{"id":45697,"date":"2021-04-20T11:35:13","date_gmt":"2021-04-20T11:35:13","guid":{"rendered":"https:\/\/nwp-saf.eumetsat.int\/site\/?page_id=45697"},"modified":"2026-04-28T08:04:41","modified_gmt":"2026-04-28T08:04:41","slug":"use-of-amvs-in-the-meteo-france-nwp-model","status":"publish","type":"page","link":"https:\/\/nwp-saf.eumetsat.int\/site\/monitoring\/winds-quality-evaluation\/amv\/amv-use-in-nwp\/use-of-amvs-in-the-meteo-france-nwp-model\/","title":{"rendered":"Use of AMVs in the Meteo France NWP model"},"content":{"rendered":"<h2>Use of AMVs in the Meteo France model<\/h2>\n\n<h3>Physical characteristics<\/h3>\n<h4>Global Model<\/h4>\n<ul>\n<li>Streched global model, spectral, semi-implicit semi-Lagrangien temporal scheme<\/li>\n<li>Horizontal resolution: T1798C2.2 (between T817 (25 km Gaussian grid) over the South Western Pacific and T3956 over Western Europe (5 km Gaussian grid))<\/li>\n<li>Vertical resolution: 105 vertical levels, pressure hybrid coordinate, between 10 meters near the surface and 0.05 hPa (70 km) to the top of the model<\/li>\n<\/ul>\n<h3>Data assimilation method<\/h3>\n<h4>Global Model<\/h4>\n<ul>\n<li>Analysis\u00a0 4D-VAR, 6 hr time window, T224\/T499 (40 km Gaussian grid) C1L105, full B-matrix flow dependent<\/li>\n<li>Time window: T\u00b1 3hr, Analysis times (T):00,06,12,18 Z<\/li>\n<li>Time constraints (model runtime):\n<ul>\n<li>Main forecast run: 50 min before time window ends (TWE) for T=00, at TWE for T=06, 1hr 10 min before TWE for T=12, at TWE for T=18<\/li>\n<li>Update run: 5 hr after TWE for T=00, 3 hr 50 min for T=06, 5 hr after TWE for T=12, 4 hr 17 min after TWE for T=18<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>AMV types assimilated<\/h3>\n<h4>Global Model<\/h4>\n<ul>\n<li>Meteosat-9 IR10.8, VIS0.75, VIS0.8, cloudy WV6.2, cloudy WV7.3<\/li>\n<li>Meteosat-10 IR10.8, VIS0.75, VIS0.8, cloudy WV6.2, cloudy WV7.3, backup Meteosat-11<\/li>\n<li>Himawari-9 IR 10.4, VIS0.6, cloudy WV6.2, 6.9 and 7.3, backup Himawari-8<\/li>\n<li>GOES-16 IR11.2, VIS0.65, cloudy WV6.2, backup GOES-17<\/li>\n<li>GOES-18 IR11.2, VIS0.65, cloudy WV6.2, backup GOES-17<\/li>\n<li>NESDIS and Direct Broadcast MODIS Terra IR10.7, cloudy\/clear sky WV6.8<\/li>\n<li>NESDIS and Direct Broadcast MODIS Aqua IR10.7, cloudy\/clear sky WV6.8<\/li>\n<li>NESDIS and Direct Broadcast AVHRR NOAA-15,18,19 IR<\/li>\n<\/ul>\n<h3>Global quality control<\/h3>\n<h4>Blacklisting in space<\/h4>\n<ul>\n<li>All geostationary winds beyond 62\u00b0 satellite zenith angle<\/li>\n<li>All geostationary winds over land below 700 hPa<\/li>\n<li>All geostationary winds over land north of 30N<\/li>\n<li>All geostationary winds between 55W and 100W, north of 30N<\/li>\n<li>All geostationary winds between 350 hPa and 800 hPa in the Extra-Tropics (polewards of 20 N\/S)<\/li>\n<li>All geostationary VIS winds above 700 hPa<\/li>\n<li>All geostationary cloudy WV winds below 400 hPa<\/li>\n<li>All geostationary clear sky WV winds<\/li>\n<li>All MODIS and NOAA winds over land below 700 hPa.<\/li>\n<li>All MODIS and NOAA IR winds over sea below 850 hPa.