RF interference analisys in aperture synthesis interferometric radiometers: Application to L-band MIRAS instrument
Current spaceborne radiometers do not achieve the required spatial resolution demanded by the scientific community due to antenna-size technological limitations. In recent years, several space agencies have been studying aperture synthesis interferometric radiometers as a way of overcoming these lim...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2000 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/1977 |
| Acceso en línea: | https://hdl.handle.net/2117/1977 |
| Access Level: | acceso abierto |
| Palabra clave: | Boundary layer (Meteorology) Remote sensing applications Earth sciences Ocean circulation Radar Equipment and supplies Soil moisture Electromagnetic interference Electromagnetic compatibility geophysical techniques hydrological techniques oceanographic techniques radiofrequency interference radiometry remote sensing L-band MIRAS RF interference aperture synthesis interferometric radiometer geophysical measurement technique hydrology instrument jamming land surface microwave radiometry ocean satellite remote sensing sea surface salinity soil moisture spaceborne radiometry terrain mapping thermal noise emission Capa límit (Meteorologia) Sensors remots Ciències de la terra Circulació oceànica Radar Interferència electromàgnetica Compatibilitat electromagnètica Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció |
| Sumario: | Current spaceborne radiometers do not achieve the required spatial resolution demanded by the scientific community due to antenna-size technological limitations. In recent years, several space agencies have been studying aperture synthesis interferometric radiometers as a way of overcoming these limitations, which are more evident at low microwave frequencies (e.g., at L-band), where sea surface salinity and soil moisture can be monitored. Interference is an important issue in any remote sensing instrument, but it is crucial in microwave radiometers, since the signal being measured is the spontaneous thermal noise emission. Interference analyses already exist for classic radiometers. The objective of this paper is the analysis of RF interference on interferometric radiometers. The study involves the analysis of possible interference sources that may affect the performance of such systems at L-band: (1) nearby emissions from radars, non-Geo-Stationary Orbit (GSO) and Mobile Satellite Services (GSO-MSS), (2) harmonics of lower frequency emissions, and (3) possible jamming. |
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