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[IDV #EXW-537827]: Radar and other instruments data

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [IDV #EXW-537827]: Radar and other instruments data
  • Date: Fri, 04 Dec 2009 14:13:46 -0700
> Hi-
> 
> > Full Name: Nitin
> > Email Address: address@hidden
> > Organization: Pacific Northwest National Laboratory
> > Package Version:
> > Operating System:
> > Hardware:
> > Description of problem: Hi,
> > I want to use IDV on a test basis as a display software for cloud and 
> > precipitation radars. As of now I have many questions as I am not 
> > proficient in IDV. Is there any document describing IDV's usage for cloud 
> > and precipitation radars (PPI, RHI, time-height,ascope from PPI, RHI) so 
> > that I can look at NETCDF data format issues.
> 
> There are examples of the radar displays in the IDV User's Guide:
> 
> http://www.unidata.ucar.edu/software/IDV/docs/userguide/page_satelliteandradardisplays.html
> 
> and the IDV Training Workshop:
> 
> http://www.unidata.ucar.edu/software/IDV/docs/workshop/datadisplays/level2/index.html
> 
> What is the format of your netCDF radar data?  We are working on developing a 
> standard with others at UCAR.  If you are interested in being part of that 
> discussion, please let me know.
> 
> Don Murray
Nitin,
           Here  is a good example for you:
netcdf file:/machine/yuanho/Desktop/nssl/netcdf90.ncml {
 dimensions:
   Azimuth = 90;
   Gate = 1800;
   sweep = 2;
 variables:
   float BeamWidth(Azimuth=90);
     :Units = "Degrees";
   float AzimuthalSpacing(Azimuth=90);
     :Units = "Degrees";
   float GateWidth(Azimuth=90);
     :Units = "Meters";
   float NyquistVelocity(Azimuth=90);
     :Units = "MetersPerSecond";
   double sweep(sweep=2);
   float Reflectivity(sweep=2, Azimuth=90, Gate=1800);
     :Units = "dBZ";
     :NumValidRuns = -1; // int
   float Azimuth(sweep=2, Azimuth=90);
     :Units = "Degrees";

 :Elevation = 1.29638671875; // double
 :ElevationUnits = "Degrees";
 :RangeToFirstGate = 10092.962890625; // double
 :RangeToFirstGateUnits = "Meters";
 :MissingData = -99900.0f; // float
 :RangeFolded = -99901.0f; // float
 :TypeName = "Reflectivity";
 :DataType = "RadialSet";
 :Latitude = 35.23583221435547; // double
 :Longitude = -97.46194458007812; // double
 :Height = 13.0; // double
 :Time = 1145926820; // int
 :FractionalTime = 0.0020475560000000003; // double
 :attributes = " ColorMap Unit smoothingKernel";
 :ColorMap-unit = "dimensionless";
 :ColorMap-value = "Reflectivity";
 :Unit-unit = "dimensionless";
 :Unit-value = "dBZ";
 :smoothingKernel-unit = "dimensionless";
 :smoothingKernel-value = "none";
 :format = "nssl/netcdf";
 :volume = "true";
 :conventions = "_Coordinates";
 :ProductStationName = "TTTT";
 :time_coverage_start = "2006-04-25T21:06:21Z";
}



Ticket Details
===================
Ticket ID: EXW-537827
Department: Support IDV
Priority: Normal
Status: Open