{"id":56,"date":"2026-07-02T22:12:56","date_gmt":"2026-07-02T20:12:56","guid":{"rendered":"http:\/\/s603816833.onlinehome.fr\/?page_id=56"},"modified":"2026-07-30T13:30:42","modified_gmt":"2026-07-30T11:30:42","slug":"spacialized-ghi-gti","status":"publish","type":"page","link":"http:\/\/www.calibsun.com\/de\/solar-irradiance\/spacialized-ghi-gti\/","title":{"rendered":"Expertise | Spacialized GHI &amp; GTI"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"56\" class=\"elementor elementor-56\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1f07c4a6 e-con-full e-flex e-con e-parent\" data-id=\"1f07c4a6\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-64702ddc e-con-full e-flex e-con e-child\" data-id=\"64702ddc\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;background_motion_fx_motion_fx_scrolling&quot;:&quot;yes&quot;,&quot;background_motion_fx_scale_effect&quot;:&quot;yes&quot;,&quot;background_motion_fx_scale_speed&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:3,&quot;sizes&quot;:[]},&quot;background_motion_fx_scale_range&quot;:{&quot;unit&quot;:&quot;%&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:{&quot;start&quot;:50,&quot;end&quot;:100}},&quot;background_motion_fx_scale_direction&quot;:&quot;out-in&quot;,&quot;background_motion_fx_devices&quot;:[&quot;desktop&quot;,&quot;laptop&quot;,&quot;tablet_extra&quot;,&quot;tablet&quot;,&quot;mobile&quot;]}\">\n\t\t<div class=\"elementor-element elementor-element-74778e8e e-con-full e-flex e-con e-child\" data-id=\"74778e8e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2241535a elementor-icon-list--layout-inline elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"2241535a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items elementor-inline-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Calibsun | Expertise<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1228070a elementor-widget elementor-widget-heading\" data-id=\"1228070a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\"><span class=\"color-orange\">Irradiance Spatialisation<\/span> for Large-Scale PV Plant <\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-433ef096 e-flex e-con-boxed e-con e-parent\" data-id=\"433ef096\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-2d03a3d6 e-con-full e-flex e-con e-child\" data-id=\"2d03a3d6\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-40d88fe5 e-con-full e-flex e-con e-child\" data-id=\"40d88fe5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-31cf4eeb elementor-widget-tablet__width-initial elementor-widget elementor-widget-heading\" data-id=\"31cf4eeb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">One point GHI data is not enough for PV plants above 50MWp<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-32cab0da e-con-full e-flex e-con e-child\" data-id=\"32cab0da\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-31599dfe text-pretty elementor-widget elementor-widget-text-editor\" data-id=\"31599dfe\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">On utility-scale photovoltaic plants above 50 MWp, <strong>a single pyranometer cannot represent the solar radiation reaching the modules.<\/strong> As footprints scale from hundreds of megawatts to several gigawatts, irradiance becomes spatially heterogeneous across the land surface.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-67745a84 e-flex e-con-boxed e-con e-parent\" data-id=\"67745a84\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;gradient&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-2eeea4d9 e-con-full e-flex e-con e-child\" data-id=\"2eeea4d9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-31440a9a elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"31440a9a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"682\" src=\"https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/Export_GHI-spatial-43-1024x873.png\" class=\"attachment-large size-large wp-image-1511\" alt=\"\" srcset=\"https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/Export_GHI-spatial-43-1024x873.png 1024w, https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/Export_GHI-spatial-43-300x256.png 300w, https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/Export_GHI-spatial-43-768x655.png 768w, https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/Export_GHI-spatial-43-1536x1309.png 1536w, https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/Export_GHI-spatial-43-14x12.png 14w, https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/Export_GHI-spatial-43.png 