Outlier Identification and Correction Online for the Ocean Geomagnetic Parameter Measurement
The outlier identification and correction of the geomagnetic parameter measurement is an important influencing factor for the probability and precision of the matching algorithms. The ream-time measurements of the geomagnetic field parameter can be considered as the first-order non-stationary random process, the real-time measurement value can be predicted by using the multi-level recursive method, the outlier identification can be done by the Dixon criterion, and the correction can be made by using the median filter and the one step prediction value. The inspection is carried out by using the emulation data and actual data, the results show that not only the isolated type but also the spot-type outlier value can be detected well and the signal reconstruction error is less than 5%.
Z. Y. Xu et al., "Outlier Identification and Correction Online for the Ocean Geomagnetic Parameter Measurement", Applied Mechanics and Materials, Vols. 90-93, pp. 2822-2827, 2011