【摘要】：基于Cryosat-2三年半的衛(wèi)星測(cè)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(jì)算我國(guó)近海海域測(cè)高重力異常CASM_GRA.與船載重力測(cè)量數(shù)據(jù)融合后,重力場(chǎng)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(chǎng)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(guó)測(cè)繪科學(xué)研究院;海軍大連艦艇學(xué)院海洋測(cè)繪系;
【基金】：國(guó)家重點(diǎn)研發(fā)計(jì)劃(2016YFB0501702) 國(guó)家“九七三”重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(2013CB733302) 科技基礎(chǔ)性工作專(zhuān)項(xiàng)(2015FY310200) 國(guó)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(cè)量空間技術(shù)全球變化監(jiān)測(cè)項(xiàng)目(57173947)
【分類(lèi)號(hào)】：P223.39
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本文編號(hào)：2281529