| Citation: | HU Kang, ZHOU Jianghua, ZHANG Xiaojunet al. A stratospheric wind field interpolation method based on geostrophic wind model[J]. Journal of Beijing University of Aeronautics and Astronautics, 2022, 48(4): 639-646. doi: 10.13700/j.bh.1001-5965.2020.0625(in Chinese)
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The data accuracy and density of the stratospheric horizontal wind field have direct influence on the trajectory prediction accuracy and flight control accuracy of the high-altitude balloon experiment. Focusing on stratospheric wind field, this paper puts forward an interpolation method based on geostrophic wind model. The method improves the wind field accuracy in low-latitude area and calculation speed of the geostrophic wind model by improving the formula of Coriolis frequency and using two-dimensional convolution. Meanwhile, the method reduces the influence of observation error on interpolation result by using iterative binary linear regression and an improved adaptive bias weight matrix for the observed field. The experimental results show that the proposed interpolation method can effectively improve the calculation speed of the interpolation of stratospheric wind field and the interpolation accuracy of stratospheric horizontal wind field.
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