Acronyms / Glossary

0-9

2DC
two-dimensional cloud

A

AAF
ARM Aerial Facility
AAO
Adjacent Arctic Ocean
AATS
Ames airborne tracking sunphotometer
ABE
Aerosol Best Estimate
ABL
atmospheric boundary layer
ABLE
Argonne Boundary Layer Experiment
ABRFC
Arkansas Basin Red River Forecast Center
ACARS
Aerodynamic (Research Incorporated) Communication and Recording System
ACE
Aerosol Characterization Experiment
ACROS
airborne cloud-radiation observing system
ACSYS
Arctic Climate System Study
ACT
ARM Coordination Team (no longer in use)
ACTIVE
aerosol and chemical transport in tropical convection
ADA
anomalous diffraction approximation
ADAS
ARPS data analysis system
ADEOS
advanced earth observing system (Japan Space Program)
ADM
angular dependence model
AE
Angstrom exponent (no longer in use)
AEBR
aerosol extinction-to-backscatter ratios
AEC
ARM Experiment Center
AEM
Automatic Exchange Mechanism
AER
Atmospheric Environmental Research, Inc.
AERI
atmospheric emitted radiance interferometer
AERI-ER
extended-range AERI
AERI-X
high-resolution (0.1 cm-1) version of AERI
AERONET
Aerosol Robotic Network
AEROSE
Aerosol and Ocean Science Expedition
AES
airborne emission spectrometer
AFGL
Air Force Geophysics Laboratory
AFOSR
Air Force Office of Scientific Research
AFWEX
ARM-FIRE Water Vapor Experiment
AGARD
Advisory Group for Aerospace Research and Development
AGC
Automatic Gain Control
AGCMs
atmospheric general circulation models
AGL
above ground level
AI
aerosol index
AIA
ARM Information Architecture
AIDJEX
Arctic Ice Dynamics Joint Experiment
AIE
aerosol indirect effect
AIMS
Australian Institute of Marine Science
AIRS
atmospheric infrared sounder
AIS
ARCS Integration Site (no longer in use)
ALFA
AER local forecast and assimilation (model)
AMF
ARM Mobile Facility
AMIE
ACRF MJO Investigation Experiment
AMIP
Atmospheric Model Intercomparison Project
AMMA
African Monsoon Multidisciplinary Analysis
AMSR
advanced microwave scanning radiometer
AMSU-B
Advanced Microwave Sounding Unit-B
AMT
ARM Management Team
ANL
Argonne National Laboratory
AOD
aerosol optical depth
AOML
Atlantic Oceanographic and Meteorological Laboratory
AOS
aerosol observing system
AOT
aerosol optical thickness
AP
anisotropy parameter
APOLLO
AVHRR Processing Scheme Over Land, Cloud, and Ocean
APS
aerosol particle-sizing spectrometer
ARC
Ames Research Center
ARCS
Atmospheric Radiation and Cloud Station (no longer in use)
ARCSS
Arctic System Science (NSF)
ARCSYM
Arctic Regional Climate System Model
ARCUS
Arctic Research Consortium of the United States
ARESE
ARM Enhanced Shortwave Experiment
ARF
aerosol radiative forcing
ARH
atmospheric radiative heating
ARINC
Aerodynamic Research Incorporated Communication
ARL
Air Resources Laboratory (NOAA)
ARM
Atmospheric Radiation Measurement (Program)
ARMBE
ARM best estimate (data products)
ARMBEATM
ARM Best Estimate Atmospheric Measurements value-added product
ARMBECLDRAD
ARM Best Estimate Cloud Radiation value-added product
ARPS
Advanced Regional Prediction System
ARS
Agricultural Research Service
ARSCL
active remote sensing of cloud locations
AS
anvil stratus
ASC
arctic stratus cloud
ASD
analytical spectral devices
ASIR
absolute scanning infrared radiometer
ASIVA
All Sky Infrared Visible Analyzer
ASOS
automatic surface observing system
ASP
Atmospheric Science Program
ASR
aerosol scattering ratio
ASRC
Atmospheric Sciences Research Center
ASTER
Atmosphere-Surface Turbulent Exchange Research
ASTEX
Atlantic Stratocumulus Transition Experiment
ASTI
absolute solar transmittance interferometer
ASTIC
All Sky Thermal Infrared Camera
ATD
Atmospheric Technology Division (NCAR)
ATHAM
Active Tracer High-resolution Atmospheric Model
ATMIS-II
Atmospheric Moisture Comparison Study
AVA
ARM Volume-Imaging Array
AVHRR
advanced very-high-resolution radiometer
AVIRIS
airborne visible and infrared imaging spectrometer
AVP
ARM Aerial Vehicles Program
*As of February 2009, this program was renamed ARM Aerial Facility.
AWEX
AIRS Water Vapor Experiment (no longer in use)
AWS
automated weather station
AZA
azimuth angle

