Table 2.

Attitude angle calibration parameters.

Group	Roll (°)			Pitch (°)			Heading (°)
	IMU	Station	△	IMU	Station	△	IMU	Station	△
1	4.261	4.445	−0.183	−0.141	−0.242	0.101	62.226	62.249	−0.023
2	4.257	4.477	−0.219	−0.140	−0.217	0.077	62.264	62.263	0.000
3	4.261	4.495	−0.234	−0.128	−0.179	0.051	62.265	62.221	0.045
4	4.264	4.476	−0.212	−0.119	−0.192	0.073	62.211	62.192	0.019
5	4.270	4.560	−0.289	−0.108	−0.179	0.071	62.154	62.123	0.031
Average			−0.228			0.075			0.015