Acronym List


Acronym Full name Comments
I/ O input/output computer
I2L integrated injection logic computer unit, transister replacement
I&T integration and test
I/F interface
IA international angstrom
IAA International Academy of Astronautics
IAAC International Antarctic Analysis Center Australia
IACOMS International Advisory Committee on Marine Sciences UNESCO
IAD Dulles International Airport
IADB interactive ancillary data base
IAEA International Atomic Energy Agency
IAG International Association of Geodesy IUGG
IAG Interagency agreement
IAG Instrumentation Advisory Group
IAGA International Association of Geomagnetism and Aeronomy IUGG
IAGW International Acoustic Gravity Waves
IAHS International Association of Hydrological Sciences IUGG
IAMAPS International Association of Meteorology and Atmospheric Physics Sciences IUGG
IAMAS International Association of Meteorology and Atmospheric Sciences
IAP International Affiliates Program
IAPO International Association of Physical Oceanography IUGG
IAPSO International Association of Physical Sciences of the Ocean IUGG
IARP International Atmospheric Research Program NAS/NRC
IAS indicated air speed
IASH International Association of Scientific Hydrology IUGG
IASP International Atmospheric Surveillance Program NAS/NRC
IASPEI International Association of Seismology and Physics of the Earth's Interior IUGG
IATO Independent Acceptance Test Organization
IAU International Astronomical Union ICSU
IAV International Association of Volcanology IUGG
IAVCEI International Association of Volcanology and Chemistry of the Earth's Interior IUGG
IAWSP Intergrated Aviation Wind Shear Plan
IBM International Business Machines Corporation A well-known computer manufacturer; generally referred to by its initials only
IBM AT IBM Advanced Technology personal computer Known simply as an AT or an IBM PC AT
IBM PC   Generic term for IBM personal computers
IBM PS/2   One class of IBM personal computers
IBM RT   The IBM RISC Technology computer system
IBRD International Bank for Reconstruction and Development World Bank
ICA International Central Archive
ICAMR Interdepartmental Committee on Applied Meteorological Research
ICAO International Civil Aviation Organization
ICAR International Cooperation in Aviation Research
ICAS Interdepartmental Committee on Atmospheric Science FCST
ICAS Interdepartmental Communication for Atmospheric Science established by the Federal Council for Science & Technology in July 1959, Federal Coordinating Group/Meteorology
ICC Instrument Control Center
ICCP International Commission of Clouds and Precipitation
ICD Interface Control Document
ICDM International Commission on Dynamic Meteorology
ICE Intercomparison Experiment PAM
ICE Isoprene Closure Experiment
ICE Isoprene Canopy Experiment Oak Ridge, Tennessee
ICE International Cirrus Experiment now EUCREX
ICECOLORS Cold water component of WATERCOLORS NSF
ICES International Council for the Exploration of the Sea ICSU/LOSPAR
ICEX Ice Experiment Convened to outline the major problems in sea and land ice that could be addressed through satellite techniques
ICF Instrument Control Facility
ICFD Institute for Computational Fluid Dynamics University of Reading
ICG International Coordination Group ICITA
ICh Inter-Union Commission on the Lithosphere
ICITA International Cooperative Investigation of the Tropical Atlantic
ICh Inter-Union Commission on the Lithosphere
ICITA International Cooperative Investigation of the Tropical Atlantic
ICJOB IBM-to-Cray Interactive Interface
ICMAP CSMP now called CMAP
ICMSSR Interagency Committee for Meteorological Services and Supporting Research
ICMUA IAMAS Commission on the Meteorology of the Upper Atmosphere
ICN international communications network
ICO Interagency Committee on Oceanography
ICO Initial Operating Capability
ICPM International Commission on Polar Meteorology IAMAP and IUGG
ICS Intercom System
ICS Interdisciplinary Climate Systems
ICSI International Commission on Snow and Ice
ICSU International Council of Science
ICWF Interactive Computer Worded Forecast developed at the NWS Techniques Development Laboratory
ICWG International Coordinating Working Group
ICWWP Interagency Committee for World Weather Programs GARP
ID inside diameter
IDA Institute for Defense Analysis DOD
IDASS Integrated Data Assimilation/Sounding System
IDB immediate direct broadcast
IDCS image-dissector camera system
IDD Internet Data Distribution A software system developed by Unidata for distributing real-time data over the Internet. See also Local Data Manager (LDM)
IDEAS Instrumentation Development and Education in Airborne Science
IDD interface definition document
IDEA Lab Interactive's Digital Environmental Analysis Lab An interactive computer lab organized by the Naval Postgraduate School, Monterey, California
IDI Instrumentation Development and Intercomparisons AKP
IDL Interactive Display Language
IDL Interactive Data Language A commercial product from Research Systems, Inc.
