NOTE: The nws-changes mailing list is no longer active. The list archives are made available for historical reasons.
The message included below was sent earlier on our communications lines. It is also posted to the NWS Data Management Change Notices web page at the following URL. http://www.nws.noaa.gov/datamgmt/notices.shtml 2003/04/01 1815 UTC DM 03-03.30 GOES-12 TO BE ACTIVATED AS GOES EAST NOXX10 KWBC 271615 DATA MGT MESSAGE 03-03.03 TO AWIPS/NOAAPORT USERS... FAMILY OF SERVICES /FOS/ SUBSCRIBERS... EMERGENCY MANAGERS WEATHER INFORMATION NETWORK /EMWIN/ NATIONAL WEATHER SERVICE /NWS/ CUSTOMERS... WAFS USERS... GTS USERS... NWS FAX CHART USERS FROM RTH WASHINGTON DATA MANAGEMENT ON TUESDAY, APRIL 1, 2003, AT APPROXIMATELY 1815 UTC, GOES-12 (FORMERLY REFERRED TO AS GOES-M) REPLACES GOES-8 AS THE OPERATIONAL GOES EAST SATELLITE. BEGINNING AT THAT DATE/TIME, GOES EAST IMAGERY, SOUNDINGS, AND HIGH DENSITY WINDS ON NOAAPORT/SBN WILL BE BASED ON GOES-12. GOES-8, WHICH HAS BEEN PROVIDING OPERATIONAL PRODUCTS SINCE 1994, WILL BE REMOVED FROM ITS GOES EAST STATION AND RETIRED. ONCE ACTIVATED AS GOES EAST, GOES-12 WILL OPERATE ACCORDING TO THE GOES EAST SCHEDULES AND SCANNING STRATEGIES. THAT IS, GOES-12 WILL OPERATE AS GOES-8 PRESENTLY DOES. WHEN GOES-12 BECOMES OPERATIONAL, THE SUITE OF NOAAPORT/SBN GOES IMAGERY WILL CHANGE DUE TO TWO FACTORS: DIFFERENCES BETWEEN THE GOES-8 AND GOES-12 IMAGER INSTRUMENTS, AND THE DISCONTINUATION OF CERTAIN TWO-SATELLITE COMPOSITE SECTORS. THESE FACTORS ARE DESCRIBED BELOW. THE MAIN DIFFERENCES BETWEEN THE GOES-8 AND GOES-12 IMAGER INSTRUMENTS ARE AS FOLLOWS: 1. THE RESOLUTION OF THE GOES-12 WATER VAPOR CHANNEL (I.E., CHANNEL 3) IS 4 KM, AS OPPOSED TO 8 KM ON THE PRE-GOES-12 SATELLITES. 2. THE CENTRAL WAVELENGTH OF THE GOES-12 WATER VAPOR CHANNEL IS 6.5 µM AS OPPOSED TO 6.7 µM ON EARLIER SATELLITES. THE SPECTRAL RESPONSE OF THE GOES-12 WATER VAPOR CHANNEL IS ALSO WIDER THAN THOSE OF GOES 8-11. 3. CHANNEL 5 (THE 4 KM RESOLUTION 12µM CHANNEL ON PRE-GOES-12 SATELLITES) IS REPLACED ON GOES-12 BY CHANNEL 6 (A NEW 8 KM RESOLUTION CHANNEL CENTERED AT 13.3µM). THE IMAGER DIFFERENCES ARE DESCRIBED IN MORE DETAIL ON THE FOLLOWING WEB SITE: http://www.oso.noaa.gov/goes/goes-calibration/change-channels.htm THE NEW IMAGER ON GOES-12 WILL BE MOST EVIDENT IN PRODUCTS PROVIDED ON THE GOES EAST NOAAPORT/SBN CHANNEL. TWO-GOES-SATELLITE COMPOSITE IMAGERY ON THE GOES WEST NOAAPORT/SBN CHANNEL WILL ALSO BE AFFECTED