1552w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-22438b96 e-con-full e-flex elementor-invisible e-con e-child\" data-id=\"22438b96\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;fadeInRight&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f3aade elementor-widget elementor-widget-heading\" data-id=\"f3aade\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"color-orange\">A passing cloud rarely shades<\/span> the full site at once<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2bd11918 elementor-widget elementor-widget-text-editor\" data-id=\"2bd11918\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Production drops occur locally while other sections remain under clear sky. <strong>A<\/strong> <strong>pyranometer\u00a0captures one location only.<\/strong> It misses these complex spatial patterns and weakens the correlation between measured GHI (Global Horizontal Irradiance) and actual energy output.<\/span><\/p><p><span style=\"font-weight: 400;\">This limitation is now recognized by the IEA PVPS Task 16 guidelines, which recommend approximately one GHI measurement per 10 MWp to characterize the irradiance field across large installations. In practice, most forecasting providers rely solely on satellite resources and ignore this density of ground data. None exploit it through a rigorous spatial analysis.<\/span><\/p><p><span style=\"font-weight: 400;\"><strong>CalibSun is the only provider that natively integrates on-site data and performs true GHI spatialization.<\/strong> The method is based on internal scientific research, validated through exchanges with a main contributor to IEA Task 16, and applied operationally on large-scale plants.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1518aa6 e-con-full e-flex e-con e-child\" data-id=\"1518aa6\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-b750ccd e-con-full e-flex elementor-invisible e-con e-child\" data-id=\"b750ccd\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;fadeInLeft&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fd514d7 elementor-widget elementor-widget-heading\" data-id=\"fd514d7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">CalibSun's geospatial approach to <span class=\"color-orange\">irradiance spatialisation<\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-11d679a elementor-widget elementor-widget-text-editor\" data-id=\"11d679a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">CalibSun has designed a GHI spatialization methodology to close this gap. The process does not require a fixed number of pyranometers. It requires the precise location of each sensor across the plant as its primary input.<\/span><\/p><p><span style=\"font-weight: 400;\">Once sensor positions are known, <strong>CalibSun applies geospatial and geostatistical methods to model the covariance (the spatial variability) between each pair of sensors.<\/strong> This step quantifies how irradiance at one point relates to conditions elsewhere on the site surface.<\/span><\/p><p><span style=\"font-weight: 400;\"><strong>CalibSun then applies kriging, a geostatistical interpolation method, to estimate local irradiance across the full plant footprint.<\/strong> The configuration of the sensor network defines the accuracy of this estimate. The result is a continuous spatial representation of the irradiance field. From this surface model, computed grid square by grid square, a spatially averaged GHI is derived.<\/span><\/p><p><span style=\"font-weight: 400;\"><strong>This value reflects the true GHI of the plant far more accurately than any independent sensor.<\/strong> It produces a significantly stronger correlation with measured power production.<\/span><\/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-2cda415 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"2cda415\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"682\" src=\"https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/Export_GHI-spatial-44-1024x873.png\" class=\"attachment-large size-large wp-image-1759\" alt=\"\" srcset=\"https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/Export_GHI-spatial-44-1024x873.png 1024w, https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/Export_GHI-spatial-44-300x256.png 300w, https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/Export_GHI-spatial-44-768x655.png 768w, https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/Export_GHI-spatial-44-1536x1309.png 1536w, https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/Export_GHI-spatial-44-14x12.png 