{"id":7663,"date":"2023-11-15T13:42:23","date_gmt":"2023-11-15T11:42:23","guid":{"rendered":"https:\/\/tethys.farm\/?p=7663"},"modified":"2023-11-15T14:19:53","modified_gmt":"2023-11-15T12:19:53","slug":"correccion-del-enmascaramiento-de-nubes-atmosfericas-2","status":"publish","type":"post","link":"https:\/\/tethys.farm\/es\/correccion-del-enmascaramiento-de-nubes-atmosfericas-2\/","title":{"rendered":"Preprocesamiento de im\u00e1genes de sat\u00e9lite: correcci\u00f3n atmosf\u00e9rica y enmascaramiento de nubes."},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"7663\" class=\"elementor elementor-7663\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7dd5430e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7dd5430e\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3a718e95\" data-id=\"3a718e95\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-353ef5b3 elementor-widget elementor-widget-text-editor\" data-id=\"353ef5b3\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>El <strong>sistema tetis<\/strong> procesa datos de observaci\u00f3n de la Tierra adquiridos por <strong>Sat\u00e9lites de la ESA<\/strong> (Sentinel 2a y 2b) y de<strong> NASA<\/strong> (Landsat 8 y 9) gracias a sensores \u00f3pticos de \u00faltima generaci\u00f3n. Los datos, es decir, las im\u00e1genes adquiridas, deber\u00e1n someterse a un procesamiento previo en relaci\u00f3n con el <strong>correcci\u00f3n atmosf\u00e9rica<\/strong> y el <strong>enmascaramiento de nubes<\/strong>.<\/p><p>\u00bfC\u00f3mo se adquieren los datos?<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6f1598f0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6f1598f0\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-b3d29d9\" data-id=\"b3d29d9\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4d378ea elementor-widget elementor-widget-text-editor\" data-id=\"4d378ea\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>EL <strong>sensores \u00f3pticos<\/strong> ellos miden el <strong>cantidad de luz solar reflejada<\/strong> desde la superficie terrestre en diferentes longitudes de onda.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-743bb397 elementor-widget elementor-widget-image\" data-id=\"743bb397\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"500\" src=\"https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-1-768x500.png\" class=\"attachment-medium_large size-medium_large wp-image-7665\" alt=\"\" srcset=\"https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-1-768x500.png 768w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-1-300x195.png 300w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-1-1024x667.png 1024w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-1-600x391.png 600w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-1-1x1.png 1w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-1-10x7.png 10w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-1.png 1066w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-89e5654 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"89e5654\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-7b487bd\" data-id=\"7b487bd\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d2fe017 elementor-widget elementor-widget-text-editor\" data-id=\"d2fe017\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align: left;\">El\u00a0<strong>radiaci\u00f3n electromagn\u00e9tica<\/strong>\u00a0del sol, en su viaje hasta la tierra y luego desde la tierra hasta el sensor, atraviesan la atm\u00f3sfera y\u00a0<strong>interactuar con mol\u00e9culas gaseosas<\/strong>, las part\u00edculas en suspensi\u00f3n y el aerosol que las compone, cambiando.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-31655b7\" data-id=\"31655b7\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e2c8f77 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"e2c8f77\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"716\" src=\"https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-2-768x716.png\" class=\"attachment-medium_large size-medium_large wp-image-7666\" alt=\"\" srcset=\"https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-2-768x716.png 768w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-2-300x280.png 300w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-2-600x560.png 600w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-2-1x1.png 1w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-2-10x10.png 10w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-2.png 834w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-06be3f6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"06be3f6\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-b0fbdb7\" data-id=\"b0fbdb7\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-39266f4 elementor-widget elementor-widget-text-editor\" data-id=\"39266f4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>All\u00e1 <strong>radiaci\u00f3n solar<\/strong> viene entonces <strong>Se modifica a su paso por la atm\u00f3sfera.