發(fā)布時(shí)間：2018-02-17 00:02

  本文關(guān)鍵詞： 地球重力場(chǎng) GRCAE 大氣去混頻模型 球諧分析 星間距離變率殘差　出處：《大地測(cè)量與地球動(dòng)力學(xué)》2017年04期 　論文類型：期刊論文

【摘要】：基于球諧分析的解析積分公式,導(dǎo)出5種適合于大氣去混頻模型計(jì)算的球諧分析公式。采用無(wú)誤差和加入誤差的模擬大氣壓數(shù)據(jù),通過(guò)"閉環(huán)"過(guò)程分析了5種球諧分析方法的正確性和有效性。基于ERA-Interim表面大氣壓數(shù)據(jù),采用5種球諧分析方法計(jì)算了5組大氣去混頻模型。通過(guò)星間距離變率殘差和累計(jì)大地水準(zhǔn)面誤差比較可知,不同球諧分析方法可導(dǎo)致星間距離變率殘差的差距最大達(dá)0.6nm/s。第一類Neumann方法精度最高,證明5種球諧分析方法對(duì)現(xiàn)有GRACE衛(wèi)星重力恢復(fù)的影響可忽略;但對(duì)于未來(lái)采用激光測(cè)距的衛(wèi)星重力任務(wù),建議大氣去混頻模型計(jì)算采用第一類Neumann方法。
[Abstract]:Based on the analytical integral formula of spherical harmonic analysis, five kinds of spherical harmonic analysis formulas suitable for the calculation of atmospheric de-mixing model are derived. The simulated atmospheric pressure data with no errors and adding errors are used. The correctness and validity of five spherical harmonic analysis methods are analyzed by "closed loop" process. Based on ERA-Interim surface atmospheric pressure data, Five sets of atmospheric demixing models were calculated by using five spherical harmonic analysis methods. Different spherical harmonic analysis methods can result in the largest difference of the residual error of the distance between satellites up to 0.6 nm / s. The accuracy of the first Neumann method is the highest. It is proved that the influence of the five spherical harmonic analysis methods on the gravity recovery of the existing GRACE satellites can be neglected. However, for future satellite gravity missions using laser ranging, it is suggested that the first Neumann method should be used in the calculation of atmospheric de-mixing model.
【作者單位】： 西南交通大學(xué)地球科學(xué)與環(huán)境工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(41574018,41404018) 中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)(2682015CX010) 高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)基金(20120184120006)~~
【分類號(hào)】：P223

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