14w, https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/Export_GHI-spatial-44.png 1552w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\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<div class=\"elementor-element elementor-element-238c75f e-con-full e-flex e-con e-child\" data-id=\"238c75f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-39b2085 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"39b2085\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"745\" height=\"635\" src=\"https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/Export_GHI-spatial-46.jpg\" class=\"attachment-large size-large wp-image-2646\" alt=\"\" srcset=\"https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/Export_GHI-spatial-46.jpg 745w, https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/Export_GHI-spatial-46-300x256.jpg 300w, https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/Export_GHI-spatial-46-14x12.jpg 14w\" sizes=\"(max-width: 745px) 100vw, 745px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4df4c06 e-con-full e-flex elementor-invisible e-con e-child\" data-id=\"4df4c06\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;fadeInRight&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9dbeeef elementor-widget elementor-widget-heading\" data-id=\"9dbeeef\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">A decisive gain for <span class=\"color-orange\">very large plants<\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fa45ddb elementor-widget elementor-widget-text-editor\" data-id=\"fa45ddb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">The larger the plant, the more critical spatialization becomes. <strong>CalibSun considers the approach recommended from 50 MWp and mandatory above 100 MWp<\/strong>. At this scale, it marks a turning point in forecast quality.<\/span><\/p><p><span style=\"font-weight: 400;\">Only a spatialized irradiance field can capture the localized production drops caused by non-uniform cloud cover across spatial fields. Point GHI data systematically misrepresents these drops.<\/span><\/p><p><span style=\"font-weight: 400;\">By resolving spatial patterns and short-term variability, <strong>GHI or GTI spatialization improves both short-term forecasting and day-ahead forecasting<\/strong>. The impact is direct: more accurate scheduling, sharper trading positions, and better-informed grid-balancing decisions.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c2e9b8c e-con-full e-flex e-con e-parent\" data-id=\"c2e9b8c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-cdc391b e-con-full e-flex e-con e-child\" data-id=\"cdc391b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-688c3c0 e-flex e-con-boxed e-con e-child\" data-id=\"688c3c0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-b0c7d30 e-flex e-con-boxed e-con e-child\" data-id=\"b0c7d30\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-48969c4 e-con-full e-flex e-con e-child\" data-id=\"48969c4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-18a7e73 elementor-widget elementor-widget-heading\" data-id=\"18a7e73\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Innovative internal research <br>applied in the field on+1.4GWp solar plant<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b91429f e-grid e-con-full e-con e-child\" data-id=\"b91429f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-35bb639 e-con-full e-flex e-con e-child\" data-id=\"35bb639\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f413eed elementor-widget__width-inherit elementor-widget elementor-widget-image\" data-id=\"f413eed\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"265\" height=\"288\" src=\"https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/solar-academic.png\" class=\"attachment-large size-large wp-image-2450\" alt=\"\" srcset=\"https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/solar-academic.png 265w, https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/solar-academic-11x12.png 11w\" sizes=\"(max-width: 265px) 100vw, 265px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-88ecb75 elementor-widget elementor-widget-heading\" data-id=\"88ecb75\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">A CalibSun exclusive <\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-23b6bce elementor-widget elementor-widget-text-editor\" data-id=\"23b6bce\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>CalibSun is the only forecasting provider applying true GHI spatialization at this scale.