B

BAERI
Bay Area Environmental Research Institute
BAMS
Bulletin of the American Meteorological Society
BAO
Boulder Atmospheric Observatory
BARFEX
Boardman Atmospheric Radiation Flux Experiment
BASE
Beaufort and Arctic Storms Experiment
BATSE1
Biosphere-Atmosphere Transfer Scheme, Version 1e
BBHRP
broadband heating rate profile
BBSS
balloon-borne sounding system
BC
black carbon
BCR
baseline change request
BDRF
bidirectional reflectance functions
BEO
Barrow Environmental Observatory
BF
boundary facility
BL
boundary layer
BLC
Belfort laser ceilometer
BLX
Boundary Layer Experiment
BMRC
Bureau of Meteorological Research Center
BNL
Brookhaven National Laboratory
BOM
Australian Bureau of Meteorology
BOMEX
Barbados Oceanographic and Meteorological Experiment
BORCAL
broadband outdoor radiometer calibration
BOREAS
Boreal Ecosystem-Atmosphere Study
BRDF
bidirectional reflectance distribution function
BRS
broadband radiometer station
BSRN
baseline surface radiation network
BT
back trajectory
BTD
brightness temperature difference

C

CAGATE
CCPP-ARM GCM analysis of tendency errors (no longer in use)
CAGEX
CERES/ARM/GEWEX
CALIPSO
Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation
CALVAL
Calibration and Validation
CAM-5
NCAR Community Atmosphere Model
CAMEX
Convection and Moisture Experiment
CAP-MBL
Cloud, Aerosol, and Precipitation in the Marine Boundary Layer
CAPE
convective available potential energy
CAPT
CCPP-ARM Parameterization Testbed (no longer in use)
CAR
corrective action report
CARES
Carbonaceous Aerosol and Radiative Effects Study
CARL
CART Raman lidar (no longer in use)
CART
Cloud and Radiation Testbed (no longer in use)
CASES
Cooperative Atmosphere Surface Exchange Study
CBH
cloud base height
CCD
charge-coupled device
CCM1
Community Climate Model, Version 1
CCM2
Community Climate Model, Version 2
CCM3
Community Climate Model, Version 3
CCN
cloud condensation nuclei
CCPP
Climate Change Prediction Program
CCSM2
Community Climate System Model, Version 2
CCSP
Climate Change Science Program
CDE
CART data environment (no longer in use)
CDL
cloud detection lidar
CDR
circular depolarization ratio
CEM
cloud ensemble model
CEOS
Committee on Earth Observation Satellites
CEPEX
Central Equatorial Pacific Experiment
CERES
Clouds and Earth's Radiant Energy System
CESAR
Cabauw Experimental Site for Atmospheric Research
CF
Central Facility
CFC
chlorofluorocarbon
CFDE II
Canadian Freezing Drizzle Experiment II
CFSR
Climate Forecast System Reanalysis
CGCM
coupled (ocean-atmosphere) general circulation model
CGPS
Continuous Global Positioning System
CIC
Cloudiness Intercomparison Campaign (no longer in use)
CIDS
CEPEX integrated data system
CIMMS
Cooperative Institute for Mesoscale Meteorological Studies
CIN
convective inhibition
CINDY2011
Cooperative Indian Ocean Experiment on Intraseasonal Variability in Year 2011
CIR
cloud infrared radiometer
CIRA
Cooperative Institute for Research in the Atmosphere
CIRES
Cooperative Institute for Research in Environmental Sciences
CIRPAS
Center for Interdisciplinary Remotely Piloted Aircraft Studies
CL
convective precipitation over land
CLAMS
Chesapeake Lighthouse and Aircraft Measurements for Satellites
CLASIC
Cloud Land Surface Interaction Campaign
CLASS
Cross-Chain Loran Atmospheric Sounding System
CLAVR
Cloud Advanced Very High-Resolution Radiometer
CLEX
Cloud Layer Experiment
CLIVAR
Climate Variability and Predictability (Program)
CLOWD
Clouds with Low Optical (Water) Depths Working Group
CLP
cloud liquid path (no longer in use)
CLS
cloud and aerosol lidar system
CLWG
Cloud Lifecycle Working Group
CM
cloud mask
CMBE
Climate Modeling Best Estimate
CMDEWP
chilled-mirror dew point hygrometer
CMDL
Climate Monitoring and Diagnostics Laboratory (NOAA)
CN
condensation nucleus
Co2FLX
carbon dioxide flux system
COARE
Coupled Ocean Atmosphere Response Experiment
CODE
Center for Orbit Determination in Europe
COPS
Convective and Orographically-induced Precipitation Study
CP
Cloud Properties Working Group
CPM
Cloud Parameterization and Modeling
CPRS
cloud profiling radar system
CPW
Cloud Properties Working Group (no longer in use)
CQI
continuous quality improvement
CRD
cavity ring-down
CRF
cloud radiative forcing
CRHF
cloud radiative heat forcing
CRM
cloud-resolving model
CRS
Clouds and Radiative Swath
CRYSTAL-FACE
Cirrus Regional Study of Tropical Anvils and Cirrus Layers—Florida Area Cirrus Experiment
CS
cloudscope
CSIRO
Commonwealth Scientific and Industrial Research Organization
CSM1
Climate System Model, Version 1
CSP
Combined Sensor Program
CSPHOT
cimel photometer
CSPOT
camel sun photometer (no longer in use)
CSRM
cloud system-resolving model (no longer in use)
CSU
Colorado State University
CTBL
cloud-topped boundary layer
CUT
Coordinated Universal Time
CWV
columnar water vapor

