| Acronym | Meaning |
![](file.png) | IRAC | Interdepartmental Radio Advisory Committee |
![](file.png) | IRAS | Infrared Astronomical Satellite |
![](file.png) | IRC | International Research Council |
![](file.png) | IRC | International Radiation Commission |
![](file.png) | IRCAT | Infrared Radiometer To Detect (CAT) Horizontal Temperature Gradients |
![](file.png) | IRCTR | International Research Centre For Telecommunication-transmission And RADAR |
![](file.png) | IRD | Instrument Requirement Document |
![](file.png) | IRD | Interface Requirements Document |
![](file.png) | IRE | Institute Of Radio Engineers |
![](file.png) | IRH | Infrared Hygrometer |
![](file.png) | IRI | Interagency Research Internet |
![](file.png) | IRI | International Research Institute For Climate Prediction |
![](file.png) | IRICP | International Research Center For Climate Prediction |
![](file.png) | IRIG | Inertial Rate (MIT) Or Reference (NASA) Integrating Gyroscope |
![](file.png) | IRIG | Inter-range Instrumentation Group |
![](file.png) | IRIS | Infrared Interferometer Spectrometer |
![](file.png) | IRIS | Incorporated Research Institutions For Seismology |
![](file.png) | IRIS | Italian Research Interim Stage |
![](file.png) | IRJE | Internet Remote Job Entry |
![](file.png) | IRLS | Interrogation & Reading Location System |
![](file.png) | IRMS | Isotope Ratio Mass Spectrometer |
![](file.png) | IRR | Integrated Requirements Review |
![](file.png) | IRS | Indian Remote-sensing Satellite |
![](file.png) | IRS | Information Retrieval Service |
![](file.png) | IS | Institute Sponsors |
![](file.png) | ISA | Instrument Society Of America |
![](file.png) | ISAMS | Improved Stratospheric And Mesospheric Sounder |
![](file.png) | ISAS | Institute Of Space And Astronautical Science |
![](file.png) | ISBN | International Standard Book Number |
![](file.png) | ISCAT | Investigation Of Sulfur Chemistry In Antarctic Troposphere |
![](file.png) | ISCCP | International Satellite Cloud Climatology Program |
![](file.png) | ISDN | Integrated Services Digital Network |
![](file.png) | ISF | In-Situ Sensing Facility |
![](file.png) | ISF | International Symposium On Forecasting |
![](file.png) | ISFF | Integrated Surface Flux Facilities |
![](file.png) | ISG | Immersion Sensing Group |
![](file.png) | ISIS | International Satellites For Ionospheric Studies |
![](file.png) | ISLSCP | International Satellite Land-Surface Climatology Project |
![](file.png) | ISM | In Situ Measurements |
![](file.png) | ISMG | International Scientific And Management Group |
![](file.png) | ISMP | In-Situ Measurements Project |
![](file.png) | ISMRM | Integrated Soil Moisture Retrieval Models |
![](file.png) | ISNAR | International Service For National Agricultural Research |
![](file.png) | ISO | International Standards Organization |
![](file.png) | ISOC | Integrated Science Operations Center |
![](file.png) | ISOS | International Southern Ocean Study |
![](file.png) | ISP | Internet Service Provider |
![](file.png) | ISPAN | Information Stream Project For AWIPS NOAAport |
![](file.png) | ISPRA | N/A |
![](file.png) | ISR | Individual Schedule Request |