VYRO is a GE trade name for a sensor to detect angular rates (sort of a solid-state gyro)

I'm not sure about SAHR - the only reference I know of is to the Self Aligning Head Restraint used in some autos; I don't know if this makes sense in your case.

Hope this is of some help,
RIKMAN

After further searching, I found the following definations for Sahars and Vyro.  Does anyone have more info on Sahrs?

  Sahrs = Standard Attitude Heading Reference System

  Vyro

Dr. Stephen W. Tehon successfully applied piezo- electronic technology to vibrating angular rate sensors used on aircraft, line of sight camera stabilizers for camcorders, and rotating detectors for automotive anti-skid systems.
 
He is a pioneer in the development of vibrating angular rate
sensors, generally called piezo-gyros.  In 1970, he received a patent for a vibrating bar, angular rate sensor, while he was at the GE Electronics Lab, in Syracuse.  The immediate use was to the improved control of military aircraft.  The vibrating bar piezo-gyro eliminated the bearings and suspension required for the conventional wheel gyro.

GE subsequently manufactured the Tehon piezo-gyro (renamed the VYRO) in central New York.  They are now used in military aircraft such as the A-10 Wart-Hog and the V- 22 tilt-rotor aircraft.
 
Consumer applications include stabilizing video camcorders, rotation detectors for automobile anti-skid systems, and stabilizing antennas on moving vehicles.