Using CDR Data from a TRACON Facility

This procedure assumes you are able to obtain data CDR data from an TRACON facility into the computer. How this is done is beyond the scope of this procedure. Radar ViewPoint supports both the 'TG' Target report and 'TD' Track Data report formats. As a convention, the following extensions are used: raw CDR data files used .CDR, Universal Radar Formatted files use the .URF extension, and Radar ViewPoint database files use the .RAD extension. These extensions are not required, but they are assumed by various programs if not specified.


When first starting to use CDR data, you will need to edit the CDR2URF.INI file. For each TRACON facility you will get CDR data from, radar subsystem information must be added.. You will need to know the coordinates, sensor altitude, and magnetic variation for each radar subsystem managed by each TRACON facility. There is some samples within the CDR2URF.INI file, so please look at them when you edit the file. Follow these guidelines when adding a new facility:
  1. Start by adding the new facilities' three letter ident enclosed in brackets; e.g.; [LAX]
  2. Make up a unique number (between 0 and 999) for the facility and add a line like:
  3. For each radar subsystem, add a line with the following form:
    where 'x' is the subsystem's number.

    It is very critical that the coordinates and magVariation are accurate. The radar data is oriented in reference to magnetic north and it is vital that you use the value that the radar uses. The altitude is not very critical unless the /SLANTRANGE option is used, then this value should be within 100 feet of the actual altitude.

  4. If you will be using any particular facility more than others, you may want to specify it as the default facility. Under the [Defaults] section of the CDR2URF.INI file, change the 'Facility=...' line to 'Facility=xxx' where xxx is your facility of choice.

Conversion Overview:

Once the CDR data is loaded onto the system with Radar ViewPoint, there are two basic procedures to perform to prepare the files for use within Radar ViewPoint. These are: Within DOS or the DOS compatibility box...
  1. Convert the .CDR file to a .URF file (Universal Radar Format file) by using the CDR2URF program.
  2. Convert the URF file to a RAD file by using the MAKERADR program.

A complete conversion of a file named USA56.CDR to USA56.RAD would look like this:

That's it.
We just produced a USA56.RAD file with all the data within USA56.CDR.

Both CDR2URF and MAKERADAR have command line options available. Execute each of the programs with the /HELP option to get a summary of the additional features. Also, the record format layout of the Universal Radar Format files (.URF) can be obtained by typing:


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