List of Abbreviations

This is a list of the most common abbreviations used on the ROM SAF webpage. For a more complete list we refer you to Eumetsat's list of acronyms and ESA's Metop Glossary List.

Num | A | B | C | D | E | F | G | H | I | J | K| L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

1D-VarOne-dimensional variational analysis
3D-VarThree-dimensional variational analysis
4D-VarFour-dimensional variational analysis
AAPP ATOVS and AVHRR processing package
ADD Architectural Design Document
AFG Administration and Finance Group (of EUMETSAT)
AIRS Atmospheric Infrared Sounder
AMSU Advanced Microwave Sounding Unit
AMV Atmospheric motion vector (satellite wind)
A/S Anti-Spoofing (a mode that the GPS satellites are usually in, which degrades the accuracy of pseudorange and carrier phase on the L2 signal)
ASCAT Advanced Scatterometer
ARS Assisted Raw Sampling
AVHRR Advanced Very High Resolution Radiometer (for visible and infrared imagery, flown in polar orbit)
BUFR Binary Universal Form for the Representation of meteorological data (A WMO standard data format for weather observations)
C/NOFSCommunications/Navigation Outage Forecasting System
CACooperation Agreements
CDAAC The COSMIC Data Analysis and Archive Center
CDOP Continous Development andn Operations Phase
CGMS Coordination Group for Meteorological Satellites
CGS Core Ground Segment
CHAMP Challenging Mini--Satellite Payload
CM Configuration Management
CM SAFClimate Monitoring SAF
CMP Configuration Management Plan
CNES Centre National d'Etudes Spatiales (of France)
COSMIC Constellation Observing System for Meteorology, Ionosphere and Climate
CT Canonical Transform
CT2 Canonical Transform (of type 2)
CVS Concurrent Version System
DADF Data Acquisition and Dissemination Facility
DCP Data Collection Platform
DD Double Differenceing
DD2 Double Differenceing (with two fiducial stations)
DMI Danish Meteorological Institute
DMSP Defense Meteorological Satellite Program (USA)
DoD US Department of Defense
DOPDetailed Operational Proposal
DPDDDetailed Products Description Document
DRIDelivery Readiness Inspection
DWD Deutscher Wetterdienst
E-GVAPEuropean GPS Water Vapour
ECMWF European Centre for Medium-Range Weather Forecasts
EDExtended Development
EDPExtended Development Phase
EGM96 Earth Gravity Model - 1996 (Lemoine et al, 1998)
EGOPS End-to-end GNSS Occultation Performance Simulator
ENVISAT Environmental Satellite
EOS Earth Observing System
Ephemeris A table showing a satellite's location over time
EPS EUMETSAT Polar Satellite System
EPS/PP EPS Preparatory Programme
EQUARSEquatorial Atmosphere Research Satellite
ERS European Remote Sensing satellite
ESA European Space Agency (Paris, France)
ESOC European Space Operations Centre (Darmstadt, Germany)
ESTEC European Space Research and Technology Centre (Noordwijk, The Netherlands)
EUCOSEUMETNET Network of European Observing System
EUMETCastEUMETSAT's dissemination system
EUMETSAT European Organisation for the Exploitation of Meteorological Satellites
EUMITS EUMETSAT on-line Invitation to Tender System
EURD End User Requirements Document
Fiducial Fiducial sites are fixed GPS receivers on the ground, against which data from the satellite can be differenced
FM Forward Model
FSIFull Spectrum Inversion
GALILEO European GNSS constellation project (EU)
GCOSGlobal Climate Observing System
GLONASS Global Navigation Satellite System (Russia)
GMES Global Monitoring for Environment and Security
GNSS Global Navigation Satellite System
GOES Geostationary Operational Environmental Satellite (USA)
GOME Global Ozone Monitoring Experiment
GPAC GNSS RO Processing and Archiving Centre (formerly GRAS Processing and Archiving Centre)
GPS Global Positioning System (USA)
GPS POD GPS Precise Orbit Determination products
GPS/MET GPS/Meteorology Experiment on Microlab-1 (USA)
GPSOS GPS Occultation Sensor
GPSPPGPS Processing Package
GPSWVGPS for Water Vapour
GRACEGravity Recovery and Climate Experiment
GRAS GNSS Receiver for Atmospheric Sounding
GRAS GSN Term used for the GRAS network of the fiducial ground stations
GRAS POD GRAS Precise Orbit Determination products
GRAS SAFFormer name of the ROM SAF
GSN Ground Support Network
GSN SSD Term used for the set of data from the GSN
GTS Global Telecommunication System
HIRLAM High Resolution Limited Area Model
HIRS High Resolution Infrared Radiation Sounder
HR High Rate data (used for data taken at a rate of 50 observations per second; these are used for measurement of the stratosphere and troposphere)
HRIT High Rate Information Transmission
HRPT High Rate Picture Transmission
IASI Infrared Atmospheric Sounding Interferometer
ICDInterface Control Document
IEEC Institut d'Estudis Espacials de Catalunya
