{"id":6099,"date":"2025-10-17T17:05:46","date_gmt":"2025-10-17T15:05:46","guid":{"rendered":"https:\/\/academiespatiale.fr\/?p=6099"},"modified":"2025-12-19T18:24:18","modified_gmt":"2025-12-19T17:24:18","slug":"seminaire-calibration-validation-du-radar-et-du-lidar-de-la-mission-earthcare","status":"publish","type":"post","link":"https:\/\/academiespatiale.fr\/index.php\/2025\/10\/17\/seminaire-calibration-validation-du-radar-et-du-lidar-de-la-mission-earthcare\/","title":{"rendered":"[S\u00e9minaire] Calibration \/ validation du radar et du lidar de la mission EarthCARE"},"content":{"rendered":"\n
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\n\t\t\tHome\n\t\t<\/span><\/div><\/div>\n<\/div>\n\n\n\n

Emmeline Fran\u00e7ois & Nathan Feuillard, donneront un s\u00e9minaire \u00ab Calibration \/ Validation du radar et du lidar de la mission EarthCARE \u00bb. Le s\u00e9minaire aura lieu \u00e0 11h30 le lundi 17 novembre au LATMOS \u00e0 Guyancourt en salle 2202 et sera retransmis sur Zoom.<\/strong><\/p>\n\n\n\n

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Calibration \/ Validation du radar et du lidar de la mission EarthCARE<\/strong>
Lundi 17 novembre 2025<\/strong> – 11h30<\/strong><\/p>\n\n\n\n

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LATMOS – Salle 2202
11, boulevard d’Alembert
Guyancourt<\/p>\n\n\n\n

En visioconf\u00e9rence<\/strong>
https:\/\/uvsq-fr.zoom.us\/j\/97846195388?pwd=0tFqa7pv2tvb3PahJvnkI74C4qKRmK.1<\/a>
ID de r\u00e9union: 978 4619 5388
Code secret: 365826<\/p>\n\n\n\n

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Abstract:<\/p>\n\n\n\n

FR :<\/strong><\/p>\n\n\n\n

Lanc\u00e9 le 28 mai 2024, le satellite EarthCARE (Earth Clouds Aerosols and Radiation Explorer) est un satellite d\u00e9velopp\u00e9 en collaboration entre l\u2019ESA et la JAXA. L\u2019objectif de la mission est d\u2019am\u00e9liorer notre compr\u00e9hension du bilan radiatif de la Terre et de ses effets sur le climat. \u00c9quip\u00e9 de 4 instruments (radar CPR, lidar ATLID, radiom\u00e8tre BBR, spectrom\u00e8tre MSI), le satellite mesure des profils verticaux de nuages et d\u2019a\u00e9rosols. Le LATMOS est impliqu\u00e9 dans la phase de calibration\/validation (Cal\/Val) du radar et du lidar qui fait suite au lancement. Ce travail est effectu\u00e9 \u00e0 partir de mesures a\u00e9roport\u00e9es et faites au sol.<\/p>\n\n\n\n

Lors des campagnes a\u00e9roport\u00e9es MAESTRO (Mesoscale organisation of tropical convection) et MORECALVAL (MObile Radar-Lidar-Radiometer EarthCare CAL\/VAL) des vols ont \u00e9t\u00e9 d\u00e9di\u00e9s \u00e0 la CalVal de EarthCARE. L\u2019avion de recherche ATR42 de SAFIRE (Service des Avions Fran\u00e7ais Instrument\u00e9s pour la Recherche en Environnement) a r\u00e9alis\u00e9 des vols sous la trace du satellite afin d\u2019\u00e9chantillonner la m\u00eame sc\u00e8ne que EarthCARE lors de son passage. A bord de l\u2019avion, les instruments de t\u00e9l\u00e9d\u00e9tection (radars RASTA, BASTA, lidar LNG et plateforme RALI) associ\u00e9s aux mesures in situ couvrant les a\u00e9rosols, les nuages et les pr\u00e9cipitations \u00e0 l’altitude de l’avion, permettent une validation quasi directe des produits CPR et ATLID, y compris les produits synergiques. Les instruments ont \u00e9chantillonn\u00e9 des conditions sp\u00e9cifiques \u00e0 chaque campagne : MAESTRO a fourni des conditions optimales pour les comparaisons lidars (LNG et ATLID) tandis que des conditions plus diversifi\u00e9es ont \u00e9t\u00e9 \u00e9chantillonn\u00e9es lors de MORECALVAL avec notamment la travers\u00e9e de nuages de glace, permettant la comparaison directe des r\u00e9flectivit\u00e9s mais aussi des restitutions du contenu en glace par les mesures insitu et du radar RASTA avec CPR. Des r\u00e9sultats de comparaison pour chacune des campagnes seront pr\u00e9sent\u00e9s lors de ce s\u00e9minaire.<\/p>\n\n\n\n

ACTRIS (Aerosol, Clouds and Trace gases Research Infrastructure) est une infrastructure Europ\u00e9enne de recherche produisant des donn\u00e9es de hautes qualit\u00e9s concernant les a\u00e9rosols et les nuages. De nombreux sites ACTRIS sont \u00e9quip\u00e9s avec des radars nuages, des lidar et des radiom\u00e8tres, instrumentation similaire \u00e0 celle d\u2019EarthCARE que l\u2019on pourrait alors assimiler \u00e0 un analogue spatial d\u2019un site ACTRIS. Au sein d\u2019ACTRIS, le CCRES (Centre for Cloud Remote Sensing) met en place des proc\u00e9dures et des m\u00e9thodes permettant de suivre la stabilit\u00e9 des instruments au sol. Le CCRES assure donc que des produits fiables et comparables sont disponibles pour chaque site. L\u2019infrastructure ACTRIS est donc utilis\u00e9e pour la CAL\/VAL d\u2019EarthCARE, notamment pour la validation des r\u00e9flectivit\u00e9s du CPR. La m\u00e9thode de comparaison des donn\u00e9es sol et satellite ainsi que les r\u00e9sultats en d\u00e9coulant seront pr\u00e9sent\u00e9s lors de ce s\u00e9minaire.<\/p>\n\n\n\n

