【摘要】：垂線偏差數(shù)據(jù)對于提高慣性導航精度具有重要意義,闡述了使用重力場球諧模型計算水平重力擾動的方法,使用EGM2008重力場球諧模型計算水平重力擾動,并將其與美國國家地理空間情報局提供的全球2.5′×2.5′垂線偏差網(wǎng)格數(shù)據(jù)進行對比,驗證了所述水平重力擾動計算方法的正確性。將水平重力擾動計算結(jié)果用于航空、車載慣性導航數(shù)據(jù)離線處理,結(jié)果表明EGM2008模型計算的水平重力擾動可用于補償慣性導航;將水平重力擾動計算結(jié)果用于長航時船載慣性導航數(shù)據(jù)離線處理,結(jié)果表明慣性導航精度最大提升1.5 n mile,平均提升0.8 n mile。
[Abstract]:The perpendicular deviation data is of great significance for improving the accuracy of inertial navigation. This paper expounds the method of calculating horizontal gravity disturbance by using the spherical harmonic model of gravity field and the horizontal gravity disturbance by using the spherical harmonic model of EGM2008 gravity field. Compared with the global 2.5'脳 2.5 'vertical deviation grid data provided by the National Geospatial Intelligence Agency of the United States, the proposed method is proved to be correct. The calculation results of horizontal gravity disturbance are used in aeronautical and vehicle-borne inertial navigation data off-line processing. The results show that the horizontal gravity disturbance calculated by EGM2008 model can be used to compensate inertial navigation. The calculation results of horizontal gravity disturbance are applied to the off-line processing of ship inertial navigation data during long voyage. The results show that the maximum accuracy of inertial navigation is 1. 5 n mile, and the average lift is 0. 8 n mile..
【作者單位】： 國防科技大學機電工程與自動化學院;
【基金】：國家自然科學基金項目(61603401) 國土資源部航空地球物理與遙感地質(zhì)重點實驗室青年創(chuàng)新基金課題(2016YFL06)
【分類號】：TN96

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