| 摘要 |
PROBLEM TO BE SOLVED: To provide a noise filter that does not cause time delay when noise to a geomagnetic vector H and its variationΔH used in calculation by a magnetic gyro and a dynamic three-dimensional azimuth meter is reduced.SOLUTION: The present invention provides a noise filter program as a weighted average processing program. The noise filter program performs weighted average in which the weighted coefficient is defined using a function f defined with parameters of an absolute valueΔ(here,Δ=|Hi-Hi-1|) of the variation of a vector, a thresholdαfor equally dividing the weight of both data, a thresholdβfor determining a range of simple average, and an average frequency N. |
