【摘要】：利用AVISO提供的SARAL衛(wèi)星浙江近海海域周年的WAVEFORM數(shù)據(jù),通過(guò)對(duì)衛(wèi)星波形分析,提出一種新的波形重定方法,該方法在顧及波形物理機(jī)制的基礎(chǔ)上,根據(jù)各波形的特征進(jìn)行重定。通過(guò)對(duì)重定前后的波形數(shù)據(jù)進(jìn)行粗差剔除、共線平均和對(duì)比分析,結(jié)果表明:當(dāng)緯度為27°左右時(shí),未進(jìn)行波形重定數(shù)據(jù)求得的平均海面高為10.770 m、標(biāo)準(zhǔn)差為4.515 m,而進(jìn)行波形重定后數(shù)據(jù)求得的平均海面高為12.601 m、標(biāo)準(zhǔn)差為1.263 9 m;當(dāng)緯度為30°左右時(shí),未進(jìn)行波形重定數(shù)據(jù)求得的平均海面高為12.236 m、標(biāo)準(zhǔn)差為1.877 m,而進(jìn)行波形重定后數(shù)據(jù)求得的平均海面高為12.503 m、標(biāo)準(zhǔn)差為0.419 m。通過(guò)對(duì)波形重定前后衛(wèi)星測(cè)高數(shù)據(jù)與驗(yàn)潮站數(shù)據(jù)對(duì)比,得到未進(jìn)行波形重定的衛(wèi)星測(cè)高數(shù)據(jù)與驗(yàn)潮站數(shù)據(jù)差值平均值為0.275 m、標(biāo)準(zhǔn)差為0.273 m,進(jìn)行波形重定后衛(wèi)星測(cè)高數(shù)據(jù)與驗(yàn)潮站數(shù)據(jù)差值平均值為0.046 m、標(biāo)準(zhǔn)差為0.049 m。研究結(jié)果顯示利用本文提出的方法能顯著提高衛(wèi)星測(cè)高數(shù)據(jù)的精度與質(zhì)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 擄, 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 擄, 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.
【作者單位】： 河海大學(xué)地球科學(xué)與工程學(xué)院;
【分類號(hào)】：P228.3;P229
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本文編號(hào)：2204396