PACJET Projects |
HMT 2004
PACJET 2003
PACJET 2002
PACJET 2001
CALJET 1998
|
Resources |
GPS Realtime Water Vapor
GWINDEX
West Coast RUC
ETL Profiler Network
Press Materials
|
Background |
About Pacjet
CALJET Summary
Societal Impacts and User Input
Linkages to National Priorities
USWRP
Data Assimilation Implementation Plan
March 2001 Program Status Report
PACJET 2001 Poster
NSSL Briefing
|
Program Documents |
PACJET and a Long-term Effort
to Improve 0-24 h West Coast Forecasts
Overview Poster
|
Research Participants |
NOAA Research
ETL,
NSSL,
FSL,
AL,
CDC
National Weather Service Western Region
Eureka,
Hanford,
Medford,
Monterey,
Oxnard,
Portland,
Reno,
Sacramento,
San Diego,
Seattle,
CNFRC
Office of Marine and Aviation Operations
AOC
Naval Postgradute School
DRI CIASTA
CIRES
SUNY Stony Brook
National Centers for Environmental Prediction
EMC,
HPC,
MPC
National Environmental Satellite, Data
and Information Service
CIMSS,
CIRA
|
Operational Forecasting Components |
COMET Presentation
West Coast RUC
Aircraft Obs via AWIPS
GWINDEX Poster
Applications Development
|
Research Components |
Modeling Research Components
|
Related Experiments |
Winter Storm Reconnaissance (Central Pac.)
CRPAQS (CA Air Quality)
IMPROVE (Microphysics)
THORPEX (Synoptic Targeting)
|
Observing Systems |
AEROSONDE
NOAA P-3
Wind Profiler Network
Satellite Products
NOAA S-band Radar
|
Contacts |
Program
Media Contacts
Webmaster
|
Workshops |
2001 - Monterey, CA
July 13-14 2000 (Boulder, CO)
July Workshop Agenda
September 1999 - Monterey, CA
1999 Planning Workshop Figures
June 1998 - CALJET
|
|
AEROSONDE
PACJET presents an opportunity for realistic field testing of a promising UAV,
the AEROSONDE. The goal is to conduct at least one successful flight from Hawaii
to the west coast in the context of a significant storm and with over-the-horizon
communication with the UAV. The capabilities of the AEROSONDE
appear to be well suited to PACJET's goal of measuring the low-level jet.
|
|
NOAA P-3
In flight reconnaissance report
Observations from the P-3 aircraft will be synthesized into a brief report that contains
measurements of several key aspects of storms 200-500 km offshore, or roughly 6-12 h before
the heaviest rain is anticipated to reach shore. The types of measurements are based on the
unique array of instruments on board the P-3, including a surveillance radar on its belly, a
Doppler radar on its tail, a scanning radar altimeter to measure sea state from aloft,
dropsondes, and low-altitude flights to pinpoint the low-level jet and its water vapor content.
The message will contain information that forecasters and the forecast user communities
identified as key to the watch/warning program and to emergency management at two
planning workshops held in 1999 and 2000. Before a flight, these groups will be alerted that
such reports will become available in the next 24 hours. During a flight the reconnaissance
message will be posted on the PACJET web page roughly every 2 hours.
|
Developmental flight report format.
|
Tail Radar Data
The tail radar on the P-3 is a Doppler radar and provides detailed measurements of the
vertical and kinematic (wind) structure of storms in a swath roughly 80 km wide (40 km on
either side of the aircraft). These data have proved especially useful in research, and will
provide real-time measurements of the intensity of precipitation and depth of the storm, as
well as the height of the freezing level that will be included in the reconnaissance message.
|
Data from the P3 Tail radar during CALJET.
|
Fuselage Radar Data
The belly radar is not a Doppler radar, but it provides radar reflectivity measurements out to a
range of roughly 200 km. This capability allows on-board assessment of the position,
orientation, and strength of rain bands. Rain band motion can be determined by tracking
them over roughly an hour.
|
Data from the P3 Fuselage Radar during CALJET.
|
PACJET Flight data system
The flight data system currently installed on the P3 will allow the flight reconnaissance
report to be transmitted twice an hour. Efforts are being made to acquire an satellite
transmission system which would provide greater bandwidth and two-way communication between
the plane in flight and the operations center. |
![](img/data_system.sm.jpg)
Schematic of P3 data system.
|
|
|
Wind Profiler Network
Profiler deployment for CRPAQS.
|
|
Satellite Products
Cooperative Institute for Research in the Atmosphere (CIRA) AMSU Data
Tutorial: Polar Satellite
Products for the Operational Forecaster: Microwave
Cloud Liquid Water
|
Rain Rate
|
AVN Geopotential Height
|
AMSU Geopotential Height
|
ETL Satellite Climate Research Group
|
SSM/I Water Vapor with Quickscat Winds |
A number of satellite products and images will be produced at ETL during PACJET
both for large-scale monitoring and algorithm calibration/validation
efforts. Data from numerous operational satellites are currently
archived by ETL and will be used to support the PACJET field program.
Some examples of satellite products planned for PACJET include
individual overpass and daily composite satellite derived estimates of
precipitation, cloud liquid water, total precipitable water, and ocean
surface wind speed from SSM/I passive microwave observations. Other
satellite products will include daily surface wind vectors from the
Quikscat scatterometer and sea surface temperature estimates from GOES
and AVHRR data. An example image of SSM/I derived total precipitable
water with surface wind vectors from QuikScat is shown here. In
addition, mid and upper tropospheric water vapor imagery from the
microwave SSM/T2 and AMSU-B moisture sounders will be available.
|
|
S-band data
|
S-band radar deployed at CALJET
|
ETL S-band Radar
A new S-band vertical profiler with a coupler option for extending the
dynamic range of the radar's receiver has been developed by the NOAA
Environmental Technology Laboratory and successfully field tested during
CALJET. The 30 dB of added dynamic range provided by the coupler allows
the profiler to record radar reflectivity measurements in
moderate-to-heavy precipitation that otherwise would not have been
possible with this system because of receiver saturation. The radar
hardware, signal processor, and operating software are based on existing
S-band and UHF profiler technology developed at the NOAA Aeronomy
Laboratory. Results from a side-by-side comparison with the NOAA K-band
radar were used to determine the calibration and sensitivity of the
S-band profiler. In a typical cloud profiling mode of operation, the
sensitivity is -14 dBZ at 10 km or -25 dBZ at 3 km. During CALJET, the
profiler was deployed at Cazadero, California, near the crest of the
coastal mountains in a region climatologically prone to flooding. The
profiler was part of an integrated observing system designed for
measuring physical processes associated with orographic precipitation
enhancement. The CALJET S-band dataset is also being applied to the
problem of quantitative precipitation estimation using the WSR-88D
(NEXRAD) network.
|
|