{"id":52,"date":"2017-07-07T11:06:08","date_gmt":"2017-07-07T11:06:08","guid":{"rendered":"http:\/\/snow.geus.dk\/?p=52"},"modified":"2017-07-07T11:06:08","modified_gmt":"2017-07-07T11:06:08","slug":"sentinel-2-and-sentinel-3-snow-optics-field-validation-at-col-du-lautaret-in-the-french-alps","status":"publish","type":"post","link":"http:\/\/snow.geus.dk\/index.php\/2017\/07\/07\/sentinel-2-and-sentinel-3-snow-optics-field-validation-at-col-du-lautaret-in-the-french-alps\/","title":{"rendered":"Sentinel-2 and Sentinel-3 snow optics field validation at Col du Lautaret, in the French Alps"},"content":{"rendered":"

Field measurements are essential for testing the performance of new algorithms and validating satellite remote sensing products. Among the validation sites chosen for the project, Col du Lautaret, in the French Alps is an ideal validation site, as it offers easy access and a variety of conditions to test the performance and limits of our algorithms.<\/p>\n

The site is located at approximately 2000 meters (6500 feet) a.s.l. , and is surrounded by high rugged mountains. At the col (mountain pass) itself, where a permanent automated weather station is located, the terrain consists of a (rather) flat plateau, surrounded by steeper slopes. Perfect for testing the complex terrain algorithms! Furthermore, the conditions of the alpine snowpack are in constant evolution over the winter season, which allow the team to test Sentinel 3 images for a wide range of snow types.<\/p>\n

\"2017-03-28-11-21-51\"<\/p>\n

(above) The automated weather station at Col du Lautaret, French Alps. (Photo: M. Lamare)<\/em><\/p>\n

During Spring 2017, the french team performed regular surface albedo measurements, coinciding with Sentinel 2 and 3 overpasses. Initially the data will be used to perform the characterisation of the validation site. Later in the project, the ground albedo measurements will be compared to the satellite acquisitions. Of course, more measurements will be taken… we just need to wait for the snow to return!<\/p>\n

\"p1180848\"<\/p>\n

(above) Measuring the albedo of fresh snow, using Solalb, developped at IGE, Grenoble. (Photo: M. Lamare)<\/em><\/p>\n

 <\/p>\n

\"2017-05-09-16-14-36\"<\/p>\n

(above)\u00a0Measuring the surface albedo of snow right until the end of the season. (Photo: M. Lamare)<\/em><\/p>\n

\"dessin\"<\/p>\n

(above)\u00a0Sentinel 2 and 3 images over the validation site. 11\/03\/2017. Source: ESA, Copernicus.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Field measurements are essential for testing the performance of new algorithms and validating satellite remote sensing products. Among the validation sites chosen for the project, Col du Lautaret, in the French Alps is an ideal validation site, as it offers easy access and a variety of conditions to test the performance and limits of our … Continue reading “Sentinel-2 and Sentinel-3 snow optics field validation at Col du Lautaret, in the French Alps”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[4],"tags":[],"jetpack_publicize_connections":[],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxG8S-Q","jetpack-related-posts":[{"id":15,"url":"http:\/\/snow.geus.dk\/index.php\/2016\/10\/28\/2-year-post-doctoral-position-in-snow-optical-remote-sensing-at-lgge\/","url_meta":{"origin":52,"position":0},"title":"2-year post-doctoral position in snow optical remote sensing at LGGE","date":"October 28, 2016","format":false,"excerpt":"This project is about monitoring snow properties evolution on the long-term using Sentinel satellite series at global scale. The successful candidates will evaluate and develop retrieval algorithms. The project will more specifically focus on two primary sites, one in Canada and the other one in the French Alps. Secondary sites\u2026","rel":"","context":"Similar post","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":36,"url":"http:\/\/snow.geus.dk\/index.php\/2017\/06\/22\/sentinel-2-at-the-lautaret-site\/","url_meta":{"origin":52,"position":1},"title":"Sentinel-2 at the Lautaret site","date":"June 22, 2017","format":false,"excerpt":"The col du Lautaret site, located in the heart of the French Alps, is used by the team as a validation target for the \"ESA SEOM Sentinel-3 for Science Land Study: Snow S-3-Snow\u201d\" project. 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