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EN :<\/strong><\/p>\n\n\n\n

Launched on the 28th of may 2024 EarthCARE (Earth Clouds Aerosols and Radiation Explorer) is a satellite developped in collaboration between ESA and JAXA. The objective of the mission is to further our understanding of the radiation balance of Earth and it\u2019s effects on the climate. Equiped with 4 instruments: a radar (CPR), a lidar (ATLID), a radiometer (BBR) and a spectromer (MSI), the satellite mesures vertical profiles of clouds and aerosols. Following the launch a calibration\/validation (Cal\/Val) phase is still in progress. LATMOS has been involved in the Cal\/Val of both the radar and the lidar. This Cal\/Val work has been ungoing using airborne and ground data.<\/p>\n\n\n\n

Some flights of the airborne MAESTRO (Mesoscale organisation of tropical convection) and MORECALVAL (MObile Radar-Lidar-Radiometer EarthCARE CAL\/VAL) campaigns were dedicated to the EarthCARE Cal\/Val. The research plane ATR42 from SAFIRE (French Service of Instrumented Planes for Research and Environment) performed flights under the trace from the satellite to sample the same scene as EarthCARE. On board the plane are four instruments (radars: RASTA, BASTA, lidar: LNG and the RALI platform) associated to the measures of aerosols, clouds and precipitation at the plane altitude. This allows for quasi direct comparisons of CPR, ATLID and synergetic products. These instruments sampled specific conditions for each campaign: MAESTRO giving optimal conditions for lidar comparisons and MORECALVAL giving optimal conditions for radar reflectivity comparisons with passage through ice clouds. Results from both of these campaigns will be presented in this seminar. ACTRIS (Aerosol, Clouds and Trace gases Research Infrastructure) is a European research infrastructure producing high quality data and information on aerosols and clouds. Numerous ACTRIS sites are equipped with cloud radars, lidars and radiometers.  As this instrumentation is similar to EarthCARE\u2019s, the satellite can be seen as a space-based analog of an ACTRIS aerosol and cloud remote sensing observatory. Additionnaly, the ACTRIS Centre for Cloud Remote Sensing (CCRES) has established methodologies and procedures to manage and monitor the stability of the instrumentation. CCRES thus ensures that reliable and comparable products are available at each site. The ACTRIS infrastructure is then for EarthCARE\u2019s CAL\/VAL, in particular for the validation of CPR reflectivities. The comparison method of ground and satellite data and results from these comparisons will be presented in this seminar.<\/p>\n\n\n\n

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Emmeline Fran\u00e7ois & Nathan Feuillard, donneront un s\u00e9minaire \u00ab Calibration \/ Validation du radar et du lidar de la mission EarthCARE \u00bb. Le s\u00e9minaire aura lieu \u00e0 11h30 le lundi 17 novembre au LATMOS \u00e0 Guyancourt en salle 2202 et sera retransmis sur Zoom. Calibration \/ Validation du radar et du lidar de la […]<\/p>\n","protected":false},"author":1,"featured_media":6102,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_EventAllDay":false,"_EventTimezone":"","_EventStartDate":"","_EventEndDate":"","_EventStartDateUTC":"","_EventEndDateUTC":"","_EventShowMap":false,"_EventShowMapLink":false,"_EventURL":"","_EventCost":"","_EventCostDescription":"","_EventCurrencySymbol":"","_EventCurrencyCode":"","_EventCurrencyPosition":"","_EventDateTimeSeparator":"","_EventTimeRangeSeparator":"","_EventOrganizerID":[],"_EventVenueID":[],"_OrganizerEmail":"","_OrganizerPhone":"","_OrganizerWebsite":"","_VenueAddress":"","_VenueCity":"","_VenueCountry":"","_VenueProvince":"","_VenueState":"","_VenueZip":"","_VenuePhone":"","_VenueURL":"","_VenueStateProvince":"","_VenueLat":"","_VenueLng":"","_VenueShowMap":false,"_VenueShowMapLink":false,"footnotes":""},"categories":[14,29],"tags":[],"class_list":["post-6099","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-evenements","category-seminaire"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/academiespatiale.fr\/index.php\/wp-json\/wp\/v2\/posts\/6099","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/academiespatiale.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/academiespatiale.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/academiespatiale.fr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/academiespatiale.fr\/index.php\/wp-json\/wp\/v2\/comments?post=6099"}],"version-history":[{"count":5,"href":"https:\/\/academiespatiale.fr\/index.php\/wp-json\/wp\/v2\/posts\/6099\/revisions"}],"predecessor-version":[{"id":7309,"href":"https:\/\/academiespatiale.fr\/index.php\/wp-json\/wp\/v2\/posts\/6099\/revisions\/7309"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/academiespatiale.fr\/index.php\/wp-json\/wp\/v2\/media\/6102"}],"wp:attachment":[{"href":"https:\/\/academiespatiale.fr\/index.php\/wp-json\/wp\/v2\/media?parent=6099"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/academiespatiale.fr\/index.php\/wp-json\/wp\/v2\/categories?post=6099"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/academiespatiale.fr\/index.php\/wp-json\/wp\/v2\/tags?post=6099"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}