Facilities Description Summaries
Atmosphere Surface Turbulent Exchange Research facility (ASTER)
facility with fast-response sensors for multi-site measurements of surface
momentum, heat, water vapor fluxes, and surface energy balances. The system
includes data communication, validation, and display tools and capability
to incorporate user-supplied chemical sensors. ATD/SSSF operates (1) ASTER
consisting of a base station and several tower-based sensor arrays.
Cross-chain Loran Atmospheric Sounding System (CLASS)
system that support Loran-C and Omega navigational winds and includes
surface meteorological measurements. ATD/SSSF operates (5) trailer-based
and (1) van-based mobile CLASS.
Integrated Sounding System (ISS)
multiplatform system that combines a balloon borne Radiosonde Navaid (Loran
or Omega) Sounding System, an enhanced surface observing station, a 915MHz
Doppler clear-air Wind Profiling Radar, a Radio Acoustic Sounding System
(RASS) and communication, data processing and display infrastructure.
ATD/SSSF operates (4) ISS.
Portable Automated Mesonet (PAM III and Flux PAM)
of remote surface meteorology stations. The base stations are outfitted
with accurate sensors that measure U,V,T,q, P, solar radiation and precipitation.
The FLUX- PAMs in addition measure fluxes of momentum, sensible heat,
water vapor, net radiation and soil heat. Solar power and satellite data
transmission make the PAMs suitable for remote operations. ATD/SSSF operates
(3) PAM III stations, all with flux measurement capability.
S-band dual-polarization Doppler radar with improved signal processing
and polarization capabilities. The radar uses a high-quality antenna with
high gain and low sidelobe performance; highly reliable transmitter built
around an ASR-9 system; and parallel receivers to receive both co-polar
and cross-polar responses simultaneously. A highly innovative design package,
S-POL fits into 20-foot shipping containers and with no radome, greatly
easing transportability. ATD/RSF operates one S-POL radar system.
A 11 cm wavelength
Doppler system with dual polarization capability. The custom designed
8.5 m diameter parabolic antenna (1.1 degree half power beam width) has
suppressed sidelobe levels, and achieves excellent matching between the
horizontal (H) and vertical (V) beam patterns. To maximize the isolation
between the transmitted polarization states, the antenna's H and V feed
are separately driven by a pair of identical transmitters. Two matching
receivers handle the co- and cross-polarized signal returns. The received
signals are digitally processed in real time, and are presented on an
interactively controlled color display. All data fields are achieved at
full resolution on magnetic tape for post analysis. These data fields
include reflectivity, linear depolarization ratio and correlation coefficient.
The radar's operational control system is highly flexible, readily allowing
real-time modification of data acquisition parameters. CSU operates one
CHILL portable radar system.
P3Dora Radar (ELDORA)
An airborne (installed
on the Naval Research Laboratory P-3 (NRL P-3) aircraft), X-Band Doppler
radar, that produces dual-Doppler data from vertical scans of two fixed-plate
antennas with fore and aft orientations. Effective along-track resolution
approaches 300 meters. Pulsed waveforms at five different transmit frequencies
provide dual PRF-unambiguous velocities up to +/- 100 m/s. ATD/RSF operates
one P3Dora radar system.
Dropsondes (Lightweight Loran Digital (L2D2), Omega Digital (LOD2), GPS)
sondes launched from aircraft which provide pressure, temperature, and
humidity measurements directly from the sonde and wind measurements through
Omega (LOD2), Loran-C (L2D2) or GPS navigation. ATD/SSSF operates four
single-channel dropsonde systems (LOD2 or L2D2), often in pairs to provide
dual-sonde capability from a single aircraft. Four sondes can be dropped
simultaneously when using the GPS dropsondes.
PROJECT SUPPORT AND DATA MANAGEMENT
Joint Office for Science Support
Corporation for Atmospheric Research (UCAR) Joint Office for Science Support
(JOSS) maintains a core resource for coordination, planning, implementation,
and data management of geophysical research projects. The organization
provides a broad range of field support services and can guide a field
program through its entire life cycle, from initial scientific planning
and experimental design to management of the resulting datasets. An automated
data retrieval and archival system (CODIAC) is available via the Internet
to support the science community with field program datasets.
NCAR/ATD Research Data Program
Atmospheric Technology Division, Research Data Program develops tools
for managing, distributing, analyzing and interpreting real-time data
from the ATD facilities and instrumentation during a field program. Post-project
data sets are available from major ATD field programs. Analysis software
tools such as ZEBRA are available for editing, display, overlay, scientific
processing, and analysis of a wide range of environmental data.
Facility Data Management
the National facilities have capabilities to provide real-time data sets
to the Principle Investigators involved in the field experiments. In all
cases the data is archived for a period of time and can be made available
to the wider scientific community at out-of-pocket expense by the requesting