D

DAAC
Distributed Active Archive Center
DABUL
depolarization aerosol and backscatter unattended lidar
DAO
data assimilation office
DART
discrete angle radiative transfer
DDI
downwelling diffuse irradiance
DEM
digital elevation model
DEW
distant early warning
DFDI
diffuse downward irradiance
dhr
differential heating rate
DIAL
differential absorption lidar
DISORT
discrete ordinate radiative transfer
DLF
downwelling longwave flux (no longer in use)
DMF
Data Management Facility
DMS
Data Management System
DMT
Data Management Team
DNSI
direct-normal solar irradiance
DOD
data object design
DOE
U.S. Department of Energy
DQ
Data Quality
DQ HandS
Data Quality Health and Status
DQAR
Data Quality Assessment Report
DQMS
Data Quality Management System
DQO
Data Quality Office
DQPR
Data Quality Problem Report
DQR
Data Quality Report
DRI
Desert Research Institute
DSC
directed scattering coefficients
DSD
drop size distribution
DSIT
Data and Science Integration Team
DSP
digital signal processor
DWR
dual wavelength radio
DYNAMO
Dynamics of the Madden-Julian Oscillation (MJO)

E

EA
environmental assessment
EBBR
energy balance bowen ratio
EC
Experiment Center
ECDL
external cavity diode laser
ECLIPS
Experimental Cloud Lidar Pilot Study
ECMWF
European Centre for Medium-Range Weather Forecasts
ECOR
eddy correlation
ED
experiment design
EF
extended facility
EMEX
Equatorial Mesoscale Experiment
EML
Environmental Measurements Laboratory (DOE)
ENP/A
Eastern North Pacific/Atlantic
ENSO
El Nino-Southern Oscillation
EOF
empirical orthogonal functions
EOM
Easter Ocean Margin (CART site)
EOP
experiment operation plan
EOS
earth observing plan
EPA
U.S. Environmental Protection Agency
EPIC
Eastern Pacific Investigation of Climate
EPLAB
The Eppley Laboratory, Inc.
ERAST
Environmental Research Aircraft and Sensor Technology (NASA)
ERBE
Earth Radiation Budget Experiment
ERL
Environmental Research Laboratory
ERL (SGP site)
Electronics Repair Laboratory
EROS
earth sciences resources observation systems
ERS-1
European research satellite-1
ESFT
exponential sum fitting of transmission (technique)
ESRL
Earth System Research Laboratory
ESTAR
electronically scanned thinned array radiometer
ETA/EDAS
ETA Data Assimilation System
ETL
Environmental Technology Laboratory
ETM+
enhanced thematic mapper plus
EUROCS
European Project for Cloud Systems Studies

