{"id":"prognos-hrdps-realtime","title":"PROGNOS - Syst\u00e8me \u00e0 haute r\u00e9solution de pr\u00e9vision d\u00e9terministe (SHRPD) statistiquement post-trait\u00e9es par PROGNOS-MLR","description":"Le post-traitement statistique des pr\u00e9visions des mod\u00e8les num\u00e9riques du temps et de l'environnement, incluant le Syst\u00e8me \u00e0 haute r\u00e9solution de pr\u00e9vision d\u00e9terministe (SHRPD), permet de r\u00e9duire les biais syst\u00e9matiques et la variance de l'erreur des pr\u00e9visions brutes. Pour ce faire, des relations statistiques optimis\u00e9es entre les observations enregistr\u00e9es aux stations et les sorties des mod\u00e8les num\u00e9riques aux points de grilles \u00e0 proximit\u00e9 sont \u00e9tablies. Le syst\u00e8me PROGNOS est un progiciel d\u00e9velopp\u00e9 par Environnement et Changement climatique Canada permettant cela. Les relations sont b\u00e2ties par l'entremise de la m\u00e9thode 'Model Output Statistics' (MOS) et par r\u00e9gression lin\u00e9aire multiple (RLM). \u00c0 l'heure actuelle, seule la temp\u00e9rature de l'air \u00e0 1.5 m\u00e8tres au-dessus de la surface de la Terre est post-trait\u00e9e statistiquement. L'absence de pr\u00e9visions statistiquement post-trait\u00e9es peut \u00eatre d\u00fbe \u00e0 l'indisponibilit\u00e9 d'un mod\u00e8le statistique caus\u00e9 par une qualit\u00e9 ou quantit\u00e9 insuffisantes d'observations. La r\u00e9gion g\u00e9ographique couverte par ces donn\u00e9es inclut le territoire couvert par les stations m\u00e9t\u00e9orologiques du Canada et quelques bou\u00e9es am\u00e9ricaines. Pour le SHRPD, les pr\u00e9visions issues du post-traitement statistique sont disponibles \u00e0 la m\u00eame fr\u00e9quence d'\u00e9mission que les pr\u00e9visions brutes produites par les mod\u00e8les num\u00e9riques (ex. 00Z, 06Z, 12Z, 18Z) et \u00e0 des \u00e9ch\u00e9ances de pr\u00e9vision \u00e0 chaque heure, de 00 \u00e0 48 heures.","keywords":["Post-traitement statistique","Apprentissage machine","R\u00e9gression lin\u00e9aire multiple","PROGNOS","Pr\u00e9visions environnementales","Pr\u00e9visions aux points","Pr\u00e9visions m\u00e9t\u00e9orologiques","Temp\u00e9rature de l'air","Vent"],"links":[{"type":"text/html","rel":"canonical","title":"Donn\u00e9es GeoJSON du Syst\u00e8me \u00e0 haute r\u00e9solution de pr\u00e9vision d\u00e9terministe (SHRPD) statistiquement post-trait\u00e9es","href":"https://eccc-msc.github.io/open-data/msc-data/nwp_hrdps/readme_hrdps-statpostproc-datamart_fr/","hreflang":"fr-CA"},{"type":"application/json","rel":"root","title":"The landing page of this server as JSON","href":"https://api.weather.gc.ca?f=json"},{"type":"text/html","rel":"root","title":"The landing page of this server as HTML","href":"https://api.weather.gc.ca?f=html"},{"type":"application/json","rel":"self","title":"This document as JSON","href":"https://api.weather.gc.ca/collections/prognos-hrdps-realtime?f=json"},{"type":"application/ld+json","rel":"alternate","title":"This document as RDF (JSON-LD)","href":"https://api.weather.gc.ca/collections/prognos-hrdps-realtime?f=jsonld"},{"type":"text/html","rel":"alternate","title":"This document as HTML","href":"https://api.weather.gc.ca/collections/prognos-hrdps-realtime?f=html"},{"type":"application/schema+json","rel":"http://www.opengis.net/def/rel/ogc/1.0/schema","title":"Schema of collection in JSON","href":"https://api.weather.gc.ca/collections/prognos-hrdps-realtime/schema?f=json"},{"type":"text/html","rel":"http://www.opengis.net/def/rel/ogc/1.0/schema","title":"Schema of collection in HTML","href":"https://api.weather.gc.ca/collections/prognos-hrdps-realtime/schema?f=html"},{"type":"application/schema+json","rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables","title":"Queryables for this collection as JSON","href":"https://api.weather.gc.ca/collections/prognos-hrdps-realtime/queryables?f=json"},{"type":"text/html","rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables","title":"Queryables for this collection as HTML","href":"https://api.weather.gc.ca/collections/prognos-hrdps-realtime/queryables?f=html"},{"type":"application/geo+json","rel":"items","title":"Items as GeoJSON","href":"https://api.weather.gc.ca/collections/prognos-hrdps-realtime/items?f=json"},{"type":"application/ld+json","rel":"items","title":"Items as RDF (GeoJSON-LD)","href":"https://api.weather.gc.ca/collections/prognos-hrdps-realtime/items?f=jsonld"},{"type":"text/html","rel":"items","title":"Items as HTML","href":"https://api.weather.gc.ca/collections/prognos-hrdps-realtime/items?f=html"}],"extent":{"spatial":{"bbox":[[-149,40,-42,88]],"crs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84"},"temporal":{"interval":[["2025-07-24T00:00:00+00:00",null]]}},"itemType":"feature","crs":["http://www.opengis.net/def/crs/OGC/1.3/CRS84"],"storageCRS":"http://www.opengis.net/def/crs/OGC/1.3/CRS84"}