SINCE THAT IMAGERY IS BASED, IN PART, ON THE GOES EAST IMAGER. FURTHERMORE, DURING PERIODS OF GOES WEST ECLIPSE, GOES EAST SENSOR DATA IS USED TO PRODUCE THE GOES WEST SECTORS THAT ARE DISSEMINATED VIA THE GOES WEST CHANNEL. CONSEQUENTLY, DURING THESE ECLIPSE PERIODS, GOES-12 IMAGERY WILL BE PROVIDED ON THE GOES WEST NOAAPORT CHANNEL, CORRESPONDING TO THE IMAGER INSTRUMENT CHANNELS AVAILABLE ON GOES WEST. AROUND THE TIME OF GOES-12 ACTIVATION, FOUR GOES EAST/WEST COMPOSITE PRODUCTS WILL BE DISCONTINUED ON BOTH THE GOES EAST AND GOES WEST CHANNELS OF NOAAPORT/SBN. THE DISCONTINUED PRODUCTS ARE THE SUPERNATIONAL AND NORTHERN HEMISPHERE COMPOSITES OF 3.9 µM AND 12 µM IMAGERY. THE WMO HEADERS CORRESPONDING TO THESE PRODUCTS ARE: 1. TIGN03 KNES - SUPERNATIONAL 12 µM SECTORS 2. TIGN04 KNES - SUPERNATIONAL 3.9 µM SECTORS 3. TIGF03 KNES - NORTHERN HEMISPHERE COMPOSITE 12 µM SECTORS 4. TIGF04 KNES - NORTHERN HEMISPHERE COMPOSITE 3.9 µM SECTORS GOES-12 IS IN THE PROCESS OF BEING REPOSITIONED TO THE GOES EAST STATION (NOMINAL LONGITUDE 75W). AT THE TIME OF GOES-12 ACTIVATION (ON APRIL 1) NOAA/NESDIS ESTIMATES THAT GOES-12 WILL BE NEAR 81W LONGITUDE. BECAUSE THIS POSITION IS APPROXIMATELY 6 DEGREES OF LONGITUDE WEST OF THE GOES EAST STATION, SOME GOES-12 IMAGERY PROVIDED VIA NOAAPORT/SBN MIGHT INITIALLY LACK COMPLETE SENSOR COVERAGE IN THE FAR EASTERN PORTIONS OF THE SECTORS. COVERAGE IS EXPECTED TO IMPROVE AS GOES-12 APPROACHES ITS GOES EAST STATION, AND ALL SECTORS ARE EXPECTED TO HAVE COMPLETE SENSOR DATA COVERAGE BY THE TIME GOES-12 REACHES THE GOES EAST STATION (ON ABOUT APRIL 24, 2003). ALTHOUGH THE GOES-8 AND GOES-12 SPACECRAFTS ARE BEING REPOSITIONED AS A PART OF THIS TRANSITION, THE NOAAPORT COMMUNICATIONS SATELLITE (SES AMC-4) REMAINS ON STATION. CONSEQUENTLY, NOAAPORT RECEIVE ANTENNAS WILL REQUIRE NO REPOINTING AS A RESULT OF THE GOES-12 ACTIVATION. A DESCRIPTION OF THE GOES EAST IMAGERY SECTORS AND DATA FORMATS APPEARS IN THE ?ICD FOR AWIPS-NESDIS,? AVAILABLE FROM THE FOLLOWING SITE: http://205.156.54.206/noaaport/html/refs.shtml THIS ICD WAS UPDATED ON JUNE 12, 2002 TO INCLUDE INFORMATION ON THE GOES-12 SECTORS. IF YOU HAVE ANY QUESTIONS, CONTACT BRIAN GOCKLE AT BRIAN.GOCKLE@xxxxxxxx. THIS INFORMATION IS ALSO POSTED ON THE NWS DATA MANAGEMENT CHANGE NOTICES WEB PAGE. THE URL IS LISTED BELOW. http://www.nws.noaa.gov/datamgmt/index.html DATA MANAGEMENT TELECOMMUNICATION OPERATIONS CENTER RTH WASHINGTON SENDS
nws-changes archives: