>From: David Garrana Coelho <address@hidden> >Organization: UFRJ >Keywords: 200307221908.h6MJ8JLd020160 ldm-mcidas NIDS ARPS Hi David, re: >(http://www.caps.ou.edu/ARPS) model thru its data assimilation package >called ADAS (link on the ARPS page). It haves among his utilities, a tool >called 88d2arps, used to convert 88d format radar data into ADAS readable >format. And inside this tool, there is a small piece of code (which I >managed to compile successfully) called nids2arps, who in turn, claims to >be able to "Remaps NIDS Level-III data to ARPS grid". Sadly (and that's my >main concern in it all) it haves no documentation, no help or readme >file. My hopes are to find a NIDS file which I can test this piece of code >and try to find out how it works. After getting into the office and rereading the paragraph above, I relized that the information I gave you about the ldm-mcidas package was incomplete: ldm-mcidas-2003.tar.Z contains a set of NIDS data files that you could use in your tests. Here is the information again: ftp ftp.unidata.ucar.edu <user> anonymous <pass> address@hidden cd pub/ldm-mcidas binary get ldm-mcidas-2003.tar.Z quit zcat ldm-mcidas-2003.tar.Z | tar xvf - cd ldm-mcidas-2003/src/decode The files with the '.raw' suffic are uncompressed NIDS data files that I use to test the conversion routine 'nids2area' (converts NIDS format data into McIDAS AREA files): vil.raw - vertically integrated liquid water vel4.raw - radial velocity at tilt 4 vel3.raw - radial velocity at tilt 3 vel2.raw - radial velocity at tilt 2 vel1.raw - radial velocity at tilt 1 tops.raw - echo tops pret.raw - storm total precipitation pre3.raw - three-hour precipitation totals pre1.raw - one-hour precipitation totals lref3.raw - layer reflectivity - layer 3 lref2.raw - layer reflectivity - layer 3 lref1.raw - layer reflectivity - layer 3 cref.raw - composite reflectivity bref4.raw - base reflectivity at tilt 4 bref3.raw - base reflectivity at tilt 3 bref2.raw - base reflectivity at tilt 2 bref1.raw - base reflectivity at tilt 1 brlr1.raw - 248 nm base reflectivity srmv2.raw - storm relative radial velocity at tilt 2 srmv1.raw - storm relative radial velocity at tilt 2 So, the good news is that you will have a set of uncompressed NIDS files to test the ARPS code on, AND if you build the ldm-mcidas package, you will have code for a routine that converts the NIDS data to a different format, McIDAS AREA. This could be helpful in your reverse engineering of the ARPS assimilation process. re: >Its mixed C and FORTRAN code, and I know very little of C. The code for nids2area is a combination of Fortran and C. The code that reads in the NIDS file data is all in C. I can help you wade through this code if you like. re: sending me the ARPS code >If you think sending you this code can help somehow, lemme know. It may help. If it is a lot of code, please stick it out in a directory I can get to on brisa. If you are looking at one, two or three subroutines, then send them along. Cheers, Tom -- +-----------------------------------------------------------------------------+ * Tom Yoksas UCAR Unidata Program * * (303) 497-8642 (last resort) P.O. Box 3000 * * address@hidden Boulder, CO 80307 * * Unidata WWW Service http://www.unidata.ucar.edu/* +-----------------------------------------------------------------------------+
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