<\/li>\n<li>All MODIS cloudy and clear sky WV winds over sea below 700 hPa<\/li>\n<\/ul>\n<h4>QI thresholds<\/h4>\n<p>The table below is intended only as a guide to the QI thresholds used. Please see the section on blacklisting in space for specific details on which geographical areas are used.<\/p>\n<p>Note 1: no QI thresholds applied to polar data.<\/p>\n<p>Note 2: +5 added to QI threshold for satellites using QI2 (in 3-10-077 BUFR template, QI1 no longer available): GOES series, GOES-16 onwards<\/p>\n<table border=\"1\" width=\"100%\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td colspan=\"3\" rowspan=\"2\"><\/td>\n<td colspan=\"3\" align=\"center\" width=\"30%\">extratropics<\/td>\n<td colspan=\"3\" align=\"center\" width=\"30%\">tropics<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">HL<\/td>\n<td align=\"center\">ML<\/td>\n<td align=\"center\">LL<\/td>\n<td align=\"center\">HL<\/td>\n<td align=\"center\">ML<\/td>\n<td align=\"center\">LL<\/td>\n<\/tr>\n<tr class=\"dkpurplebkgnd\">\n<td rowspan=\"3\" align=\"center\">Geo<\/td>\n<td rowspan=\"3\" align=\"center\">QI1 (+5 if using QI2)<\/td>\n<td align=\"center\">IR<\/td>\n<td class=\"ltpurplebkgnd\" align=\"center\">85<\/td>\n<td class=\"ltpurplebkgnd\" align=\"center\">&#8211;<\/td>\n<td class=\"ltpurplebkgnd\" align=\"center\">85<\/td>\n<td align=\"center\">85<\/td>\n<td align=\"center\">85<\/td>\n<td align=\"center\">85<\/td>\n<\/tr>\n<tr class=\"dkpurplebkgnd\">\n<td align=\"center\">VIS<\/td>\n<td class=\"ltpurplebkgnd\" align=\"center\">&#8211;<\/td>\n<td class=\"ltpurplebkgnd\" align=\"center\">&#8211;<\/td>\n<td class=\"ltpurplebkgnd\" align=\"center\">85<\/td>\n<td align=\"center\">&#8211;<\/td>\n<td align=\"center\">&#8211;<\/td>\n<td align=\"center\">85<\/td>\n<\/tr>\n<tr class=\"dkpurplebkgnd\">\n<td align=\"center\">WV<\/td>\n<td class=\"ltpurplebkgnd\" align=\"center\">85<\/td>\n<td class=\"ltpurplebkgnd\" align=\"center\">&#8211;<\/td>\n<td class=\"ltpurplebkgnd\" align=\"center\">&#8211;<\/td>\n<td align=\"center\">90<\/td>\n<td align=\"center\">&#8211;<\/td>\n<td align=\"center\">&#8211;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p>tropics: 20S-20N<\/p>\n<p>extratropics: polewards of 20S\/N<\/p>\n<p>hl: 10-400 hPa<br \/>\nml: 400-700 hPa<br \/>\nll: 700-1000 hPa<\/p>\n<p>QI1 &#8211; EUMETSAT QI with first guess check<br \/>\nQI2 &#8211; EUMETSAT QI without first guess check<br \/>\nRFF &#8211; Recursive Filter Function (CIMSS\/NESDIS)<\/p>\n<p>For information on how the quality indicators are formulated see Holmlund (1998,\u00a0<i>Weather Forecasting<\/i>\u00a0<b>13<\/b>\u00a01093-1104) and Hayden and Purser (1995,\u00a0<i>Journal of Applied Meteorology<\/i>\u00a0<b>34<\/b>\u00a03-15).<\/p>\n<h4>Thinning<\/h4>\n<ul>\n<li>All winds thinned in 1.8\u00b0 by 1.8\u00b0 (on average, 92 % (70 %) of data have a neighbour further away than 0.9\u00b0 (1.35\u00b0)) by 10-175 hPa boxes. Vertical extent varying according to nearest standard pressure level. There are 16 vertical boxes.<\/li>\n<li>Wind selected by highest QI.<\/li>\n<li>Winds are assimilated in 30 minute time-slots.<\/li>\n<\/ul>\n<h4>Background check<\/h4>\n<ul>\n<li>Satellite wind observations undergo:\n<ul>\n<li>Background check: comparison with short-term forecast from previous model run.