發(fā)布時間：2018-06-25 22:29

  本文選題：傳統(tǒng)層間改正 + 有限范圍層間改正　； 參考：《測繪學(xué)報》2017年01期

【摘要】：層間改正是重力歸算的一項重要內(nèi)容,傳統(tǒng)的平面層層間改正、球面層層間改正與地形改正的范圍不一致,因此均存在遠(yuǎn)區(qū)虛擬地形引入的近似誤差,且計算點高度越高,此誤差越大。本文提出使用有限范圍的層間改正進行重力歸算的方法,使其區(qū)域范圍與地形改正的范圍一致。然后給出了有限范圍層間改正的簡便計算方法,該算法與通過地形改正嚴(yán)密積分法演化來的算法具有較好的一致性。內(nèi)插試驗說明當(dāng)計算點地形高于1000m時,內(nèi)插應(yīng)使用基于有限范圍層間改正的重力歸算方法。
[Abstract]:Interlayer correction is an important part of gravity reduction. The traditional interlayer correction is inconsistent with the range of topographic correction. Therefore, there is an approximate error caused by the virtual terrain in the far region, and the height of the calculated point is higher. The greater the error. In this paper, a method of gravity reduction by using a finite range of interlayer corrections is proposed, which makes the regional range consistent with the range of topographic correction. Then, a simple calculation method of interlayer correction in finite range is presented, which is in good agreement with the algorithm evolved by the strict integration method of terrain correction. The interpolation test shows that when the terrain of the calculated point is higher than 1000m, the gravity reduction method based on the correction between the finite range layers should be used in the interpolation.
【作者單位】： 信息工程大學(xué)地理空間信息學(xué)院;地理信息工程國家重點實驗室;西安測繪研究所;信息工程大學(xué)導(dǎo)航與空天目標(biāo)工程學(xué)院;長安大學(xué)地質(zhì)工程與測繪學(xué)院;
【基金】：國家自然科學(xué)基金(41674025;41674082) 地理信息工程國家重點實驗室開放研究基金(SKLGIE2016-M-1-5)~~
【分類號】：P223
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本文編號：2067777