\u00a0<strong>The principle aligns with IEA PVPS Task 16,<\/strong>\u00a0yet its operational implementation remains rare across the industry.<\/p><p><strong>The technology stems from CalibSun&#8217;s internal research and was presented at ICEM 2025<\/strong>\u00a0(International Conference on Energy &amp; Meteorology), confirming its scientific maturity. It is deployed on some of the most demanding sites worldwide, including a +1.4 GW solar plant in India where monsoon-driven cloud variability makes irradiance modeling exceptionally difficult.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f799185 elementor-align-right elementor-widget elementor-widget-button\" data-id=\"f799185\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"http:\/\/www.calibsun.com\/de\/scientific-publications\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Our scientic publications<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-688f5561 e-con-full e-flex e-con e-parent\" data-id=\"688f5561\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;gradient&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3b8221aa elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"3b8221aa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"721\" height=\"868\" src=\"https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/frequently-asked-question-3.webp\" class=\"attachment-large size-large wp-image-1901\" alt=\"\" srcset=\"https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/frequently-asked-question-3.webp 721w, https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/frequently-asked-question-3-249x300.webp 249w, https:\/\/www.calibsun.com\/wp-content\/uploads\/2026\/07\/frequently-asked-question-3-10x12.webp 10w\" sizes=\"(max-width: 721px) 100vw, 721px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7e59524d e-con-full e-flex e-con e-child\" data-id=\"7e59524d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-6ae74b05 e-con-full e-flex e-con e-child\" data-id=\"6ae74b05\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5e0cfd39 elementor-icon-list--layout-inline elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"5e0cfd39\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items elementor-inline-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Questions<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7d9ccbb7 elementor-widget elementor-widget-heading\" data-id=\"7d9ccbb7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Frequently Asked Questions about Spacialized GHI &amp; GTI<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-46bf8d8 elementor-widget elementor-widget-n-accordion\" data-id=\"46bf8d8\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;default_state&quot;:&quot;all_collapsed&quot;,&quot;max_items_expended&quot;:&quot;one&quot;,&quot;n_accordion_animation_duration&quot;:{&quot;unit&quot;:&quot;ms&quot;,&quot;size&quot;:400,&quot;sizes&quot;:[]}}\" data-widget_type=\"nested-accordion.default\">\n\t\t\t\t\t\t\t<div class=\"e-n-accordion\" aria-label=\"Accordion. Open links with Enter or Space, close with Escape, and navigate with Arrow Keys\">\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-7410\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"1\" tabindex=\"0\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-7410\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><h3 class=\"e-n-accordion-item-title-text\"> What is GHI spatialisation? <\/h3><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"40\" height=\"40\" viewBox=\"0 0 40 40\" fill=\"none\"><path d=\"M24.6998 11.6351L31.5103 27.0167C32.1857 28.5487 33.3677 30.1421 35 31L33.1989 31C30.3846 31 27.8518 29.2228 26.6135 26.4652L20.8724 13.1671C20.8724 13.1671 20.591 12.6769 20.0844 12.7382C19.5779 12.7382 19.2964 13.1671 19.2964 13.1671L13.5553 26.4652C12.3734 29.2228 9.78424 31 6.96998 31L5 31C6.63227 30.1421 7.81426 28.5487 8.48968 27.0167L15.3002 11.6351C16.0882 9.61282 18.7899 9 19.9719 9C21.1538 9 23.8555 9.55153 24.6435 11.6351L24.6998 11.6351Z\" fill=\"currentColor\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"40\" height=\"40\" viewBox=\"0 0 40 40\" fill=\"none\"><path d=\"M24.6998 28.3649L31.5103 12.9833C32.1857 11.4513 33.3677 9.85794 35 9L33.1989 9C30.3846 9 27.8518 10.7772 26.6135 13.5348L20.8724 26.8329C20.8724 26.8329 20.591 27.3231 20.0844 27.2618C19.5779 27.2618 19.2964 26.8329 19.2964 26.8329L13.5553 13.5348C12.3734 10.7772 9.78424 9 6.96998 9L5 9C6.63227 9.85794 7.81426 11.4513 8.48968 12.9833L15.3002 28.3649C16.0882 30.3872 18.7899 31 19.9719 31C21.1538 31 23.8555 30.4485 24.6435 