F

FAA
Federal Aviation Administration
FASCODE
Fast Atmospheric Signature Code
FASE
FASCODE for the environment
FASINEX
First Air-Sea Interaction Experiment
FC
IISCCP Flux Cloud
FCC
fractional cloud cover
FCCSET
Federal Coordinating Council on Science, Engineering, and Technology
FDDA
four-dimensional data assimilation
FDTD
finite-dimensional data assimilation
FFT
fast Fourier transform
FIFE
First ISLSCP Field Experiment
FIRE
First ISCCP Regional Experiment
FLRT
flexible, longwave, radiative transfer
FONSI
finding of no significant impact
FOV
field of view
FRSR
fast rotating shadowband radiometer
FSBR
fractional solar broadband radiometer
FSL
Forecast Systems Laboratory (NOAA)
FSSP
forward scattering spectrometer probe
FTIR
fourier transform infrared radiometer
FTS
Fourier transform spectrometer
FWHM
full width at half maximum
FZL
freezing level

G

GAC
global area coverage
GALE
Genesis of Atmosphere Lows Experiment
GAPD
Geiger-mode avalanche photo diode detector
GAPP
GEWEX Americas Prediction Project
GARP
Global Atmospheric Research Program
GATE
GARP Atlantic Tropical Experiment
GCIP
GEWEX Continental-Scale International Project
GCM
General Circulation Model (no longer in use)
GCSS
GEWEX Cloud System Study
GEBA
global energy balance archive
GEISA
Gestion et Etude des Informations Spectroscopiques Atmospheriques
GEM
global environmental multiscale (no longer in use)
GENESIS
Global Environmental and Ecological Simulation of Interactive Systems
GEOS
Goddard Earth Observing System
GERB
Geostationary Earth Radiation Budget
GEWEX
Global Energy and Water Experiment
GFA
geophysical focus area
GFDL
Geophysical Fluid Dynamics Laboratory
GFS
Global Forecast System
GIS
geophysical information system
GISS
Goddard Institute for Space Studies
GIST
GEWEX Integrated System Test
GLCTS
Global Land Cover Test Site
GMD
Global Monitoring Division
GMS
geostationary meteorological satellite
GMT
Greenwich Mean Time
GNDRAD
ground radiometers on stand for upwelling radiation
GOALS
global-ocean-atmosphere-land-system
GOES
geostationary operational environmental satellite
GOME
Global Ozone Monitoring Experiment
GPS
global positioning system
GRAMS
ground radiation measurement system
GSFC
Goddard Space Flight Center
GSM
global spectral model
GSPO
Global Studies Program Office
GTS
global telecommunications system
GUI
graphical user interface
GVAP
GEWEX Water Vapor Project
GVAX
Ganges Valley Aerosol Experiment
GVR
G-band (183 GHz) Vapor Radiometer
GVRP
G-band (183 GHz) Vapor Radiometer profiler
GWTSA
gamma-weighed two-stream approximation

H

HAPEX
Hydrology Atmosphere Pilot Experiment
HAWKS
HITRAN Atmospheric Workstation
HIRLAM
high-resolution limited area model
HIS
high-resolution interferometer spectrometer
HITRAN
high-resolution transmission
HL
high latitude
HONER
hemispherical optimized new radiometer
HR
heating rate
HRDL
high-resolution doppler lidar
HSFOVR
hemispherical field of view radiometer
HSI
hemispheric sky imager
HSRL
high spectral resolution lidar

