User's Manual

Table Of Contents
InterSense Doc. No. 072-00105-0I07 Rev. 4.2
IS-900 User Guide Page 128 of 177
10.7. ConstellationConfiguration Tool
ConstellationTool is used to configure and manage the Constellationof SoniDiscs.
This is the most important part of tracker configuration, as it has a direct effect on quality
of tracking.
Terminology
IS-900 models contain an ultrasonic subsystem that includes SoniDiscs (Ultrasonic
Transponder Beacons) and Microphones (URMs). To generalize the interface protocol
and configuration tools for these tracker models, InterSense uses the term: PSE -
Position Sensing Element.
A PSE may be Mobile or Fixed. Mobile PSEs are assigned to the stations and their
movements are tracked by the system. Fixed PSEs form a Constellation that is used
as a reference for tracking. In the case of IS-900 tracking systems, microphones are
mobile PSEs and SoniDiscs are fixed PSEs.
General Guidelines
The position of a SoniDisc is defined as the coordinates of the center of the grill covering
the speaker. All values are entered in meters. The coordinates of the SoniDiscs are
entered in a user-defined, locally leveled coordinate frame. The coordinate system is
right-handed with X pointing forward, Y to the right and Z pointing down (see Section