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首页> 外文期刊>Marine Geodesy >Assessment of Cryosat-2 and SARAL/AltiKa altimetry for measuring inland water and coastal sea level variations: A case study on Tibetan Plateau lake and Taiwan Coast
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Assessment of Cryosat-2 and SARAL/AltiKa altimetry for measuring inland water and coastal sea level variations: A case study on Tibetan Plateau lake and Taiwan Coast

机译：评估CryoSat-2和Saral / Altika Altimetry用于测量内陆水和沿海海平面的变化：以藏高原湖和台湾海岸为例

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摘要

Satellite altimetry has been proven as an effective technology to accurately measure water level, ice elevation, and flat land surface changes since the 1990s. To overcome limitations of pulse-limited altimetry, new altimetric missions such as Cryosat-2 and Satellite with ARgos and AltiKa (SARAL/AltiKa), have been designed to have higher along-track spatial resolution to measure more accurately inland water levels for small water bodies, and coastal sea level changes. In this study, we evaluate the performance of Cryosat-2 low-resolution (LRM) and SARin modes and SARAL/AltiKa Ka-band data on two connected lakes in central Tibetan Plateau, and in the coastal region of Taiwan. Results are compared with in situ tide gauge data in Taiwan and altimetric lake level time series from the CNES Hydroweb database. Our results show that water level change trends observed by Cryosat-2 20-Hz retracked observations, the SARAL/AltiKa 40-Hz Ice-1 retracked data, and the Hydroweb measurements are consistent with the estimated water level trend of similar to 0.30m/y, during 2011-2017, and 2013-2015, for the Tibetan Migriggyangzham Co and Dorsoidong Co, respectively. For the coastal region, the performance of SARAL/AltiKa is better than that of Cryosat-2 LRM data in Taiwan. This finding demonstrates the superiority of the Ka-band over Ku-band radar altimetry.
机译：自20世纪90年代以来，已被证明是准确测量水位，冰盖和平地表面变化的有效技术的卫星高度迁移。为了克服脉冲有限的高度测量法的限制，新的Altimetric任务，如Cryosat-2和带Argos和Altika（Saral / Altika）的卫星，设计用于沿着跟踪空间分辨率更高，以测量小水的更准确的内陆水平尸体和沿海海平面的变化。在这项研究中，我们评估了在西藏高原中部两张连接湖泊和台湾沿海地区的两台连接湖泊的低温-2低分辨率（LRM）和Saral / Altika Ka频段数据的性能。从CNES Hydroweb数据库中与台湾的原位潮仪表数据进行了比较的结果，与CNES HydroWeb数据库中的Altimetric Lake Leady序列进行了比较。我们的研究结果表明，使用CryoSat-2 20-Hz再生观测观察的水位变化趋势，SARAL / ALTIKA 40-Hz ICE-1再包的数据，HydroWeb测量与估计的水位趋势相似至0.30米/ Y，2011-2017和2013-2015，分别为西藏Migriggyangzham Co和Dorsoidong Co。对于沿海地区，SARAL / ALTIKA的表现优于台湾的CRYOSAT-2 LRM数据。这一发现展示了KU带雷达Altimetry的KA波段的优越性。

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  • 来源
    《Marine Geodesy》 |2019年第4期|327-343|共17页
  • 作者

    Kao Huan-Chin; Kuo Chung-Yen; Tseng Kuo-Hsin; Shum C. K.; Tseng Tzu-Pang; Jia Yuan-Yuan; Yang Ting-Yi; Ali Tang A.; Yi Yuchan; Hussain Dostdar;

  • 作者单位

    Natl Cheng Kung Univ Dept Geomat 1 Univ Rd Tainan 70101 Taiwan;

    Natl Cheng Kung Univ Dept Geomat 1 Univ Rd Tainan 70101 Taiwan;

    Natl Cent Univ Ctr Space & Remote Sensing Res Taoyuan Taiwan;

    Ohio State Univ Div Geodet Sci Sch Earth Sci Columbus OH 43210 USA|Chinese Acad Sci Inst Geodesy & Geophys Wuhan Hubei Peoples R China;

    Geosci Australia Symonston ACT Australia;

    Ohio State Univ Div Geodet Sci Sch Earth Sci Columbus OH 43210 USA;

    Ohio State Univ Div Geodet Sci Sch Earth Sci Columbus OH 43210 USA;

    Amer Univ Sharjah Dept Civil Engn Sharjah U Arab Emirates;

    Ohio State Univ Div Geodet Sci Sch Earth Sci Columbus OH 43210 USA;

    Natl Cheng Kung Univ Dept Geomat 1 Univ Rd Tainan 70101 Taiwan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Satellite altimetry; SARAL; AltiKa; CryoSat-2; inland water;

    机译：卫星Altimetry;Saral;Altika;Cryosat-2;内陆水;

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