28.3649L24.6998 28.3649Z\" fill=\"currentColor\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-7410\" class=\"elementor-element elementor-element-30c6b567 e-con-full e-flex e-con e-child\" data-id=\"30c6b567\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3abe044e elementor-widget elementor-widget-text-editor\" data-id=\"3abe044e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">GHI spatialization reconstructs the Global Horizontal Irradiance field across an entire solar plant rather than relying on point GHI data. Based on sensor location and geostatistical interpolation (kriging), it produces a continuous spatial representation of solar radiation and a spatially averaged GHI that correlates closely with real production.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-7411\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"2\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-7411\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><h3 class=\"e-n-accordion-item-title-text\"> Why is a single pyranometer not enough? <\/h3><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"40\" height=\"40\" viewBox=\"0 0 40 40\" fill=\"none\"><path d=\"M24.6998 11.6351L31.5103 27.0167C32.1857 28.5487 33.3677 30.1421 35 31L33.1989 31C30.3846 31 27.8518 29.2228 26.6135 26.4652L20.8724 13.1671C20.8724 13.1671 20.591 12.6769 20.0844 12.7382C19.5779 12.7382 19.2964 13.1671 19.2964 13.1671L13.5553 26.4652C12.3734 29.2228 9.78424 31 6.96998 31L5 31C6.63227 30.1421 7.81426 28.5487 8.48968 27.0167L15.3002 11.6351C16.0882 9.61282 18.7899 9 19.9719 9C21.1538 9 23.8555 9.55153 24.6435 11.6351L24.6998 11.6351Z\" fill=\"currentColor\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"40\" height=\"40\" viewBox=\"0 0 40 40\" fill=\"none\"><path d=\"M24.6998 28.3649L31.5103 12.9833C32.1857 11.4513 33.3677 9.85794 35 9L33.1989 9C30.3846 9 27.8518 10.7772 26.6135 13.5348L20.8724 26.8329C20.8724 26.8329 20.591 27.3231 20.0844 27.2618C19.5779 27.2618 19.2964 26.8329 19.2964 26.8329L13.5553 13.5348C12.3734 10.7772 9.78424 9 6.96998 9L5 9C6.63227 9.85794 7.81426 11.4513 8.48968 12.9833L15.3002 28.3649C16.0882 30.3872 18.7899 31 19.9719 31C21.1538 31 23.8555 30.4485 24.6435 28.3649L24.6998 28.3649Z\" fill=\"currentColor\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-7411\" class=\"elementor-element elementor-element-70b87059 e-con-full e-flex e-con e-child\" data-id=\"70b87059\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-48318126 elementor-widget elementor-widget-text-editor\" data-id=\"48318126\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">On large plants, cloud cover is rarely uniform. One pyranometer measures irradiance at a single location and misses localized production drops elsewhere. This weakens the link between measured GHI and actual output.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-7412\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"3\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-7412\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><h3 class=\"e-n-accordion-item-title-text\"> From what plant size does spatialization become necessary? <\/h3><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"40\" height=\"40\" viewBox=\"0 0 40 40\" fill=\"none\"><path d=\"M24.6998 11.6351L31.5103 27.0167C32.1857 28.5487 33.3677 30.1421 35 31L33.1989 31C30.3846 31 27.8518 29.2228 26.6135 26.4652L20.8724 13.1671C20.8724 13.1671 20.591 12.6769 20.0844 12.7382C19.5779 12.7382 19.2964 13.1671 19.2964 13.1671L13.5553 26.4652C12.3734 29.2228 9.78424 31 6.96998 31L5 31C6.63227 30.1421 7.81426 28.5487 8.48968 27.0167L15.3002 11.6351C16.0882 9.61282 18.7899 9 19.9719 9C21.1538 9 23.8555 9.55153 24.6435 11.6351L24.6998 11.6351Z\" fill=\"currentColor\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"40\" height=\"40\" viewBox=\"0 0 40 40\" fill=\"none\"><path d=\"M24.6998 28.3649L31.5103 12.9833C32.1857 11.4513 33.3677 9.85794 35 9L33.1989 9C30.3846 9 27.8518 10.7772 26.6135 13.5348L20.8724 26.8329C20.8724 26.8329 20.591 27.3231 20.0844 27.2618C19.5779 27.2618 19.2964 26.8329 19.2964 26.8329L13.5553 13.5348C12.3734 10.7772 9.78424 9 6.96998 9L5 9C6.63227 9.85794 7.81426 11.4513 8.48968 12.9833L15.3002 28.3649C16.0882 30.3872 18.7899 31 19.9719 31C21.1538 31 23.8555 30.4485 24.6435 28.3649L24.6998 28.3649Z\" fill=\"currentColor\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-7412\" class=\"elementor-element elementor-element-3ded888a e-con-full e-flex e-con e-child\" data-id=\"3ded888a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5a970d37 elementor-widget elementor-widget-text-editor\" data-id=\"5a970d37\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">CalibSun recommends it from 50 MWp and considers it mandatory above 100 MWp, where spatial variability strongly affects production.