I

IAP
in situ aerosol profile
IARPC
Interagency Arctic Research Policy
IASI
infrared atmospheric sounding interferometer
ICA
independent column approximation
ICE
Interface Configuration Experiment (no longer in use)
ICI
Infrared Cloud Imager
ICL
integrated cloud liquid
ICRCCM
Intercomparison of Radiation Codes in Climate Models
IDASS
integrated data assimilation and sounding system
IDL
interactive data language
IDP
Instrument Development Program
IF
intermediate frequency
IFA
intensive flux array
IFN
ice-forming nuclei
IFO
intensive field observation
IFOV
instantaneous field of view
IGBP
International Geosphere Biosphere Programme
ILW
integrated liquid water
IMG
Interferometric Monitor of Greenhouse Gases
IMMS
Instrument Mentor Monthly Summary
IMR
ice mixing ratio
IOP
intensive operational period
IPA
independent pixel approximation
IPC
International Pyrheliometer Comparison
IPCC
Intergovernmental Panel on Climate Change
IPM
instrument performance model
IR
infrared
IRF
instantaneous radiative flux
IRGA
infrared gas analyzer
IRICP
International Research Institute for Climate Prediction
IRSI
infrared sky imager
IRT
infrared thermometer
ISAN
isentropic analysis
ISCCP
International Satellite Cloud Climatology Program
ISDAC
Indirect and Semi-Direct Aerosol Campaign
ISLSCP
International Satellite Land Surface Climatology Project
ISO
International Organization for Standardization
ISS
integrated sounding system
IT
instrument team
ITCZ
intertropical convergence zone
ITPP
International TOVS Processing Package
IWC
ice water content
IWP
ice water path
IWV
integrated water vapor

J

JACCS
Japanese Cloud and Climate Study
JAMSTEC
Japanese Marine Science and Technology Center
JASMINE
Joint Air-Sea Monsoon Interaction Experiment
JD
Julian Day
JFD
joint frequency distribution
JISAO
Joint Institute for the Study of the Atmosphere and Ocean
JOSS
Joint Office for Science Support
JPL
Jet Propulsion Laboratory (NASA)

K

KNMI
Royal Netherlands Meteorological Institute

L

LAII
land-atmosphere-ice-interactions
Lake-ICE
Lake-Induced Convection Experiment
LAMS
limited area models
LANL
Los Alamos National Laboratory
LARC
Langely Research Center (NASA)
LASE
Lidar Atmospheric Sensing Experiment
LBL
line-by-line
LBLRTM
Line-By-Line Radiative Transfer Model
LBTM
Layered Bispectral Threshold Method
LCL
lifting condensation level
LDR
linear depolarization ratio
LES
large-eddy simulation
LI
lifted index
LIFT
lidars in flat terrain
LIRAD
lidar/radiometer
LITE
Lidar In-space Technology Experiment
LLJ
low-level jet
LLNL
Lawrence Livermore National Laboratory
LMS
least median squares
LN
liquid nitrogen
LNA
low noise amplifier
LPDM
Lagrangian Particle Dispersion Model
LRT
local recommendation team
LRU
lowest replaceable units (spare/replacement parts)
LST
Local Standard Time
LTE
local thermodynamic equilibrium
LUT
look up table
LW
longwave
LWC
liquid water content
LWP
liquid water path
LWR
longwave radiation

M

M-PACE
Mixed-Phase Arctic Cloud Experiment
MAERI
marine atmospheric emitted radiance interferometer
MAPR
multiple antenna profile radar
MAPS
mesoscale atmospheric simulator
MAQNET
multi-scale air quality network (no longer in use)
MAS
MODIS airborne simulator
MASRAD
Marine Stratus Radiation Aerosol and Drizzle
MAST
Monterey Area Ship Experiment
MATCH
Model for Atmosphere and Chemical Transport
MBL
marine boundary layer
MCBH
multiple cloud base height
MCICA
Monte Carlo Independent Column Approximation
MCIDAS
man-computer interactive data analysis system
MCS
mesoscale convective system
MCTEX
Marine Content Thunderstorm Experiment
MDN
meta data navigator
mdr
minimum detectable radiance
MDS
meta data system
MDTERP
Maryland Terrestrial Radiation Package
MET
Meteorological Instrumentation at AMF
MFP
mean-free-path
MFR
multi-filter radiometer
MFRSR
multi-filter rotating shadowband radiometer
MHz
megahertz
MIR
millimeter-wave imaging radiometer
MISR
multi-angle imaging spectrometer
MJO
Madden-Julian Oscillation
MLS
mid-latitude summer
MLW
mid-latitude winter
MM5
mesoscale model 5
MMCR
millimeter wave cloud radar
MMF
multi-scale modeling framework
MMTP
microwave temperature profiler
MOA
memorandum of agreement
MODIS
moderate-resolution imaging spectroradiometer
MODM
monochromatic optical depth
MODTRAN
moderate-resolution atmospheric radiance and transmittance model
MOLTS
model output location time series
MOP
memorandum of participation
MOPA
master oscillator power amplifier
MOPITT
measurements of pollution in the troposphere
MOU
memorandum of understanding
MPIR
multi-spectral pushbroom imaging radiometer
MPL
micropulse lidar
MRAS
mesoscale radiatively-induced anvil spreading
MRC
Mission Research Corporation
MRF
medium-range forecast
MRI
Meteorological Research Institute
MRO
maximum-random overlap
MS
marine stratus
MSG
Meteosat Second Generation
MSL
mean sea level
MSS
multi-spectral scanner
MSSA
multi-channel singular spectral analysis
MSX
Mid-Course Space Experiment
MTP
microwave temperature profiler
MWMFOC
multi-wavelength multifield of view
MWR
microwave radiometer
MWRP
microwave radiometer profiler
MWSR
microwave water substance radiometer

