Gyroscopic compass

Lee KN (1993) Compass and gyroscope integrating science and politics for the environment. Island, Washington, DC,p 243... 

Sensor information collected by the T1 nodes can be transmitted automatically or on request to T2 nodes. For current motion capture applications, sensor data is transmitted as frequendy as possible. A typical packet is 17 bytes containing a node ID, accelerometer, gyroscope, and compass data. While the l C network can provide bus speeds up to 400 KHz, packet sizes and communication overhead limit effective transmission rates. Lewis estimated the impact of increasing the number of T1 nodes on effective transmission rates, and his results are shown in Fig. 27.15 [10]. 

Figure 27.17 Front and back of Tier 1 node show CPU, accelerometer, compass, and gyroscope.

Sensors 3-axis accelerometer, 2x 2-axis gyroscope, 3-axis compass... 

Gyrocompass Compass that points true north (rather than magnetic north) by using a fest-spin-ning gyroscope. Unlike a ms netic compass, a gyrocompass is unaffected by ms netic fields. 

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