USER MANUAL
URM18PH392 Rev A. May 2020 Page 67 of 86
APPENDIX A. TERMS & ACRONYMS
Alignment Obtaining congruence between the axes of the VIPER™ system and the axes of the
application. The process whereby the VIPER™ system coordinate reference is brought
into coincidence, either physically or mathematically, with other coordinates of the
environment.
Alignment Frame The reference frame in which the position and orientation of the Sensor is measured.
The default alignment frame is the Source frame.
API Application Programming Interface. Programming library used to develop custom host
software for driving the instrument. Sometimes used interchangeably with “SDK.”
ASCII American national Standard Code for Information Interchange defines a certain 8-bit
code for display and control characters.
Attitude See Orientation.
Attitude Matrix A three-by-three matrix containing the direction cosines of the sensor’s X axis in column
one, the direction cosines of the sensor’s Y axis in column two, and the direction cosines
of the sensor’s Z axis in column three. The order of the Euler angle rotation sequence is
azimuth, elevation, and roll.
CA*SE*SR - SA*CR
CA*CR + SA*SE*SR
CE*SR
CA*SE*CR + SA*SR
SA*SE*CR – CA*SR
CE*CR
Where:
CA = Cos (azimuth)
CE = Cos (elevation)
CR = Cos (roll)
SA = Sin (azimuth)
SE = Sin (elevation)
SR = Sin (roll)
Auto-Hemisphere Tracking With FT Sensor technology, VIPER™ is able to automatically detect and track the
operating Hemisphere of an FT Sensor.
To Next Page
Loading...