Target manager

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• The software has a list of predefined prisms.

• It is possible to create custom prisms.

• While in survey or stakeout applications, click on the prism icon to open the Select target page.

  

• Click Target manager.

  

• The target manager page allows to check the list of predefined targets and create customized targets.

• Targets with icon are predefined and cannot be deleted.

• Select a target to check its offsets.

  

  • Target name: the name of the target.

  • Reflector type: the type of reflector.

  • Constant (mm): constant of the prism.

  • Constant absolute (mm): absolute constant of the prism.

  • Prism offsets: the traversal, on top and longitudinal offset. These offsets are used when measuring with prism offset.

    

• Click Add to create a custom target.

  

  • Target name: the name of the customized target.

  • Reflector type: the type of reflector; the options in this page changes depending on the selected reflector type.

  • Constant (mm): constant of the prism.

  • Constant absolute (mm): absolute constant of the prism.

  • Target height offset (mm):specify an additional height offset for each target to ensure that the final height of the prism is correct. To use the GNSS pole and adapt it to be used with the prism. With an adapter, the same pole can be used for GNSS and TPS measurements.

  • Prism offsets: the traversal, on top and longitudinal offset. These offsets are used when measuring with prism offset.

    

  • Target icon: changes the icon for the target.

• The prism constant is an important characteristic of the reflector.

•  This constant, always given in [mm], is specific to the model and physically represents the constant difference between the measured value and the "exact" value.

• This difference will be cancelled during the measurements by entering an "additive constant" in the total station.

• There are two types of constants:

  • Prism constant: for GeoMax/Leica prisms (usually in positive values).

  • Absolute constant: for prisms of other manufacturers (usually in negative values).

•  The additive constants, of non GeoMax/Leica prisms, are often given in the true zero prism system. Whereas the GeoMax/Leica prisms are given in the Hexagon TPS prism system.

• In order to switch from a system to another, we can use the following formula, that links these two constants:

  • GeoMax/Leica prism constant = Absolute prism constante + 34.4mm

  • Absolute prism constant = GeoMax/Leica prism constant – 34.4mm