N

NASA
National Aeronautics and Space Administration
NASDA
Japanese National Space Development Agency
NATO
North Atlantic Treaty Organization
NBL
nocturnal boundary layer
NCAR
National Center for Atmospheric Research
NCDC
National Climatic Data Center
NCEP
National Centers for Environmental Prediction
NDNR
normalized differences of nadir reflectivity
NDVI
Normalized Difference Vegetation Index
NEP
noise equivalent power
NEPA
National Environmental Policy Act of 1969
NESDIS
National Environmental Satellite, Data, and Information Service
NEXRAD
next-generation radar
NFOV
narrow field of view
NGS
National Geodetic Survey
NIES
Nauru Island Effect Study
NIGEC
National Institute for Global Environmental Change
NILU
Norwegian Institute of Air Research
NIMFR
normal incidence multi-filter radiometer
NIP
normal incidence pyrheliometer
NIPA
nonlocal independent pixel approximation
NIR
near infrared
NIST
National Institute of Standards and Technology
NMC
National Meteorological Center
NNLS
non-negative least squares
NOAA
National Oceanic and Atmospheric Administration
NPP
Net Primary Productivity
NRB
normalized relative backscatter
NREL
National Renewable Energy Laboratory
NSA
North Slope of Alaska
NSA/AAO
North Slope of Alaska and Adjacent Arctic Ocean
NSB
North Slope Borough
NSF
National Science Foundation
NSIDC
National Snow and Ice Data Center
NSSL
National Severe Storms Laboratory
NTBC
narrow-to-broadband-conversion
NWO
Netherlands Organization for Scientific Research
NWP
numerical weather prediction
NWS
National Weather Service

O

OAII
Ocean-Atmosphere-Ice-Interactions
OC
organic carbon
OCS
Oklahoma Climatological Society
ODEQ
Oklahoma Department of Environmental Quality
OGP
Office of Global Programs
OKM
Oklahoma Mesonet
OLR
outgoing longwave radiation
OMT
ortho-mode transducer
OMWOG
Oceans-based Measurements Working Group
ONR
Office of Naval Research
OPC
optical particle counter
ORG
optical rain gauge
ORNL
Oak Ridge National Laboratory
ORR
Operational Readiness Review
OSSE
observation simulation system experiments

P

PA
photoacoustic
PABSI
profiling oxygen A-band spectrometer/visible integer
PAM
portable automated mesonet
PAR
Photosynthetically active radiation
PASS
Parameterization of Subgrid Scale
PBL
planetary boundary layer
PCASP
passive cavity aerosol spectrometer probe
PDF
probability distribution function
PDL
polarization diversity lidar
PGS
Precision Carbon Dioxide Mixing Ratio System or precision gas system
PI
principal investigator
PIF
problem identification form
PIR
precision infrared radiometer
PIRAQ
PC-integrated acquisition system
PMEL
Pacific Marine Environmental Laboratory
PML
perfectly matched layer
PMS
particle measuring system
PNNL
Pacific Northwest National Laboratory
POES
polar orbiting environmental satellite
PPA
plane parallel approximation
PPP
point-to-point protocol
PRB
Problem Review Board
PROBE
Pilot Radiation Observation Experiment
PROF
profile
PRR
pre-readiness review
PSAP
particle/soot absorption photometer
PSP
precision spectral pyranometer
PSU
Pennsylvania State University
PW
precipitable water
PWS
present weather sensor
PWV
precipitable water vapor

