ALGUNAS APLICACIONES RECIENTES DE LA TÉCNICA DE RADIO OCULTAMIENTO SATELITAL EN EL ESTUDIO DE PROCESOS ATMOSFÉRICOS
In the last years, the use of radio occultation (RO) technique to observe the terrestrial atmosphere and the climate takes advantage of the occultation of the Sun, the Moon, the stars and principally of artificial satellites of low height (LEO). In the latter case, crossed signs between LEO and GPS...
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Departamento de Geografía, Facultad de Humanidades, Universidad Nacional del Comahue
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ftdoajarticles:oai:doaj.org/article:f82f863fd99e41e2b12add07bcab337d 2023-05-15T13:57:20+02:00 ALGUNAS APLICACIONES RECIENTES DE LA TÉCNICA DE RADIO OCULTAMIENTO SATELITAL EN EL ESTUDIO DE PROCESOS ATMOSFÉRICOS Alejandro de la Torre Pedro Alexander Pablo Llamedo Rodrigo Hierro Horacio Pessano Andrés Odiard 2013-12-01T00:00:00Z https://doaj.org/article/f82f863fd99e41e2b12add07bcab337d EN ES eng spa Departamento de Geografía, Facultad de Humanidades, Universidad Nacional del Comahue http://170.210.83.53/htdoc/revele/index.php/geografia/article/view/60/59 https://doaj.org/toc/0326-1735 https://doaj.org/toc/2313-903X 0326-1735 2313-903X https://doaj.org/article/f82f863fd99e41e2b12add07bcab337d Boletín Geográfico, Vol 35, Pp 29-45 (2013) Radio Occultation Atmospheric Processes Water vapor Energy Geography. Anthropology. Recreation G Human ecology. Anthropogeography GF1-900 Environmental sciences GE1-350 article 2013 ftdoajarticles 2022-12-31T06:08:30Z In the last years, the use of radio occultation (RO) technique to observe the terrestrial atmosphere and the climate takes advantage of the occultation of the Sun, the Moon, the stars and principally of artificial satellites of low height (LEO). In the latter case, crossed signs between LEO and GPS satellites are used. The application of RO's technology using transmitters of the GPS system in high orbits and recipients on board of low orbit satellites, has provided profiles of atmospheric refractivity very precise. The basic idea of a RO is to observe how waves emitted by a GPS are propagated in the atmosphere. The ray trajectory associated to a radio wave between a GPS and a LEO, while these are hiding themselves mutually due to the interposition of the Earth, is deviated due to refractivity gradients. The ray bending angle is obtained from a change in the phase (Doppler shift) of the signal received by the LEO. Assuming spherical symmetry, the deviation information may be inverted by an Abel transformation to obtain a vertical profile of the index of refraction. From atmospheric profiles of refractivity and an atmospheric model, several parameters are obtained: from temperature (T), pressure, geopotential height and water vapor to minor species as aerosols, cloud liquid water and ionospheric electron density. The enormous advantage offered by the coverage in the whole planet, above the continental and oceanic territories, the 1K T resolution, the long term stability and mainly the absence of any restriction imposed by climatic conditions, makes the GPS RO technique unique among different remote sensing atmospheric systems. Up to now, hundreds of thousands of soundings have been processed, from the first satellites to recent (SAC-C, CHAMP, GRACE, COSMIC, TerraSAR-X, MetOp). In the present work, examples of global and regional water vapor and atmospheric wave energy distributions will be shown. It will be put on special emphasis on the mountainous regions of the Andes Range at middle latitudes and the Antarctic ... Article in Journal/Newspaper Antarc* Antarctic Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Spanish |
topic |
Radio Occultation Atmospheric Processes Water vapor Energy Geography. Anthropology. Recreation G Human ecology. Anthropogeography GF1-900 Environmental sciences GE1-350 |
spellingShingle |
