SARAL测高卫星近海域波形重定新方法
发布时间：2018-08-26 09:12
【摘要】：利用AVISO提供的SARAL卫星浙江近海海域周年的WAVEFORM数据,通过对卫星波形分析,提出一种新的波形重定方法,该方法在顾及波形物理机制的基础上,根据各波形的特征进行重定。通过对重定前后的波形数据进行粗差剔除、共线平均和对比分析,结果表明:当纬度为27°左右时,未进行波形重定数据求得的平均海面高为10.770 m、标准差为4.515 m,而进行波形重定后数据求得的平均海面高为12.601 m、标准差为1.263 9 m;当纬度为30°左右时,未进行波形重定数据求得的平均海面高为12.236 m、标准差为1.877 m,而进行波形重定后数据求得的平均海面高为12.503 m、标准差为0.419 m。通过对波形重定前后卫星测高数据与验潮站数据对比,得到未进行波形重定的卫星测高数据与验潮站数据差值平均值为0.275 m、标准差为0.273 m,进行波形重定后卫星测高数据与验潮站数据差值平均值为0.046 m、标准差为0.049 m。研究结果显示利用本文提出的方法能显著提高卫星测高数据的精度与质量。
[Abstract]:Based on the annual WAVEFORM data of SARAL satellite in Zhejiang offshore area provided by AVISO, a new waveform redetermination method is proposed by analyzing the waveform of the satellite. The method is based on the physical mechanism of waveform and is redetermined according to the characteristics of each waveform. By eliminating gross error, collinear average and comparative analysis of waveform data before and after repositioning, the results show that: when latitude is about 27 掳, The mean sea surface height and standard deviation obtained from the data without waveform redetermination are 10.770 m and 4.515 m respectively, while the average sea surface height and standard deviation are 12.601 m and 1.263 9 m, respectively, when the latitude is about 30 掳, the mean sea surface height is 12.601 m and the standard deviation is 1.263 9 m. The average sea surface height and standard deviation of the data without waveform redetermination are 12.236 m and 1.877 m, while the average sea surface height and standard deviation are 12.503 m and 0.419 m respectively. By comparing the satellite altimetry data with the tide station data before and after the waveform realignment, The average value of the difference between the satellite altimetry data and the tide gauge data is 0.275 m, the standard deviation is 0.273 m, the average value of the difference between the satellite altimeter data and the tide gauge data is 0.046 m, and the standard deviation is 0.049 m. The results show that the accuracy and quality of satellite altimetry data can be improved significantly by using the method proposed in this paper.
【作者单位】： 河海大学地球科学与工程学院;
【分类号】：P228.3;P229
，
本文编号：2204396
[Abstract]:Based on the annual WAVEFORM data of SARAL satellite in Zhejiang offshore area provided by AVISO, a new waveform redetermination method is proposed by analyzing the waveform of the satellite. The method is based on the physical mechanism of waveform and is redetermined according to the characteristics of each waveform. By eliminating gross error, collinear average and comparative analysis of waveform data before and after repositioning, the results show that: when latitude is about 27 掳, The mean sea surface height and standard deviation obtained from the data without waveform redetermination are 10.770 m and 4.515 m respectively, while the average sea surface height and standard deviation are 12.601 m and 1.263 9 m, respectively, when the latitude is about 30 掳, the mean sea surface height is 12.601 m and the standard deviation is 1.263 9 m. The average sea surface height and standard deviation of the data without waveform redetermination are 12.236 m and 1.877 m, while the average sea surface height and standard deviation are 12.503 m and 0.419 m respectively. By comparing the satellite altimetry data with the tide station data before and after the waveform realignment, The average value of the difference between the satellite altimetry data and the tide gauge data is 0.275 m, the standard deviation is 0.273 m, the average value of the difference between the satellite altimeter data and the tide gauge data is 0.046 m, and the standard deviation is 0.049 m. The results show that the accuracy and quality of satellite altimetry data can be improved significantly by using the method proposed in this paper.
【作者单位】： 河海大学地球科学与工程学院;
【分类号】：P228.3;P229
，
本文编号：2204396
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