【摘要】：基于Cryosat-2三年半的衛(wèi)星測高GDR(geophysical data records)數(shù)據(jù),使用海面高梯度,依據(jù)最小二乘配置方法得到了南海部分海域垂線偏差格網(wǎng),結(jié)合移去-恢復(fù)技術(shù)采用逆Vening-Meinesz的球面一維傅里葉變換算法快速計算我國近海海域測高重力異常CASM_GRA.與船載重力測量數(shù)據(jù)融合后,重力場精度在2.75~5.38mgal之間,平均偏差在-0.21~0.45mgal之間.與DTU13重力場模型相比,平均值最大改進(jìn)為12.98mgal,標(biāo)準(zhǔn)差最大降幅近3.40mgal.與Sandwell V23.1模型相比,平均值最大改進(jìn)為13.58 mgal,標(biāo)準(zhǔn)差最大降幅為1.09mgal.
[Abstract]:Based on the satellite altimetry GDR (geophysical data records) data of three and a half years from Cryosat-2, using the sea surface height gradient and the least square collocation method, the vertical deviation grid of some parts of the South China Sea is obtained. Fast calculation of gravity anomaly CASM_GRA. in offshore waters of China by using inverse Vening-Meinesz one-dimensional Fourier transform algorithm combined with removal and recovery technique After fusion with the data of shipborne gravity survey, the precision of gravity field is between 2.75~5.38mgal and the average deviation is between-0.21~0.45mgal. Compared with the DTU13 gravity field model, the maximum average value is 12.98 mgaland the maximum standard deviation is 3.40 mgal. Compared with the Sandwell V23.1 model, the maximum improvement of the average value is 13.58 mgal, standard deviation and the maximum decrease is 1.09mgal.
【作者單位】： 中國測繪科學(xué)研究院;海軍大連艦艇學(xué)院海洋測繪系;
【基金】：國家重點(diǎn)研發(fā)計劃(2016YFB0501702) 國家“九七三”重點(diǎn)基礎(chǔ)研究發(fā)展計劃(2013CB733302) 科技基礎(chǔ)性工作專項(xiàng)(2015FY310200) 國家自然科學(xué)基金(41404034,41374081,41004004,41304009,41574004) 德意志學(xué)術(shù)交流中心(DAAD)現(xiàn)代大地測量空間技術(shù)全球變化監(jiān)測項(xiàng)目(57173947)
【分類號】：P223.39
，

本文編號：2281529