<\/strong> (absorci\u00f3n y dispersi\u00f3n) por lo que es necesario realizar una <strong>correcci\u00f3n de datos<\/strong> que son liberadas por los sat\u00e9lites antes de que puedan ser procesadas, eliminando de las im\u00e1genes los efectos de la neblina luminosa, el vapor de agua, etc.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-35eb818 elementor-widget elementor-widget-image\" data-id=\"35eb818\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1384\" height=\"890\" src=\"https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-3.png\" class=\"attachment-full size-full wp-image-7668\" alt=\"\" srcset=\"https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-3.png 1384w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-3-300x193.png 300w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-3-1024x658.png 1024w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-3-768x494.png 768w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-3-600x386.png 600w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-3-1x1.png 1w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-3-10x6.png 10w\" sizes=\"auto, (max-width: 1384px) 100vw, 1384px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-b4fdb32 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b4fdb32\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-b7d918f\" data-id=\"b7d918f\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e619fc7 elementor-widget elementor-widget-text-editor\" data-id=\"e619fc7\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>El sistema TETHYS realiza la <strong>correcci\u00f3n atmosf\u00e9rica<\/strong> de im\u00e1genes de sat\u00e9lite <strong>usando<\/strong> precisamente el <strong>algoritmos desarrollados por la ESA<\/strong> (Caja de herramientas Sentinel-2; Sen2Cor) e <strong>por la NASA<\/strong> (C\u00f3digo de reflectancia de la superficie terrestre: LaSRC), por lo que <strong>Proporcionar a sus usuarios un procesamiento siempre fiable y consistente.<\/strong>.<\/p><p><strong>No todos los fen\u00f3menos atmosf\u00e9ricos pueden<\/strong> Sin embargo <strong>estar sujeto a correcci\u00f3n atmosf\u00e9rica<\/strong>, ya que en algunos casos (por ejemplo, capas de nubes m\u00e1s compactas y extendidas) la <strong>se\u00f1al de reflectancia<\/strong> se altera significativamente. Por lo tanto, es necesario operar un <strong>clasificaci\u00f3n de p\u00edxeles<\/strong> que componen una imagen, distinguiendo aquellas que no pueden ser utilizadas para el procesamiento debido a nubes (en gris en la figura inferior a la derecha) y sombras de nubes (en negro) de aquellas que no se ven afectadas por fen\u00f3menos atmosf\u00e9ricos severos (p\u00edxeles marrones en la figura) .<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6fe7e0f elementor-widget elementor-widget-image\" data-id=\"6fe7e0f\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1348\" height=\"660\" src=\"https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-4.png\" class=\"attachment-full size-full wp-image-7669\" alt=\"\" srcset=\"https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-4.png 1348w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-4-300x147.png 300w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-4-1024x501.png 1024w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-4-768x376.png 768w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-4-600x294.png 600w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-4-1x1.png 1w, https:\/\/tethys.farm\/wp-content\/uploads\/2023\/11\/correzione-atmosferica-cloud-masking-4-10x5.png 10w\" sizes=\"auto, (max-width: 1348px) 100vw, 1348px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-502c8ca elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"502c8ca\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6663cde\" data-id=\"6663cde\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-087eae7 elementor-widget elementor-widget-text-editor\" data-id=\"087eae7\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Cada imagen de sat\u00e9lite adquirida por TETHYS tambi\u00e9n se somete a <strong>enmascaramiento de nubes<\/strong> (enmascaramiento de nubes), con i <strong>p\u00edxeles identificados como &quot;alterados&quot;<\/strong> los cuales est\u00e1n marcados con color gris y no considerados en los distintos an\u00e1lisis.<br \/><br \/>Incluso en el caso del enmascaramiento de nubes, TETHYS utiliza algoritmos desarrollados por la ESA (Sen2Cor) y la NASA (Fmask y ATCOR) para proporcionar a sus usuarios procesamiento e im\u00e1genes siempre \u00fatiles y fiables.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>TETHYS realiza correcci\u00f3n atmosf\u00e9rica y enmascaramiento de nubes de im\u00e1genes de sat\u00e9lite para proporcionar siempre un procesamiento fiable y consistente.<\/p>","protected":false},"author":2,"featured_media":7670,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[84],"tags":[64,62,61,63,65],"class_list":["post-7663","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-scheda-tecnica","tag-agricoltura-4-0","tag-agricoltura-di-precisione","tag-monitoraggio-satellitare","tag-precision-farming","tag-satelliti"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.4 - 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