Length to Sensors

The more distance between the sensors and the center of rotation, the more sensitive the sensors are to angular errors. This is nothing more than geometry. For example, if individual sensors are 6mm apart, and the length between the sensor banks and the center of rotation is 200mm, then the sensitivity of angular errors is $\arctan{\frac{90}{200}}-\arctan{\frac{96}{200}}$, which is $24.23-25.64=-1.41$ degrees. Assuming the same basic design but a shorter distance of 100mm between the sensor banks and the center of rotation, the sensitivity becomes $\arctan{\frac{90}{100}}-\arctan{\frac{96}{100}}$ which evaluates to $41.99-43.83=-1.84$ degrees.