Radio Occultation Atmospheric Processes Water vapor Energy Geography. Anthropology. Recreation G Human ecology. Anthropogeography GF1-900 Environmental sciences GE1-350 Alejandro de la Torre Pedro Alexander Pablo Llamedo Rodrigo Hierro Horacio Pessano Andrés Odiard ALGUNAS APLICACIONES RECIENTES DE LA TÉCNICA DE RADIO OCULTAMIENTO SATELITAL EN EL ESTUDIO DE PROCESOS ATMOSFÉRICOS |
topic_facet |
Radio Occultation Atmospheric Processes Water vapor Energy Geography. Anthropology. Recreation G Human ecology. Anthropogeography GF1-900 Environmental sciences GE1-350 |
description |
In the last years, the use of radio occultation (RO) technique to observe the terrestrial atmosphere and the climate takes advantage of the occultation of the Sun, the Moon, the stars and principally of artificial satellites of low height (LEO). In the latter case, crossed signs between LEO and GPS satellites are used. The application of RO's technology using transmitters of the GPS system in high orbits and recipients on board of low orbit satellites, has provided profiles of atmospheric refractivity very precise. The basic idea of a RO is to observe how waves emitted by a GPS are propagated in the atmosphere. The ray trajectory associated to a radio wave between a GPS and a LEO, while these are hiding themselves mutually due to the interposition of the Earth, is deviated due to refractivity gradients. The ray bending angle is obtained from a change in the phase (Doppler shift) of the signal received by the LEO. Assuming spherical symmetry, the deviation information may be inverted by an Abel transformation to obtain a vertical profile of the index of refraction. From atmospheric profiles of refractivity and an atmospheric model, several parameters are obtained: from temperature (T), pressure, geopotential height and water vapor to minor species as aerosols, cloud liquid water and ionospheric electron density. The enormous advantage offered by the coverage in the whole planet, above the continental and oceanic territories, the 1K T resolution, the long term stability and mainly the absence of any restriction imposed by climatic conditions, makes the GPS RO technique unique among different remote sensing atmospheric systems. Up to now, hundreds of thousands of soundings have been processed, from the first satellites to recent (SAC-C, CHAMP, GRACE, COSMIC, TerraSAR-X, MetOp). In the present work, examples of global and regional water vapor and atmospheric wave energy distributions will be shown. It will be put on special emphasis on the mountainous regions of the Andes Range at middle latitudes and the Antarctic ... |
format |
Article in Journal/Newspaper |
author |
Alejandro de la Torre Pedro Alexander Pablo Llamedo Rodrigo Hierro Horacio Pessano Andrés Odiard |
author_facet |
Alejandro de la Torre Pedro Alexander Pablo Llamedo Rodrigo Hierro Horacio Pessano Andrés Odiard |
author_sort |
Alejandro de la Torre |
title |
ALGUNAS APLICACIONES RECIENTES DE LA TÉCNICA DE RADIO OCULTAMIENTO SATELITAL EN EL ESTUDIO DE PROCESOS ATMOSFÉRICOS |
title_short |
ALGUNAS APLICACIONES RECIENTES DE LA TÉCNICA DE RADIO OCULTAMIENTO SATELITAL EN EL ESTUDIO DE PROCESOS ATMOSFÉRICOS |
title_full |
ALGUNAS APLICACIONES RECIENTES DE LA TÉCNICA DE RADIO OCULTAMIENTO SATELITAL EN EL ESTUDIO DE PROCESOS ATMOSFÉRICOS |
title_fullStr |
ALGUNAS APLICACIONES RECIENTES DE LA TÉCNICA DE RADIO OCULTAMIENTO SATELITAL EN EL ESTUDIO DE PROCESOS ATMOSFÉRICOS |
title_full_unstemmed |
ALGUNAS APLICACIONES RECIENTES DE LA TÉCNICA DE RADIO OCULTAMIENTO SATELITAL EN EL ESTUDIO DE PROCESOS ATMOSFÉRICOS |
title_sort |
algunas aplicaciones recientes de la técnica de radio ocultamiento satelital en el estudio de procesos atmosféricos |
publisher |
Departamento de Geografía, Facultad de Humanidades, Universidad Nacional del Comahue |
publishDate |
2013 |
url |
https://doaj.org/article/f82f863fd99e41e2b12add07bcab337d |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Boletín Geográfico, Vol 35, Pp 29-45 (2013) |
op_relation |
http://170.210.83.53/htdoc/revele/index.php/geografia/article/view/60/59 https://doaj.org/toc/0326-1735 https://doaj.org/toc/2313-903X 0326-1735 2313-903X https://doaj.org/article/f82f863fd99e41e2b12add07bcab337d |
_version_ |
1766264965355798528 |