| 摘要: |
| 联合Jason-1/2、T/P、Envisat、ERS-1/2、Geosat等多代卫星测高数据计算中国近海及邻域（0°~42°N，100°~140°E）2′×2′重力异常。对卫星测高数据分别进行共线处理和自交叉点平差，并以T/P卫星测高数据为基准进行多星数据联合平差，有效削弱了卫星测高数据的时变影响和不协调性；利用逆Vening-Meinesz公式计算重力异常，与船测重力相比，均方根误差为5.4mGal。结果表明，通过引入高精度的卫星测高数据，结合多项平差处理手段，提高了海洋重力异常的计算精度。 |
| 关键词: 卫星测高 交叉点平差 逆Vening-Meinesz公式 重力异常 |
| DOI： |
| 分类号:p228.3 |
| 基金项目:海洋公益性行业科研专项（201305032）、中欧龙计划合作项目（ID.10466） |
|
| Calculation of marine gravity fields by using multi-generation satellite altimetry data |
|
Li Jia-jun,Wan Jian-hua,Liu Shan-wei and Yang Jun-gang
|
|
School of Geosciences China University of PetroleumHua Dong,School of Geosciences China University of PetroleumHua Dong,School of Geosciences China University of PetroleumHua Dong,First Institute of Oceanography,State Oceanic Administration
|
| Abstract: |
| Calcaulate the 2 'x 2' resolution marine gravity anomaly over china offshore and its adjacent areas (0°~42°N，100°~140°E)with Geosat、ERS-1/2、Envisat、T/P、Jason-1/2 multi-generation satellite altimetry data.Collinear process and self-crossover adjustment were done on the data,then do combined adjustment taking the T/P data as the reference data,and can weak the time-varying influence and the coordination of satellite altimeter data.Then calculate the marine gravity field using the inverse Vening-Meinesz formula.Compared with shipborne gravity data, the root mean square error is 5.4mGal.The results show that, using the satellite altimetry data of high precision and a number of adjustment means can improve the precision of marine gravity anomaly. |
| Key words: Satellite altimetry crossover adjustment inverse Vening-Meinesz formula gravity anomaly |