<\/li>\n<li>Asymmetry check: additional penalty applied to winds that under-report wind speed when compared with background field (FG) by more than 4 m\/s; the test gets increasingly tougher when the FG speed increases, up to 60 m\/s when all winds under-reporting by more than 4 m\/s are rejected; the test is however relaxed for low levels (pressure &gt; 700 hPa) and the Tropics.<\/li>\n<li>Variational quality control.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Observation errors<\/h3>\n<p>Observation errors<\/p>\n<table border=\"1\" width=\"70%\" cellspacing=\"0\" cellpadding=\"2\" align=\"center\">\n<tbody>\n<tr>\n<td align=\"center\">Satellite<\/td>\n<td align=\"center\">Level (hPa)<\/td>\n<td align=\"center\">1000<\/td>\n<td align=\"center\">925<\/td>\n<td align=\"center\">850<\/td>\n<td align=\"center\">700<\/td>\n<td align=\"center\">500<\/td>\n<td align=\"center\">400<\/td>\n<td align=\"center\">300<\/td>\n<td align=\"center\">250<\/td>\n<td align=\"center\">200<\/td>\n<td align=\"center\">150<\/td>\n<td align=\"center\">100<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">Meteosat\/GOES\/NOAA<\/td>\n<td align=\"center\">Error(m\/s)<\/td>\n<td align=\"center\">2.063<\/td>\n<td align=\"center\">2.063<\/td>\n<td align=\"center\">2.145<\/td>\n<td align=\"center\">2.310<\/td>\n<td align=\"center\">2.888<\/td>\n<td align=\"center\">3.218<\/td>\n<td align=\"center\">3.465<\/td>\n<td align=\"center\">3.630<\/td>\n<td align=\"center\">3.795<\/td>\n<td align=\"center\">3.795<\/td>\n<td align=\"center\">3.795<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">Himawari<\/td>\n<td align=\"center\">Error(m\/s)<\/td>\n<td align=\"center\">2.438<\/td>\n<td align=\"center\">2.438<\/td>\n<td align=\"center\">2.535<\/td>\n<td align=\"center\">2.730<\/td>\n<td align=\"center\">3.413<\/td>\n<td align=\"center\">3.803<\/td>\n<td align=\"center\">4.095<\/td>\n<td align=\"center\">4.290<\/td>\n<td align=\"center\">4.485<\/td>\n<td align=\"center\">4.485<\/td>\n<td align=\"center\">4.485<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">Himawari<\/td>\n<td align=\"center\">Error(m\/s)<\/td>\n<td align=\"center\">2.813<\/td>\n<td align=\"center\">2.813<\/td>\n<td align=\"center\">2.925<\/td>\n<td align=\"center\">3.150<\/td>\n<td align=\"center\">3.938<\/td>\n<td align=\"center\">4.388<\/td>\n<td align=\"center\">4.725<\/td>\n<td align=\"center\">4.950<\/td>\n<td align=\"center\">5.175<\/td>\n<td align=\"center\">5.175<\/td>\n<td align=\"center\">5.175<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<h3>History of changes<\/h3>\n<table border=\"0\" cellspacing=\"0\" cellpadding=\"2\">\n<tbody>\n<tr>\n<td>21\/03\/23<\/p>\n<td>Meteosat-10 replaces Meteosat-11 at Met-0 position (Meteosat-11 as backup).<br \/>\n<\/tr>\n<tr>\n<td>09\/01\/23<\/td>\n<td>Start using GOES-18 (GOES-W), GOES-17 stopped on 04\/01.<\/td>\n<\/tr>\n<tr>\n<td>13\/12\/22<\/td>\n<td>Switch from Himawari-8 to Himawari-9.<\/td>\n<\/tr>\n<tr>\n<td>29\/06\/22<\/td>\n<td>New operational NWP configuration with lot of changes regarding the global model (deep convection, air-sea fluxes, solar radiation, 1D sea-ice scheme)<\/td>\n<\/tr>\n<tr>\n<td>10\/06\/22<\/td>\n<td>Meteosat-9 activated in replacement of Meteosat-8, Meteosat-8 stopped on 01\/07.