Range Uncertainty Files (.re)

You can specify a range uncertainty file (.re) that contains range uncertainty information between a coverage asset and a grid instance, as a function of the elevation angle.

There are two ways to specify range uncertainty using an elevation dependent table:

  • Elevation angles in combination with range standard deviations. See the sample file.

    • The file format used for a standard deviation uncertainty file follows.

    stk.v.6.0
    BEGIN RangeUncertainty
     
        DistanceUnitAbrv <value>
     
        NumberOfPoints <value>
     
        Begin ElevationRangeStdDev
           <elevation angle in degrees> <range standard deviation in meters>
           .
           .
        END ElevationRangeStdDev
     
    END RangeUncertainty

  • Elevation angles with range variations. See the sample file.

    • The file format used for a range variation uncertainty file follows.

    stk.v.6.0
    BEGIN RangeUncertainty
     
        DistanceUnitAbrv <value>
     
        NumberOfPoints <value>
     
        Begin ElevationRangeVariation
           <elevation angle in degrees> <range variation in meters>
           .
           .
        END ElevationRangeVariation
     
    END RangeUncertainty

Keywords Description
STK version number The version of STK software for which the file is formatted to be used.
BEGIN RangeUncertainty
END RangeUncertainty keywords		 Set off the beginning and end of the RangeUncertainty keyword group.
DistanceUnitAbrv <value> Sets the distance unit to be used for all distance measurements in the elevation dependent table.

To see a list of all available units of measure, open the Units page of the Scenario's Basic properties by double-clicking the scenario in the Object Browser and selecting the Units page.
NumberOfPoints <value> The number of elevation-range pairs that follow.
BEGIN ElevationRangeStdDev
END ElevationRangeStdDev

Set off the beginning and end of the range standard deviation pairs. Each range standard deviation pair consists of <elevation angle in degrees> <range standard deviation in meters>.

You must specify either a standard deviation or a range variation.
BEGIN ElevationRangeVariation
End ElevationRangeVariation

Set off the beginning and end of the range variation pairs. Each range variation pair consists of <elevation angle in degrees> <range variation in meters>.

You must specify either a standard deviation or a range variation.