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-7413\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"4\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-7413\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><h3 class=\"e-n-accordion-item-title-text\"> What is kriging and why is it used? <\/h3><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"40\" height=\"40\" viewBox=\"0 0 40 40\" fill=\"none\"><path d=\"M24.6998 11.6351L31.5103 27.0167C32.1857 28.5487 33.3677 30.1421 35 31L33.1989 31C30.3846 31 27.8518 29.2228 26.6135 26.4652L20.8724 13.1671C20.8724 13.1671 20.591 12.6769 20.0844 12.7382C19.5779 12.7382 19.2964 13.1671 19.2964 13.1671L13.5553 26.4652C12.3734 29.2228 9.78424 31 6.96998 31L5 31C6.63227 30.1421 7.81426 28.5487 8.48968 27.0167L15.3002 11.6351C16.0882 9.61282 18.7899 9 19.9719 9C21.1538 9 23.8555 9.55153 24.6435 11.6351L24.6998 11.6351Z\" fill=\"currentColor\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"40\" height=\"40\" viewBox=\"0 0 40 40\" fill=\"none\"><path d=\"M24.6998 28.3649L31.5103 12.9833C32.1857 11.4513 33.3677 9.85794 35 9L33.1989 9C30.3846 9 27.8518 10.7772 26.6135 13.5348L20.8724 26.8329C20.8724 26.8329 20.591 27.3231 20.0844 27.2618C19.5779 27.2618 19.2964 26.8329 19.2964 26.8329L13.5553 13.5348C12.3734 10.7772 9.78424 9 6.96998 9L5 9C6.63227 9.85794 7.81426 11.4513 8.48968 12.9833L15.3002 28.3649C16.0882 30.3872 18.7899 31 19.9719 31C21.1538 31 23.8555 30.4485 24.6435 28.3649L24.6998 28.3649Z\" fill=\"currentColor\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-7413\" class=\"elementor-element elementor-element-698c80c e-con-full e-flex e-con e-child\" data-id=\"698c80c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1022d9b0 elementor-widget elementor-widget-text-editor\" data-id=\"1022d9b0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Kriging is a geostatistical interpolation method that estimates values across a continuous surface from the covariance between known points. CalibSun uses it to produce an optimal, spatially averaged GHI across the plant.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<script type=\"application\/ld+json\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is GHI spatialisation?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"GHI spatialization reconstructs the Global Horizontal Irradiance field across an entire solar plant rather than relying on point GHI data. Based on sensor location and geostatistical interpolation (kriging), it produces a continuous spatial representation of solar radiation and a spatially averaged GHI that correlates closely with real production.\"}},{\"@type\":\"Question\",\"name\":\"Why is a single pyranometer not enough?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"On large plants, cloud cover is rarely uniform. 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CalibSun uses it to produce an optimal, spatially averaged GHI across the plant.\"}}]}<\/script>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Calibsun | Expertise Irradiance Spatialisation for Large-Scale PV Plant One point GHI data is not enough for PV plants above 50MWp On utility-scale photovoltaic plants above 50 MWp, a single pyranometer cannot represent the solar radiation reaching the modules. As footprints scale from hundreds of megawatts to several gigawatts, irradiance becomes spatially heterogeneous across the [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"parent":52,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-56","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"http:\/\/www.calibsun.com\/de\/wp-json\/wp\/v2\/pages\/56","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.calibsun.com\/de\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/www.calibsun.com\/de\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/www.calibsun.com\/de\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/www.calibsun.com\/de\/wp-json\/wp\/v2\/comments?post=56"}],"version-history":[{"count":0,"href":"http:\/\/www.calibsun.com\/de\/wp-json\/wp\/v2\/pages\/56\/revisions"}],"up":[{"embeddable":true,"href":"http:\/\/www.calibsun.com\/de\/wp-json\/wp\/v2\/pages\/52"}],"wp:attachment":[{"href":"http:\/\/www.calibsun.com\/de\/wp-json\/wp\/v2\/media?parent=56"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}