<\/td>\n<\/tr>\n<tr>\n<td>16\/02\/21<\/td>\n<td>Switch to 3-10-077 BUFR template for EUMETSAT product<br \/>\nas it was also informed for NESDIS (on 15\/01\/20).<\/td>\n<\/tr>\n<tr>\n<td>05\/05\/20<\/td>\n<td>Start using GOES-17 (GOES-W position)<\/td>\n<\/tr>\n<tr class=\"ltpurplebkgnd\">\n<td>02\/03\/20<\/td>\n<td>GOES-15 (GOES-W position) no longer used (satellite stop)<\/td>\n<\/tr>\n<tr>\n<td>15\/01\/20<\/td>\n<td>NOAA-20, GOES-17 winds monitored, switch to 3-10-077 BUFR template for NESDIS product (regarding GOES-16, GOES-17, NPP, NOAA-20)<\/td>\n<\/tr>\n<tr class=\"ltpurplebkgnd\">\n<td>02\/07\/19<\/td>\n<td>Increase of model resolution from T1198C2.2L105 to T1798C2.2L105, GOES-16 winds assimilation (GOES-E position)<\/td>\n<\/tr>\n<tr>\n<td>22\/02\/18<\/td>\n<td>Start using Meteosat-11 winds in Met-0 position (in replacement of Meteosat-10 winds product stopped on 06\/03\/18)<\/td>\n<\/tr>\n<tr class=\"ltpurplebkgnd\">\n<td>08\/01\/18<\/td>\n<td>GOES-13 stop (GOES-E position)<\/td>\n<\/tr>\n<tr>\n<td>05\/12\/17<\/td>\n<td>The geographical mask for geostationary satellites (+\/-50deg around the sub-satellite position) is replaced by a satellite zenith angle criteria<\/td>\n<\/tr>\n<tr class=\"ltpurplebkgnd\">\n<td>10\/03\/17<\/td>\n<td>Himawari-9 becomes the Himawari-8 backup (in replacement of MTSAT-2)<\/td>\n<\/tr>\n<tr>\n<td>01\/02\/17<\/td>\n<td>Start using Meteosat-8 on IODC position (in replacement of Meteosat-8 stopped on 31\/03\/17)<\/td>\n<\/tr>\n<tr class=\"ltpurplebkgnd\">\n<td>24\/03\/16<\/td>\n<td>MTSAT-2 becomes the Himawari-8 backup<\/td>\n<\/tr>\n<tr>\n<td>08\/12\/15<\/td>\n<td>Start using Himawari-8<\/td>\n<\/tr>\n<tr class=\"ltpurplebkgnd\">\n<td>13\/04\/15<\/td>\n<td>Increase of model resolution from T798C2.4L70 to T1198C2.2L105. Monitoring of EUMETSAT dual-MetOp AMVs (double mode)<\/td>\n<\/tr>\n<tr>\n<td>02\/07\/13<\/td>\n<td>Reduction of specified observation error of 17% for \u00c2\u00ab\u00c2\u00a0conventional\u00c2\u00a0\u00c2\u00bb observations including the AMVs.<\/td>\n<\/tr>\n<tr class=\"ltpurplebkgnd\">\n<td>24\/01\/13<\/td>\n<td>Switch from Meteosat-9 to Meteosat-10 winds.<\/td>\n<\/tr>\n<tr>\n<td>06\/12\/11<\/td>\n<td>Switch from GOES-11 to GOES-15 winds.<\/td>\n<\/tr>\n<tr class=\"ltpurplebkgnd\">\n<td>15\/12\/10<\/td>\n<td>Start using Direct Broadcast MODIS (Sodankyl\u00c3\u00a4, Fairbanks) and AVHRR NOAA-16,18,19 winds (Barrow, Rothera) through CIMSS\/Eumetcast link.<\/td>\n<\/tr>\n<tr>\n<td>24\/11\/10<\/td>\n<td>Start using NESDIS AVHRR NOAA-15,16,18,19 winds.<br \/>\nMonitoring Eumetsat Metop-2 winds<\/td>\n<\/tr>\n<tr class=\"ltpurplebkgnd\">\n<td>11\/08\/10<\/td>\n<td>Satellite change\u00a0 MTSAT-1R to MTSAT-2.<\/td>\n<\/tr>\n<tr>\n<td>14\/04\/10<\/td>\n<td>Satellite change GOES-12 to GOES-13 (GOES-E position).<\/td>\n<\/tr>\n<tr class=\"ltpurplebkgnd\">\n<td>06\/04\/10<\/td>\n<td>Increase of model resolution from T538C2.4L60 to T798C2.4.<br \/>\nReduction of specified observation error of 10% for all observations including the AMVs.<br \/>\nStart using Clear Sky Water-Vapor MODIS winds.