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>From: Tiziana Cherubini <address@hidden> >Organization: University of Hawaii >Keywords: 200401220117.i0M1Hfp2025292 GOES 10-bit data access Hi Tiziana, >we are currently receiving the three channels GOES10 >satellite data through ldm (8 bit resolution). The following is for our tracking system if nothing else: There are now all 5 imagery channels in the IDD. The short IR (3.9 um) and long IR (13.3 um for GOES-East and 12.0 um for GOES-West) channels was added at the beginning of January. The IDD "broadcast" frequency for all imager channels was also increased from hourly to half-hourly. The data still, however, contain 1-byte values and the oversampling in the horizontal dimension has been removed. >For our assimilation pourposes we'd like to have access to the >GOES10, 10 bit resolution data (all five channels). OK. >Last week I meet Tom Yoksas in Seattle at the AMS and he told >me that those data are disseminated through IDD. Not quite. I commented that the full resolution data is available through remote access by McIDAS and the Unidata IDV using its ADDE. I suggested that you contact me to follow-up on where you could get this data in a timely manner for your assimilation use. > I'd would appreciate if you could explain us what is >the procedure to have access to the 10 bit resolution data. I know of two locations where one can get the full resolution GOES data by remote McIDAS ADDE access: - a Unidata machine hosted in the Data Center at the SSEC at the University of Wisconsin-Madison - the SATEPS office of NOAA outside of Washington, D.C. There may be more sites that have the data, but these are the best I can do at the moment. Access to the imagery at both locations above depend on ADDE access to dataservers at those locations. Any ADDE-enabled application will give you access to that data. Two of the applications distributed and supported by the UPC are: McIDAS and the Unidata IDV. If you are familiar with McIDAS concepts of ADDE access to data, the following will make sense to you: ADDE server - unidata2.ssec.wisc.edu ADDE Group - WEST In a McIDAS-X session, you would "point" at the server for the dataset and then be able to view, copy, etc. the data remotely: DATALOC ADD WEST unidata2.ssec.wisc.edu DSINFO IMAGE WEST Dataset Names of Type: IMAGE in Group: WEST Name NumPos Content ------------ ------ -------------------------------------- ALL 2500 GOES-10 all imager data CONUS 2500 GOES-10 continental U.S. FD 2500 GOES-10 full disk NH 2500 GOES-10 northern hemisphere OTHER 2500 GOES-10 misc. (E.g. SRSO 1-minute imagery) SH 2500 GOES-10 southern hemisphere TEST 2500 GOES-10 all imager data DSINFO -- done IMGLIST WEST/CONUS.-10 Image file directory listing for:WEST/CONUS Pos Satellite/ Date Time Center Band(s) sensor Lat Lon --- ------------- ------------ -------- ---- ---- ------------ 5235 G-10 IMG 23 JAN 04023 20:45:00 33 132 1-5 5234 G-10 IMG 23 JAN 04023 20:30:00 26 140 1-5 5233 G-10 IMG 23 JAN 04023 20:15:00 33 132 1-5 5232 G-10 IMG 23 JAN 04023 20:00:00 26 140 1-5 5231 G-10 IMG 23 JAN 04023 19:45:00 33 132 1-5 5230 G-10 IMG 23 JAN 04023 19:30:00 26 140 1-5 5229 G-10 IMG 23 JAN 04023 19:15:00 33 132 1-5 5228 G-10 IMG 23 JAN 04023 19:00:00 26 140 1-5 5227 G-10 IMG 23 JAN 04023 18:45:00 33 132 1-5 5226 G-10 IMG 23 JAN 04023 18:30:00 26 140 1-5 5225 G-10 IMG 23 JAN 04023 18:00:00 0 140 1-5 IMGLIST: done IMGDISP WEST/CONUS BAND=1 REFRESH='EG;MAP SAT' MAG=-7 -14 Beginning Image Data transfer, bytes= 461408 IMGDISP: loaded frame 2 EG;MAP SAT IMGDISP: done Erased graphic frame(s) 2-2 MAP: Completed frame 2 And so on. What you would be looking to do is run a shell script that runs the necessar McIDAS commands at the appropriate time to copy the full resolution wavelength channel that you want into a local file. Here is a simple exaple of setting this up from the 'mcidas' account: DATALOC ADD WEST unidata2.ssec.wisc.edu DSSERVE ADD MYDATA/IMAGES AREA 1 9999 "All images in McIDAS AREA format IMGCOPY WEST/CONUS MYDATA/IMAGES.2000 BAND=1 LATLON=19 155:30 SIZE=1000 1000 This copies the VIS channel (BAND=1) to a local file (MYDATA/IMAGES.2000 will be the file AREA2000 by virtue of how the dataset was defined by the DSSERVE command) that is 1000 lines "tall" and 1000 elements "wide". The image file created will have the full 10-bit resolution and the oversampling in the horizontal dimension. Now, it would be up to you to determine what coverage you want, and where you want the resultant image centered. I can work with you on this. If you continue to work in the same account, you will not have to continue to set the pointing at the source dataset (the DATALOC command), now will you have to continually redefine the local dataset (DSSERVE command). So, if you continue to work in the 'mcidas' account as I mentioned at the beginning of this note, you could easily roll the one McIDAS command into a cron-initiated shell script. To make this easy for folks, I include two example scripts in my McIDAS distributoin. These will be found in the ~mcidas/data directory after the installation: mcrun.sh mcbatch.sh 'mcrun.sh' will run a series of McIDAS commands for you after setting the needed McIDAS environment variables. 'mcbatch.sh' runs a McIDAS BATCH file after setting the needed McIDAS variables. To use the scripts, your job is to: 1) make a copy of the script naming it something else (so your work won't get overwritten by a new McIDAS installation) 2) edit your copy of the script and set the McIDAS environment variables to match your McIDAS installation (this can be as simple as doing nothing if you follow the Unidata McIDAS installation instructions) 3) kicking the script off by cron at the appropriate time(s) during the hour for the imager band(s) you want Again, I can work with you on getting this working. Since I belive that the University of Hawaii has a relationship with NOAA, I recommend that you also pursue getting access to the McIDAS ADDE server that they maintain within the SATEPS group. As a first step, I would contact Brian Hughes <address@hidden> and explain that I told you about the ADDE servers that SATEPS maintains; that the UH has a relationship with NOAA; and that you had been led to believe that you could get ADDE access to the datasets that they maintain for your research/educational activities. If Brian is still the appropriate contact, he will then forward you a form that must be filled out before you can get the access. If Brian is no longer the appropriate contact, he will either forward your request to another person, or send you an email about who to contact. One more dataset that you will most likely be interested in. NASA has an ADDE server site that has global MODIS data. They recently opened up this site to whoever wants the data. Since you are looking for high resolution imagery, it strikes me that the MODIS data would be a logical dataset to investigate. >Your help is greatly appreciated. No worries. >Aloha, It was nice to meet you in Seattle! Cheers, >Tiziana. >--------------------------------------------------------------- > Tiziana Cherubini, Ph.D. Department of Meteorology > Research Meteorologist University of Hawaii > Mauna Kea Weather Center 2525 Correa Rd. HIG 367 > http://mkwc.ifa.hawaii.edu Honolulu, Hawaii 96822 > > tel.: (808) 956-4593 fax : (808) 956-2877 >--------------------------------------------------------------- Tom Yoksas -- NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publically available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us. >From address@hidden Fri Jan 30 17:10:33 2004 Hi Tom, thanks a lot for your detailed email. I'll start working on this very soon. I'll contact you again if I run (and it always happen, I'm afraid) into some problems. Thanks a lot again. It was nice for me too meeting you in Seattle. Aloha, Tiziana. --------------------------------------------------------------- Tiziana Cherubini, Ph.D. Department of Meteorology Research Meteorologist University of Hawaii Mauna Kea Weather Center 2525 Correa Rd. HIG 367 http://mkwc.ifa.hawaii.edu Honolulu, Hawaii 96822 tel.: (808) 956-4593 fax : (808) 956-2877 ---------------------------------------------------------------