Q

QME
Quality Measurement Experiment

R

R/V
research vessel
re
effective radius
RACORO
Routine AAF Clouds with Low Optical Water Depths (CLOWD) Optical Radiative Observations
RAD
Radiation Measurements at AMF
RADAGAST
Radiative Divergence using AMF, GERB and AMMA Stations
RAMS
regional atmospheric modeling system
RAOB
radiosonde observation
RAPRAD
rapid radiation transfer model
RASS
radio acoustic sounding system
RCC
radiometer calibration and characterization
RCCL
Royal Caribbean Cruise Lines
RCF
radiometer calibration facility
RCS
remote cloud sensing
REBS
radiation energy balance system
RegCM2
regional climate model, Version 2 (NCAR)
RESET
Regional Service Team (TWP)
RF
radio frequency
RH
relative humidity
RHUBC
Radiative Heating in Underexplored Bands Campaign
RHUBC-II
Radiative Heating in Underexplored Bands Campaign, Phase II
RISCAM
Routine In Situ Cloud and Aerosol Measurements
RL
Raman lidar
rms
root mean square
ROM
rough order of magnitude
RPA
remotely piloted aircraft
RPV
remotely piloted vehicles
RRTM
rapid radiative transfer model
RSMAS
Rosenstiel School of Marine and Atmospheric Science
RSP
research scanning polarimeter
RSS
rotating shadowband spectroradiometer
RT
radiative transfer
RUC
rapid update cycle
RWP
radar wind profiler

S

SABL
scanning aerosol backscatter lidar
SAC
Site Advisory Committee
SAGE
Stratospheric Aerosol and Gas Experiment
SAIC
Science Application International Corporation
SAMEX
Storm and Mesoscale Ensemble Experiment
SAR
synthetic aperture radar
SARB
Surface and Atmospheric Radiation Budget
SAS
sub-arctic summer
SAW
sub-arctic winter
SBIR
Small Business Innovation Research (grant)
ScaRaB
Scanner for Radiation Budget
SCM
single-column model
SCNNLS
smoothness constrained non-negative least squares
SCOPE
San Clemente Ocean Probing Experiment
SDS
site data system
SEARCH
study of environmental Arctic change
SESI
Science and Engineering Services, Inc.
SGP
Southern Great Plains
SHDOM
Spherical Harmonic Discrete Ordinate Method
SHEBA
Surface Heat Budget of the Arctic Ocean (Subprogram of NSF ARCSS Oil)
SiB2
simple biosphere model
SINT
solar-infrared near-infrared technique
SIROS
solar and infrared observing system
SIRS
Solar Infrared Station
SIRTA
Site Instrumental de Recherche par Teled'etrection Armospherique
SISC
Science and Infrastructure Steering Committee
SIST
solar-infrared split-window technique
SITAC
Spectral Imagery Technology Applications Center
SKYRAD
sky radiometers on stand for downwelling radiation
SL
stable precipitation over land
SLR
scanning Raman lidar
SMET
Surface Meteorological Instruments for TWP
SMOS
Surface Meteorological Observing Station
SNL
Sandia National Laboratory
SNR
signal-to-noise ratio
SOL
site operations log
*Now known as metadata system (MDS)
SOPAC
South Pacific Applied Geoscience Commission
SORTI
solar radiance transmittance interferometer
SOW
statement of work
SPARTICUS
Small Particles in Cirrus
SPECTRE
Spectral Radiance Experiment
SPIE
Society of Photo-optic Instrumentation Engineers
SPM
site program manager
SPREP
South Pacific Regional Environmental Program
SRB
surface radiation budget
SRRB
Surface Radiation Research Branch (NOAA)
SSA
single-scattering albedo
SSEC
Space Science and Engineering Center
SSFR
solar spectral flux radiometer
SSM/I
special sensor microwave/imager
SSP
scanning spectral polarimeter
SST
sea-surface temperature
SSURGO
Soil Survey Geographic (database)
STEC
Science Team Executive Committee (no longer in use)
STORM-FEST
Stormscale Operational Research and Meteorology Fronts Experiment Systems Test
STORMVEX
Storm Peak Lab Cloud Property Validation Experiment
SUCCESS
Subsonic Aircraft Contrail and Cloud Effects Special Study
SUNY
State University of New York
SURFRAD
Surface Radiation Budget Network
SURTHREF
Surface Temperature and Humidity Reference System for Sondes
SW
shortwave
SWATS
soil water and temperature system
SWR
shortwave radiation
SWS
shortwave spectroradiometer
SWV
slant water vapor
SZA
solar zenith angle

