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>From: Owen Cooper <address@hidden> >Organization: Aeronomy Laboratory/NOAA >Keywords: 200306251740.h5PHeMLd017765 McIDAS-X GRDCOPY Hi Owen, >Hhhmmm, I'm wondering if there is a problem with the actual AVN grids. I don't know, but I suspect that it isn't. >The script that I am invoking to derive ABV has always worked fine in >the past, as I use this script duiring field missions to calculate >potential vorticity. I have a script running since yesterday and today >it was able to calculate ABV using the 6 hour forecast from the 6:00 UTC >AVN. What ADDE server are you accessing for the RTGRIDS data? This could be important (i.e., what is the result of a 'DATALOC LOST RTGRIDS'). >If you go to >http://www.al.noaa.gov/WWWHD/ALData/satellite/COMBINE_G12_MET_WV_AVN.html >an image loop will load. The loop is 25 images long and most of them are >just dummy images until I can get 6 days of near real-time images >created and loaded into the loop. But if you go the the end of the loop >you will see 4 images of WV form GOES-East and Metosat at 00, 06 and 12 >UTC on June 26. OK. I did that. >Notice that the first 2 images don't have PV at 300 hPa because the job >failed. Yes, I see that. >But the 12 UTC image does have PV (calculated from the 6-hr >forecast of the the 6:00 UTC AVN run). If you watch theis image loop as >it updates over he next few days, every 6 hours, you may detect a >pattern as to when the script fails. Hopefully, I can find the problem before several days have past. >I hope this helps, I just searched the MUG inquiry list and don't find an entry for a GRDCOPY problem like the one you are seeing. I then got the approprite permissions to access the RTGRIDS dataset on a machine at SSEC, and the DERIVE=ABV worked fine. So, there is either a big/little endian bug floating around (their box is a Solaris x86 one), or something else is different between my and the SSEC GRD* servers. I am investigating... Tom