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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
Andrew Donaldson wrote: > > > is there a contact point at the Australian > > Bureau of Meteorology who can/will share technical details? > > James Kelly is probably the best contact, try j.kelly@xxxxxxxxxx > James usually monitors this list, but he's away at the moment. > You're also welcome to ask me. > > > for example, the radar display (main) expects a data file, > > however the file is not in the ViasAD examples directory. > > This file should be the right format: > ftp://ftp.bom.gov.au/sample/IDBRA000/IDR02POL.txt > Since I've done a little bit of work on this, I'll add my $.02. These are my opinions based on conversations with James Kelly. If I misrepresent anything, I apologize in advance. The visad.bom.RadarDisplay class is really just a test program to display radar data files that the BoM distributes from their radar sites. The format is specific to the BoM (i.e. they are not NIDS files). RadarDisplay uses the RadarAdapter class that uses the RadarFile class which actually reads the data file. The data files are ASCII, and use a special compression scheme developed by the BoM. If you use the file that Andrew specified above, you need to rename it to radar.dat to use with RadarDisplay. You would also need the OUTLAUST map file, which you can get at ftp://ftp.unidata.ucar.edu/pub/dmurray/OUTLAUST. RadarDisplay will display the data either as a 2D image of reflection values mapped to RGB, or as a 3D display of the values with the reflection values mapped to RGB and ZAxis. The original goal of the visad.bom.Radar* classes was to be able to read these data files to display them in the BoM's AIFS displays. However, that goal has been superceded by the use of an ADDE server to collect the data files so further work on the RadarDisplay program is not likely (as far as reading the ASCII files). Of particular importance in this package (as far as displaying radar data) are the Radar*DCoordinateSystem classes which will transform range, azimuth (and elevation) to lat, lon, (alt) (3D versions in parens). Unidata and other groups at NCAR will be using these to develop programs for displaying the U.S. Level II NEXRAD data. As Andrew says, James is the best contact for questions on this package, but I hope this helps.
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