IDL Interface Definition Language an industry standard defined by the Object Management Group
IDNDR International Decade for Natural Disaster Reduction
IDNHR International Decade of Natural Hazard Reduction
IDOE International Decade of Ocean Exploration NSF, 1970-1979
IDR incremental design review
IDS interdisciplinary study
IDS International Data Service A data stream that is part of the NWS Family of Services. IDS includes international data products analogous to the domestic products on the DDS
IEA International Energy Agency London, England
IEE Institute of Electrical Engineers
IEEE Institute of Electrical and Electronic Engineers Formerly IRE (Institute of Radio Engineers)
IEF Inventory Exchange Format
IEIS Integrated Earth Information Server An on-line repository of information pertaining to Earth-related sciences
IERS International Earth Rotation Service
IF intermediate frequency
IF in-flight
IFA Intensive Flux Array
IFAW International Fund for Animal Welfare
IFC Intensive Field Campaign
IFC InFlight Black Body Calibrator
IFD indirect flare detector
IFD in-flight deployment
IFEOS International Forum on Earth Observations Using Space Station Elements
IFIAS International Federation of Institutes for Advanced Study
IFOV instantaneous field of view
IFLOWS Integrated Flood Observing and Warning System
IFR instrument flight rules
IFREMER Institut Francais Re'checche pour L'Exploitation de la Mer French research institute for ocean utilization
IFYGL International Field Year for the Great Lakes
IGAC International Global Atmospheric Chemistry
IGACP International Global Atmospheric Chemistry Program
IGB International Geophysical Bulletin
IGBP International Geosphere-Biosphere Program ICSU
IGB International Geophysical Bulletin
IGC International Geophysical Cooperation 1939
IGE international group elements
IGFA Intergovernmental Funding Agency
IGOSS Integrated Global Ocean Station System GARP
IGPO International GEWEX Program Office
IGPP Institute of Geophysics and Planetary Physics University of California, La Jolla
IGU International Geographical Union
IGW internal gravity waves
IGY International Geophysical Year 1957-1958
IHOP International H2O Project
IHOP 2002 International H2O Project 2002
IIASA International Institute for Applied Systems Analysis Austria
IIOE International Indian Ocean Expedition
IIPS Interactive Information and Processing Systems [for Meteorology, Oceanography, and Hydrology] An annual conference sponsored by the AMS
IIT Illinois Institute of Technology
IITA Information Infrastructure Technology and Applications a UCAR program
IIV&V independent integration, verification, and validation
IIWG International Investigator Working Group
ILEC International Lake Environment Committee
ILI Instrumentation and Laboratory Improvement An NSF grant program
ILP International Lithosphere Programme
ILS instrument landing system
ILSS Integrated Logistics Support System
image   A two-dimensional array of data with values at each element of the array related to an intensity or a color.
IMAGe Institute for Mathematics Applied to the Geosciences
IMAGES intermediate model for the annual and global evolution of species
IMAGES Intermediate Model for the Annual and Global Evolution of Interactive Systems
IMAGES Intermediate Model of Global Evaluation of Species
IMC International Meteorological Center
IMD Indian Meteorology Department
IMEP International Meteorological Educational Program NAS/NRC, see IARP
IMF interplanetary magnetic field
IMOS Inadvertent Modification of the Stratosphere
IMP Interface message processor ARPANET
IMP Interplanetary Monitoring Platform
IMPROVE II Improvement of Cloud & Precipitation Physics in Mesoscale Models Ð 2nd generation
IMS International Magnetospheric Study NSF
IMS Information Management Service
IMS information management system
IMSL International Mathematical and Statistical Library
IMSP International Meteorological Service Program NAS/NRC, see IARP
IMU Inertial Measurement Unit
INDEX Indian Ocean Experiment 1975
INDOEX Indian Ocean Experiment
information server Software designed on the client/server model to allow people to share information (data, applications, images, etc) over the Internet Some standard information server applications include FTP, Gopher, and WWW
INFOTERRA international environmental research and referral service of UNEP
ingester In the context of the Unidata LDM, a program such as pqing that reads bytes from a data stream and creates data products
injection time In the context of the Unidata LDM, time when a data product is first injected into the IDD, an attribute of the data product that is preserved as it gets distributed to other IDD nodes
INO Institute for Naval Oceanography Bay St. Louis, Mississippi, a defunct organization once managed by UCAR
INPA Instituto Nacional de Pesquisas da Amazonia Manaus, Amazonas, Brazil
INPE Instituto de Pesquisas Espaciais Brazilian National Institute of Space Research in Sao Paulo, Brazil
input   The quantity to be measured (or modulated, or detected, or operated upon) that is received by an instrument.
