{"id":1021,"date":"2015-08-19T08:54:05","date_gmt":"2015-08-19T08:54:05","guid":{"rendered":"http:\/\/www.nwpsaf.eu\/site\/software\/aapp\/aapp-overview\/amsu-a\/"},"modified":"2015-08-19T09:14:45","modified_gmt":"2015-08-19T09:14:45","slug":"amsu-a","status":"publish","type":"page","link":"https:\/\/nwp-saf.eumetsat.int\/site\/software\/aapp\/aapp-overview\/amsu-a\/","title":{"rendered":"AMSU-A"},"content":{"rendered":"

Advanced Microwave Sounding Unit-A (AMSU-A)<\/h2>\n

The Advanced Microwave Sounding Unit-A (AMSU-A) and the Advanced Microwave Wave Sounding Unit B are planned for NOAA K, L and M. AMSU-A, a US instrument, and an upgrade of AMSU-B, the Microwave Humidity Sounder (MHS), procured and developed by EUMETSAT, are planned to fly on METOP. The prime role of these Microwave Sounders is to provide temperature and humidity sounding under completely overcast conditions and to aid the cloud detection for the companion IR sounding instrument. The temperature sounding exploits mainly the band of oxygen at 50 GHz.<\/p>\n

The 3 dB instantaneous footprint for AMSU-A channels is 3.3\u00b0 (45 km). Calibration repeatability is 0.3 K. AMSU-A scans across track in a \u2018stop and stare\u2019 mode at a scan rate of 8 sec. The circular instantaneous field of view has a diameter of 45 km at nadir. The covered swath is about \u00b1 1027 km. There are 30 mirror positions per scan.<\/p>\n

AMSU-A channel characteristics (spec)<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Channel<\/td>\nCentral Frequency (GHz)<\/td>\n# of Pass Bands<\/td>\nBandwidth\u00a0 (MHz)<\/td>\nNeDT (K)<\/td>\nCalib Acc. (K)<\/td>\npol. ang. (\u00b0 )<\/td>\n<\/tr>\n
AMSU-A2<\/b><\/center><\/td>\n<\/tr>\n
1<\/td>\n23.8<\/td>\n
1<\/center><\/td>\n
\u00b1 135<\/td>\n0.3<\/td>\n2.0<\/td>\n90-q<\/td>\n<\/tr>\n
2<\/td>\n31.4<\/td>\n
1<\/center><\/td>\n
\u00b1 90<\/td>\n0.3<\/td>\n2.0<\/td>\n90-q<\/td>\n<\/tr>\n
AMSU-A1<\/b><\/center><\/td>\n<\/tr>\n
3<\/td>\n50.3<\/td>\n
1<\/center><\/td>\n
\u00b1 90<\/td>\n0.4<\/td>\n1.5<\/td>\n90-q<\/td>\n<\/tr>\n
4<\/td>\n52.8<\/td>\n
1<\/center><\/td>\n
\u00b1 200<\/td>\n0.25<\/td>\n1.5<\/td>\n90-q<\/td>\n<\/tr>\n
5<\/td>\n53.596 \u00b1 0.115<\/td>\n
2<\/center><\/td>\n
\u00b1 85<\/td>\n0.25<\/td>\n1.5<\/td>\nnospec<\/td>\n<\/tr>\n
6<\/td>\n54.40<\/td>\n
1<\/center><\/td>\n
\u00b1 200<\/td>\n0.25<\/td>\n1.5<\/td>\nnospec<\/td>\n<\/tr>\n
7<\/td>\n54.94<\/td>\n
1<\/center><\/td>\n
\u00b1 200<\/td>\n0.25<\/td>\n1.5<\/td>\nnospec<\/td>\n<\/tr>\n
8<\/td>\n55.50<\/td>\n
1<\/center><\/td>\n
\u00b1 165<\/td>\n0.25<\/td>\n1.5<\/td>\nnospec<\/td>\n<\/tr>\n
9<\/td>\nFLO<\/sub> = 57.290344<\/td>\n
1<\/center><\/td>\n
\u00b1 165<\/td>\n0.25<\/td>\n1.5<\/td>\nnospec<\/td>\n<\/tr>\n
10<\/td>\nFLO<\/sub> \u00b1 0.217<\/td>\n
2<\/center><\/td>\n
\u00b1 39<\/td>\n0.4<\/td>\n1.5<\/td>\nnospec<\/td>\n<\/tr>\n
11<\/td>\nFLO<\/sub> \u00b1 0.3222\u00b1 0.048<\/td>\n
4<\/center><\/td>\n
\u00b1 18<\/td>\n0.4<\/td>\n1.5<\/td>\nnospec<\/td>\n<\/tr>\n
12<\/td>\nFLO<\/sub> \u00b1 0.3222\u00b1 0.022<\/td>\n
4<\/center><\/td>\n
\u00b1 8<\/td>\n0.6<\/td>\n1.5<\/td>\nnospec<\/td>\n<\/tr>\n
13<\/td>\nFLO<\/sub> \u00b1 0.3222\u00b1 0.010<\/td>\n
4<\/center><\/td>\n
\u00b1 4<\/td>\n0.8<\/td>\n1.5<\/td>\nnospec<\/td>\n<\/tr>\n
14<\/td>\nFLO<\/sub> \u00b1 0.3222\u00b1 0.0045<\/td>\n
4<\/center><\/td>\n
\u00b1 1.5<\/td>\n1.2<\/td>\n1.5<\/td>\nnospec<\/td>\n<\/tr>\n
15<\/td>\n89.0<\/td>\n
1<\/center><\/td>\n
\u00b1 3000<\/td>\n0.5<\/td>\n2.0<\/td>\n90-q<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Advanced Microwave Sounding Unit-A (AMSU-A) The Advanced Microwave Sounding Unit-A (AMSU-A) and the Advanced Microwave Wave Sounding Unit B are planned for NOAA K, L and M. AMSU-A, a US instrument, and an upgrade of AMSU-B, the Microwave Humidity Sounder (MHS), procured and developed by EUMETSAT, are planned to fly on METOP. The prime role of these Microwave Sounders is to provide temperature and humidity sounding under completely overcast conditions and to aid the cloud detection for the companion IR sounding instrument. The temperature sounding exploits mainly the band of oxygen at 50 GHz. The 3 dB instantaneous footprint for […]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":997,"menu_order":78,"comment_status":"open","ping_status":"open","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-1021","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/nwp-saf.eumetsat.int\/site\/wp-json\/wp\/v2\/pages\/1021","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\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/nwp-saf.eumetsat.int\/site\/wp-json\/wp\/v2\/comments?post=1021"}],"version-history":[{"count":0,"href":"https:\/\/nwp-saf.eumetsat.int\/site\/wp-json\/wp\/v2\/pages\/1021\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/nwp-saf.eumetsat.int\/site\/wp-json\/wp\/v2\/pages\/997"}],"wp:attachment":[{"href":"https:\/\/nwp-saf.eumetsat.int\/site\/wp-json\/wp\/v2\/media?parent=1021"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}