T

TAO
Tropical Atmosphere Ocean
TC-RSR
thin-cloud rotating shadowband radiometer
TDDR
total direct diffuse radiometer
TDLAS
tunable diode laser absorption spectrometer
TDMA
time division multiple access (from ARM acronym list)
TEC
thermoelectric cooler
TEJ
tropical easterly jet
TES
tropospheric emission spectrometer
THOR
Thickness from Offbeam Returns
THORPEX
The Observing System Research and Predictability Experiment (no longer in use)
THWAPS
temperature, humidity, winds, and pressure system
TIMEX
Thunderstorm Initiation Mobile Experiment
TIPA
tilted independent pixel approximation
TIROS
television and infrared observation satellite
TIWE
Tropical Instability Wave Experiment
TKE
turbulent kinetic energy
TM
thematic mapper
TMI
Tropical Rainfall Measurement Mission (TRMM) Microwave Imager
TOA
top of the atmosphere
TOCS
Tropical Ocean Climate Study
TOGA-COARE
Tropical Ocean Global Atmosphere-Coupled Ocean Atmosphere Response Experiment
TOMS
total ozone mapping experiment spectrometer
TOVS
TIROS operational vertical sounder
TP
temperature profiling
TPS
total precipitation sensor
TRMM
Tropical Rainfall Measuring Mission
TROA
time-resolved optoacoustic (cell)
TSBR
total broadband radiometer
TSI
total sky imager
TUVR
total ultraviolet radiometer
TWP
Tropical Western Pacific
TWP-ICE
Tropical Warm Pool International Cloud Experiment
TWT
traveling wave tubes
TWTA
Traveling Wave Tube Amplifier

U

UAV
unmanned aerospace vehicle
UAV-AERI
miniaturized version of the ground-based AERI
UCAR
University Corporation for Atmospheric Research
UCLA
University of California, Los Angeles
UCSD
University of California, San Diego
UDF
UAV demonstration flights
UIC
Ukpeagvik Iñupiat Corporation
UIF
UAV interim flight
UIR
upwelling infrared radiometer
UNAVCO
University NAVSTAR Consortium
UNESCO
United Nations Education, Scientific, and Cultural Organization
UPS
uninterruptable power supply
URIP
University Research Instrumentation Program
USDA
U.S. Department of Agriculture
USGCRP
U.S. Global Change Research Program
USGS
U.S. Geological Survey
USN
U.S. Navy
USR
upwelling solar radiation
UV
ultraviolet
UVB
ultraviolet B
UVSR
ultraviolet spectral radiometer
UW-SSEC
University of Wisconsin Space Science and Engineering Center

V

VAD
velocity-azimuth display
VAMOS
Variability of the American Monsoon System
VAP
value-added product
VCEIL
Vaisala ceilometer
VDA
variational data assimilation
VIPS
video ice particle sampler
VIRS
visible infrared scanning radiometer
VIS
visible
VISST
visible infrared solar-infrared split-window technique
VOCALS
VAMOS Ocean-Cloud-Atmosphere-Land Study
VOCAR
variation of coastal atmospheric refractivity
VPD
vapor pressure deficit
VTLC
video time-lapsed camera
VZA
viewing zenith angle

W

WACR
w-band ARM cloud radar
WCR
Wyoming cloud radar
WCRP
World Climate Research Programme
WFOV
wide field of view
WHOI
Woods Hole Oceanographic Institution
WISG
World Infrared Standard Group
WISP
Winter Icing and Storms Project
WMO
World Meteorological Organization
WP
warm pool
WPDN
wind-profiler demonstration network
WPL
Wave Propagation Laboratory
WRC
World Radiation Center
WRF
Weather Research and Forecasting (Model)
WRR
World Radiometric Reference
WSFO
Weather Service Forecast Office
WSG
World Standard Group
WSI
whole sky imager
WSR-88D
weather surveillance radar-88 Dopplers
WV
water vapor
WVP
water vapor profiling
WVR
water vapor radiometer

X

XDC
External Data Center (ARM)

Y

YES
Yankee Environmental Systems

Z

ZSS
Zvenigorod Scientific Station
ZWD
zenith wet delay