INQUA International Quaternary Research Association or International Association on Quaternary Research 1965
INS Inertial Navigation System GARP
INSAT Indian National Satellite System India's geosynchronous satellite
INSTAAR Institute for Arctic and Alpine Research University of Colorado, Boulder
INSTEP Indonesian Seas Flow Through Experiment
INSU National Institute for Sciences of the Universe French
INTELSAT International Telecommunications Satellite
interface A common boundary between software systems or pieces of equipment a user interface is the software layer that sends messages to and receives commands from whomever is at the terminal/keyboard
Internet The collection of all interconnected computer networks around the globe that use the TCP/IP protocol For Unidata sites, NSFnet is the main connection to the Internet
INTEX NASA's Intercontinental Chemical Transport Experiment  
INU inertial navigation unit GARP
inversion   A departure from the usual decrease or increase with altitude of the value of an atmospheric property.
inversion layer   The layer through which this departure occurs.
I/O input/output
IOC Intergovernmental Oceanographic Commission UNESCO
IOC International Ozone Commission
IOC inception of contract
IOC initial operating capability
IOP intensive observation period
IOS Input/Output Subsystem
IOS interplanetary scintillation
IP Internet protocol The network layer for the TCP/IP protocol suite widely used to define how information is passed across the Internet
IPC Institute of Paper Chemistry
IPC Instrument Processing Center
IPCC Intergovernmental Panel on Climate Change WMO/UNEP
IPEI Ionospheric Plasma and Electrodynamics Instrument
IPM interpersonal messaging
IPMMI International Photolysis Measurements and Modeling Intercomparison
IPMP Intellectual Property Management Program (UCAR)
IPO International Programs Office NSF
IPOC International Partner Operations Center
IPOMS International Polar-Orbiting Meteorological Satellite Group
ips inches per second Not used in NCAR publications.
IPT Integrated Product Teams
IPU Instrument Processor Unit
IQSY International Years of the Quiet Sun 1964-1965
IQSY/EX International Quiet Years of the Sun Experiments India
IR Infrared
IR infrared
IR&D internal research and development
IR-RAD Infrared Radiometer
IRAC Interdepartmental Radio Advisory Committee
IRAS Infrared Astronomical Satellite
IRC International Research Council Superseded by ICSU
IRC International Radiation Commission IAMAP
IRCAT Infrared radiometer to detect (CAT) horizontal temperature gradients
IRCTR International Research Centre for Telecommunication-transmission and RADAR RADAR is weather related
IRD Instrument Requirement Document
IRD interface requirements document
IRE Institute of Radio Engineers Became IEEE
IRH Infrared hygrometer
IRI Interagency Research Internet
IRI International Research Institute for Climate Prediction
IRICP International Research Center for Climate Prediction
IRIG Inertial Rate (MIT) or Reference (NASA) Integrating Gyroscope
IRIG Inter-range Instrumentation Group USAF
IRIS infrared interferometer spectrometer
IRIS Incorporated Research Institutions for Seismology A consortium of 90+ institutions serving earth scientists' needs
IRIS Italian Research Interim Stage
IRJE Internet remote job entry
IRLS interrogation & reading location system
IRMS Isotope Ratio Mass Spectrometer
IRR Integrated Requirements Review
IR-RAD infrared radiometer
IRS Indian Remote-sensing Satellite
IRS Information Retrieval Service ESA
IS Institute Sponsors
ISA Instrument Society of America
ISAMS Improved stratospheric and mesospheric sounder NASA/UARS
ISAS Institute of Space and Astronautical Science Japan
ISBN International Standard Book Number
ISCAT Investigation of Sulfur Chemistry in Antarctic Troposphere  
ISCCP International Satellite Cloud Climatology Program GEWEX
ISDN Integrated Services Digital Network
ISF In-Situ Sensing Facility NCAR, EOL
ISF International Symposium on Forecasting
ISFF Integrated Surface Flux Facilities
ISG Immersion Sensing Group FOF
ISIS International Satellites for Ionospheric Studies NASA
ISLSCP International Satellite Land-Surface Climatology Project GEWEX
ISM in situ measurements ATD used ISM for In-Situ Measurements Project
ISMG International Scientific and Management Group GARP, WMO/IESU
ISMP In-Situ Measurements Project
ISMRM Integrated Soil Moisture Retrieval Models
ISNAR International Service for National Agricultural Research
ISO International Standards Organization Established to promote international standards in scientific and technological fields
ISOC Integrated Science Operations Center
isolated system   A thermodynamic system that does not interact in any way with its surroundings.
