 August to 25 September, 2001 and was based out of Jacksonville Naval Air Station, Florida. An important addition to CAMEX-4 was the participation of the NOAA weather reconnaissance WP-3D that collected radar, video and microphysical data.

The primary cloud physics instruments on the WP-3D are the 2D-C (0.005 mm resolution) and 2D-P (0.15 mm resolution) PMS probes for sampling the sizes of raindrops and ice crystals. The data from the 2D-imaging probes were recorded on DAT (4mm tape) since 1992. Small ice columns are detected directly on a FORMVAR replicator. Cloud water is measured by both JW and King Probes.

Instrumentation

Electric fields are measured by 4 shutter type mills mounted normal to the aircraft skin, up, down, left, and right. The horizontal mills are symmetrically mounted about midway between the door and the trailing edge of the wings. The vertical mills are mounted near the trailing edge of the wings, but their vertical location differs by 0.6 m and the top mill is mounted on a 0.3 m aluminum pylon.

Relative enhancements were measured by charging the aircraft in cloud-free flight.

Cloud Physics Parameters
Instrumentation
Range
Small cloud droplet spectrum FSSP forward scattering probe
0.005-0.047 mm
Cloud droplet spectrum PMS 2-D Grayand/or mono probes
0.03-1.92 mm
hydrometeor PMS 2-D Grayand/or mono probes
0.15-9.6 mm
Cloud liquid water Johnson-Williams hot wire
<0.04 mm
Total liquid water PMS King probe
<0.1 mm
Cloud particle replication Formvar Replicator-DRI
0.05-1.3 mm
Cloud particle charge Particle charge probe-DRI
>2 pC
Two components of electric field Field Mills-DRI
2-120 kVA/m
Icing rate Rosemount

Tape Formats

The W3-PD Cloud Physics tapes have variable length records, recorded in the Intel/Dec byte order. The records vary from 132 to 20000 bytes in length. If you use a machine with the Big-Endian (HP, Sun) byte order, the data will need to be byte-swapped before it can be interpreted.

The data on these tapes contain PMS FSSP-100, PMS 2D-C mono, and SPEC HVPC data.

Data Distribution

Data are archived and distributed on 4mm DAT tapes. Distributed tapes are byte for byte copies of our master tape, via a DAT tape duplicator.

Flight Identification and Times for these data:

NOAA P-3 CLOUD PHYSICS DATA TAPES, Four 4mm DAT tapes, 1 tape per flight:
---------------------------------------------------------------------
FLIGHT Start - Stop Comments
010903H 1/1 1529:21 - 1738:32 KAMP-1
010907H 1/2 1647:57 - 1801:07 KAMP-2
010909H 1/2 1556:17 - 1603:35 KAMP-3
010919H 1/1 2009:43 - 2018:53 KAMP-4

These tapes were supplied by:

Atlantic Oceanographic and Meteorological Laboratory4301
Rickenbacker Causeway
Miami, FL 33149

Any Question about the data, or the data format should be directed to the data supplier. http://www.aoml.noaa.gov/contact.html

References

Jorgensen, D., and P. Willis, 1982: A Z-R relationship for hurricanes. J. Appl. Meteor., 21, 356-366.

Willis, P., J. Hallett, R. Black, and W. Hendricks, 1994: An aircraft study of rapid precipitation development and electrification in a growing convective cloud. J. Atmos. Res., 33, 1-24.

Contact Information

To order these data or for further information, please contact:

Global Hydrology Resource Center
User Services
320 Sparkman Drive
Huntsville, AL 35805
Phone: 256-961-7932
E-mail: support-ghrc@earthdata.nasa.gov
Web: http://ghrc.nsstc.nasa.gov/