IGOS Integrated Global Observation Strategy
IGS International Geodynamics Service
IJPS Initial Joint Polar System
IOPInitial Operational Proposal
ISO International Organization for Standardization
IUInteraction with Users
JPL Jet Propulsion Laboratory
JOPJoint Operation Procedure
KNMI Koninklijk Nederlands Meteorologisch Instituut
L1 GPS carrier frequency, 1575.42 MHz
L2 GPS carrier frequency, 1227.60 MHz
LEO Low Earth Orbit
LEOP Launch and Early Orbit Phase
LR Low Rate data (observations taken once every ten seconds, used to calculate the satellite's orbit)
LRIT Low Rate Information Transmission
LRPT Low Rate Picture Transmission
M&CManagement and Coordination
MARF Meteorological Archive and Retrieval Facility
Meteosat EUMETSAT geostationary meteorological satellite
MetO United Kingdom Meteorological Office (aka Met Office)
Metop Meteorological Operational Polar satellite (EUMETSAT Polar System spacecraft)
Metop POD Metop Precise Orbit Determination products
MHS Microwave Humidity Sounder
MPEF Meteorological Products Extraction Facility (EUMETSAT)
MSC Meteorological Service of Canada
MSG Meteosat Second Generation
MTP Meteosat Transition Programme
NASA National Aeronautics and Space Administration (USA)
NCAR National Center for Atmospheric Research, a division of UCAR
NESDIS National Environmental Satellite Data and Information Service (of NOAA)
NMC/NCEP National Meteorological Center / National Center for Environmental Prediction
NMS National Meteorological Service
NOAA National Oceanic and Atmospheric Administration (USA)
NPOESS National Polar-Orbiting Operational Environmental SAtellite System (NOAA)
NSPO Taiwan National Space Program Office
NRT Near real time
NWP Numerical Weather Prediction
OGS Overall Ground Segment
OICDOperational Interface Control Document
OLOpen Loop
OROperations Review
ORROperations Readiness Review
OSI SAFOcean & Sea-Ice SAF
PAC Policy Advisory Committee (of EUMETSAT)
PCRProducts Consolidation Review
PFSProduct Format Specification (EUMETSAT)
PGS Primary Ground Station
POD Precise Orbit Determination
PPProjects Plan
PPFProduct Processing Facility
PRN Pseudo-Random Noise (one of 32 possible "gold codes" assigned to each GPS satellite; the PRN number is used in this database to identify different GPS satellites)
PTProject Team
PVRProduct Validation Report
QI Quality Indicator
QC Quality Control
RINEX Receiver Independent Exchange Format (a standard file format for storing the observations of GPS receivers)
RMDCNRegional Meteorological Data Communication Network
RMS Root Mean Square
RO Radio Occultation
ROM SAFRadio Occultation Meteorology SAF (former GRAS SAF)
ROPP Radio Occultation Processing Package
RRRequirements Review
RTM Radiative Transfer Model
RTTOV Radiative Transfer model for TOVS
Rx Receiver
S/A Selective Availability (a mode that the GPS satellites are usually in, which degrades the accuracy of their signal for non-military users)
S/C Abbreviation for "spacecraft"
SAC-C Satelite de Aplicaciones Cientificas - C
SAF Satellite Application Facility (EUMETSAT)
SAG Science Advisory Group
SAR Synthetic Aperture Radar
SCIAMACHY Scanning Imaging Absorption Spectrometer for Atmospheric Cartography
SD Single Differencing
SEVIRI Spinning Enhanced Visible and Infrared Imager
SGSteering Group
SNR Signal to Noise Ratio
SPScience Plan
SRDSystem Requirements Document
SRNSystem/software Release Note
SSD Sounding Support Data
SST Sea-surface temperature
State Vector A collection of variables that can be uploaded to the satellite to set its state
STG Scientific and Technical Group (of EUMETSAT)
STRRSystem Test Results Review
SVN Identification number assigned to each GPS satellite
SVTRRSystem Validation Test Results Review
TBATo Be Added
TBCTo Be Confirmed
TBDTo Be Determined
TIROS Television and Infrared Observation Satellite
TLAThree Letter Acronym
TOA Top of the atmosphere
TOUGHTargeting Optimal Use of GPS Humidity Measurements in Meteorology
TOVS TIROS Operational Vertical Sounder
TZD Tropospheric (Total) Zenith Delay
UCAR University Corporation for Atmospheric Research
U-MARF Unified Meteorological Archive and Retrieval Facility. Former name of the EUMETSAT Data Centre.
UNAVCO University Navstar Consortium
UR User requirements
URDUser Requirements Document
UTC Universal Time Coordinated (in practice the same as Greenwich Mean Time)
VAR Variational analysis: 1D, 2D, 3D, or 4D variants (NWP assimilation technique)
VS Visiting Scientist
VSAVisiting Scientist Activity
WBSWork Breakdown Structure
WMO World Meteorological Organization
WPWork Package
WV Water vapour
ZD Zero Differencing
ZTD Zenith Tropospheric (Total) Delay

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