<\/td>\n<\/tr>\n<tr>\n<td>04\/02\/09<\/td>\n<td>Start using Direct Broadcast MODIS winds (Tromso,Mc-Murdo) through CIMSS\/Eumetcast link.<\/td>\n<\/tr>\n<tr class=\"ltpurplebkgnd\">\n<td>06\/02\/08<\/td>\n<td>Increase of model resolution from T358C2.4L46 to T538C2.4L60.<\/td>\n<\/tr>\n<tr>\n<td>27\/03\/07<\/td>\n<td>Satellite change Met-8 to Met-9.<\/td>\n<\/tr>\n<tr class=\"ltpurplebkgnd\">\n<td>23\/01\/07<\/td>\n<td>Satellite change Met-5 to Met-7.<\/td>\n<\/tr>\n<tr>\n<td>22\/06\/06<\/td>\n<td>Start using Met-8 (after removal of Met-7).<br \/>\nStart using GOES-11 (replaces GOES-10 in GOES-W position).<br \/>\nStart using NESDIS MODIS Terra and Aqua winds.<br \/>\nSwitch from GOES-W\/E and MTSAT-1R SATOB to BUFR winds.<\/td>\n<\/tr>\n<tr class=\"ltpurplebkgnd\">\n<td>23\/01\/06<\/td>\n<td>Start using MTSAT-1R SATOB winds (after removal of GOES-9).<\/td>\n<\/tr>\n<tr>\n<td>21\/05\/03<\/td>\n<td>Start using GOES-9 SATOB winds (after removal of GMS-5).<\/td>\n<\/tr>\n<tr class=\"ltpurplebkgnd\">\n<td>22\/04\/03<\/td>\n<td>Start using GOES-12 SATOB winds (replaces GOES-8 in GOES-E position).<\/td>\n<\/tr>\n<tr>\n<td>08\/12\/03<\/td>\n<td>Switch from Met-5\/7 SATOB to BUFR winds using QI1 in the quality control and thinning.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Use of AMVs in the Meteo France model Physical characteristics Global Model Streched global model, spectral, semi-implicit semi-Lagrangien temporal scheme Horizontal resolution: T1798C2.2 (between T817 (25 km Gaussian grid) over the South Western Pacific and T3956 over Western Europe (5 km Gaussian grid)) Vertical resolution: 105 vertical levels, pressure hybrid coordinate, between 10 meters near the surface and 0.05 hPa (70 km) to the top of the model Data assimilation method Global Model Analysis\u00a0 4D-VAR, 6 hr time window, T224\/T499 (40 km Gaussian grid) C1L105, full B-matrix flow dependent Time window: T\u00b1 3hr, Analysis times (T):00,06,12,18 Z Time constraints (model [&hellip;]<\/p>\n","protected":false},"author":25,"featured_media":0,"parent":1312,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":""},"class_list":["post-45697","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/nwp-saf.eumetsat.int\/site\/wp-json\/wp\/v2\/pages\/45697","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nwp-saf.eumetsat.int\/site\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/nwp-saf.eumetsat.int\/site\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/nwp-saf.eumetsat.int\/site\/wp-json\/wp\/v2\/users\/25"}],"replies":[{"embeddable":true,"href":"https:\/\/nwp-saf.eumetsat.int\/site\/wp-json\/wp\/v2\/comments?post=45697"}],"version-history":[{"count":1,"href":"https:\/\/nwp-saf.eumetsat.int\/site\/wp-json\/wp\/v2\/pages\/45697\/revisions"}],"predecessor-version":[{"id":51904,"href":"https:\/\/nwp-saf.eumetsat.int\/site\/wp-json\/wp\/v2\/pages\/45697\/revisions\/51904"}],"up":[{"embeddable":true,"href":"https:\/\/nwp-saf.eumetsat.int\/site\/wp-json\/wp\/v2\/pages\/1312"}],"wp:attachment":[{"href":"https:\/\/nwp-saf.eumetsat.int\/site\/wp-json\/wp\/v2\/media?parent=45697"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}