摘要
在对T／P卫星4年1992年10月-1996年10月测高数据的编辑及预处理基础上，采用stacking处理技术构造出中国近海及邻域（0°—40°N，105°—135°E）相对于GRS80参考椭球的30’×30’年平均海平面，其总体精度达到±83cm（均方根）水平。验证了中国近海及邻域的平均海平面在总体上呈东南高、西北低的趋势。利用JGM-3和OSU91A混合模型的重力大地水准面，直接从平均海平面中扣除大地水准面起伏的影响，并采用“剪切”法得到中国近海及邻域完整到20阶次的海面地形模型的球谐函数表达式，验证了中国近海及邻域海面地形在总体上为正的格局，并对其构造特征作了初步探讨。
In thes paper, fompear(1992-10-1996-10) altimeter dha from Topex / poseidon (T/ p)satollite over the Seas adjacent to China (0°-40°N 105°-135° E) are analyzed and preprocessed to elindnde tbe gross ermrs in the altimeter dat and the affections of geophysical environmnt.Thn they are used to determne a 30' ｘ 30' mean sea surface relative to GRS80 Reference Ellipsoid with the stacking method, i.e. the collinear tracks of T/ p satellite are staCked at 'normal poiflts' to product the mean theks. The sthcking procedare provides a sighificant compression of the original raw data and allows us to neglect the influence of various instantaneous oceanographic phenomena. The result of a cross-over analysis shows that the precision of the mean sea surfase is t 8.3cm(RMS). In order to detedrine the sea surfaCe topography, we empoy a straight-forward method,i.e. the contributions of the hybrid geoid model combined by the JGM-3 and the OSU91A geopotential models are deducted from the mean sea surface. Then a 'tallored' method is adopted to determine the spherical harTnohics coefficients of the sea surface topograph of the region whose degree and order is up to 20. The bend of 'southeast high and northwest low' can be seen cleary from the mean sea surfase in the region, and it also can be seen that the sea surfase topography is positive.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1999年第4期403-409,共7页
Oceanologia Et Limnologia Sinica
基金
国家自然科学基金!49634140
关键词
T/P测高资料
平均海平面
海面地形
中国近海
T/P altimeter data
Mean sea surfase
Sea surfase topogmphy
The seas adjacent to China