ISOS International Southern Ocean Study
ISP Internet Service Provider
ISPAN Information Stream Project for AWIPS NOAAport An experimental data stream available from FSL
ISPRA   A village in Italy, nearest town is Varesse where The Joint Research Center of the Commission for the European Communites is located
ISR individual schedule request
ISRDB Incoherent Scatter Radar Data Base
ISRIC International Soil Reference and Information Centre
ISRO Indian Space Research Organization India
ISS Integrated Sounding System UCAR, NCAR, ATD
ISS Information Support Services
ISS Institute for Space Studies NASA
ISSE Institute for the Study of Society and the Environment No longer exists. See ISP (Integrated Science Program).
ISSN International Standard Serial Number
ISSS International Society of Soil Science
IST Instrument Support Terminal
ISTP International Solar Terrestrial Program NCAR's ATD uses International Solar Terrestrial Physics Program
ISTS Institute for Space and Terrestrial Science
ISU intermediate storage unit
ISUSS Integrated Surface and Upper-air Sounding System SSSF
ISWS Illinois State Water Survey
ISY International Space Year 1992
I&T integration and test
IT Information Transport
IT Information Technology UCAR, F&A
ITC Information Technology Council Chairman, Jack Fellows, UCAR
ITCT Inter-Continental Transport and Chemical Transformation
ITCZ intertropical convergence zone
ITIR Imaging Thermal Infrared
ITIR Intermediate Thermal Infrared Radiometer
ITM Ionosphere-Thermosphere-Mesosphere
ITO independent test organization
ITOS Improved Tiros Operational Satellite
ITPR Infrared temperature profile radiometer Nimbus F
ITR Institute Technical Reports UCAR, NCAR, HAO
ITS Instrument Technical Specification guides the HIRDLS construction team at Lockheed Martin
ITS/OT Institute for Telecommunications USDC/Boulder Laboratories
ITU International Telecommunications Union
ITVF Integration, Test, and Verification Facility
ITVM Integration, test, and verification model
ITWIS Integrated Terminal Weather Information System
ITWS Integrated Terminal Weather System
IUCR International Union of Crystallography ICSU
IUCRM Inter Union Commission on Radio Meteorology URSI/IUGG
IUE International Ultraviolet Explorer 1976, NASA, ESRO and Science Research Council of University of California
IUGG International Union of Geodesy and Geophysics UGGI in French ICSU
IUGS International Union of Geological Sciences ICSU
IUPAB International Union of Pure and Applied Biophysics ICSU
IUPAC International Union of Pure and Applied Chemistry ICSU
IUPAP International Union of Pure and Applied Physics ICSU
IUPS International Union of Physiological Sciences ICSU
IUTAM International Union of Theoretical and Applied Mechanics ICSU
IV&V independent verification and validation
IVVS Interactive Verification and Visualization System (RTVS)
IWC ice water content
IWG Implementation Working Group A Unidata advisory committee; disbanded in 1992
IWGDMGC Interagency Working Group on Data Management for Global Change
IWGGCDM International Working Group on Global Change and Data Management
IWGMFS International Working Group on Magnetic Field Satellites
IWRA International Water Resources Association
IWRS Improved Weather Reconnaissance System