Feasibility of maintaining satellite altimetry calibration site based on qianliyan islet at the Yellow Sea

IF 2.8 4区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS
Bin Guan , Zhongmiao Sun , Lei Yang , Zhenhe Zhai , Jian Ma
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Abstract

The calibration of the sea surface height (SSH) measured by satellite altimeters is essential to understand altimeter biases. Many factors affects the construction and maintenance of a permanent calibration site. In order to calibrate Chinese satellite altimetry missions, the feasibility of maintaining a calibration site based on the Qianliyan islet in Yellow Sea of China is taken into account. The related calibration facilities, such as the permanent tide gauge, GNSS reference station and meteorological station, were already operated by the Ministry of Natural Resources of China. The data could be fully used for satellite altimeter calibration with small fiscal expenditure. In addition, the location and marine environments of Qianliyan were discussed. Finally, we used the Jason-3 mission to check the possibility of calibration works. The result indicates that the brightness temperatures of three channels measured by microwave radiometer (MWR) and the derived wet tropospheric correction varies smoothly, which means the land contamination to MWR could be ignored. The high frequency waveforms at the Qianliyan site present no obvious difference from the normal waveforms received by satellite radar altimeter over the open ocean. In conclusion, the Qianliyan islet will not influence satellite altimetry observation. Following these analyses, a possible layout and mechanism of the Qianliyan calibration site are proposed.

黄海千里岩岛卫星定标站点维护的可行性
卫星高度计测量的海面高度(SSH)的校准是了解高度计偏差的必要条件。许多因素影响永久性校准场地的建设和维护。为了对中国卫星测高任务进行定标,考虑了在中国黄海千里岩岛建立定标站点的可行性。中国自然资源部已经在运营永久性验潮仪、GNSS参考站和气象站等相关校准设施。这些数据可以充分用于卫星高度计的校准,而财政支出很少。此外,还讨论了千里岩的地理位置和海洋环境。最后,我们使用Jason-3任务来检查校准工作的可能性。结果表明,微波辐射计测得的3个通道的亮度温度和得到的湿对流层改正量变化平稳,表明陆地对微波辐射计的污染可以忽略不计。千里岩站点的高频波形与卫星雷达高度计在公海上接收到的正常波形没有明显差异。综上所述,千里岩岛不会对卫星测高产生影响。在此基础上,提出了千里岩定标场的可能布局和机制。
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来源期刊
Geodesy and Geodynamics
Geodesy and Geodynamics GEOCHEMISTRY & GEOPHYSICS-
CiteScore
4.40
自引率
4.20%
发文量
566
审稿时长
69 days
期刊介绍: Geodesy and Geodynamics launched in October, 2010, and is a bimonthly publication. It is sponsored jointly by Institute of Seismology, China Earthquake Administration, Science Press, and another six agencies. It is an international journal with a Chinese heart. Geodesy and Geodynamics is committed to the publication of quality scientific papers in English in the fields of geodesy and geodynamics from authors around the world. Its aim is to promote a combination between Geodesy and Geodynamics, deepen the application of Geodesy in the field of Geoscience and quicken worldwide fellows'' understanding on scientific research activity in China. It mainly publishes newest research achievements in the field of Geodesy, Geodynamics, Science of Disaster and so on. Aims and Scope: new theories and methods of geodesy; new results of monitoring and studying crustal movement and deformation by using geodetic theories and methods; new ways and achievements in earthquake-prediction investigation by using geodetic theories and methods; new results of crustal movement and deformation studies by using other geologic, hydrological, and geophysical theories and methods; new results of satellite gravity measurements; new development and results of space-to-ground observation technology.
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