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A New Method of Precise Jason-2 Altimeter Calibration Using a Microwave Transponder

机译：使用微波应答器精确校准Jason-2高度计的新方法

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摘要

This study presents a new method of precise altimeter absolute calibration using a dedicated microwave transponder, which acts as an altimeter signal repeater that can be deployed at any sub-track position both in coastal regions and inland. The Austrian Academy of Sciences operates an altimeter transponder at the Gavdos calibration/validation facility located beneath a Jason cross-over point.We discuss the capabilities and strengths of the transponder technique in general and in the particular case of a dedicated calibration campaign carried out in 2011. For the accomplishment of this campaign, including 26 ascending and descending Jason-2 passes, the onboard Poseidon-3 altimeter had to be switched to the DIODE/DEM mode for every overflight. Four different methods have been developed to analyze the transponder generated waveforms, provided by S-IGDR and S-GDR products, respectively.The resulting biases of the altimetric ranges have proven to be stable (3 mm rms) and agree to a large extent among the proposed algorithms. However, the absolute bias value of 25.8 ± 0.3 cm derived from the transponder calibration technique shows a significant deviation of several centimeters compared with the ones resulting from conventional techniques. Possible causes of this behavior are under further investigation.
机译：这项研究提出了一种使用专用微波应答器的精确高度计绝对校准的新方法，该微波应答器用作高度计信号中继器，可以部署在沿海地区和内陆的任何子轨道位置。奥地利科学院在Jason交叉点下方的Gavdos校准/验证设施中运行高度计应答器，我们讨论了应答器技术的能力和优势，特别是在进行了专门的校准活动的情况下2011年。为完成这项运动，包括完成26次Jason-2上升和下降通道，机上的Poseidon-3高度计必须在每次飞越时都切换到DIODE / DEM模式。已开发出四种不同的方法来分别分析由S-IGDR和S-GDR产品提供的应答器生成的波形。事实证明，所产生的高度范围的偏差是稳定的（3 mm rms），并且在很大程度上彼此一致提出的算法。但是，与常规技术相比，应答器校准技术得出的绝对偏差值为25.8±0.3 cm，显示出几厘米的显着偏差。此行为的可能原因正在进一步调查中。

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  • 来源
    《Marine Geodesy》 |2012年第4suppla期|337-362|共26页
  • 作者

    W. HAUSLEITNER; F. MOSER; J.-D. DESJONQUERES; F. BOY; N. PICOT; J. WEINGRILL; S. MERTIKAS; A. DASKALAKIS;

  • 作者单位

    Satellite Geodesy Department, Space Research Institute, Austrian Academy of Sciences, Graz, Austria,Space Research Institute, Schmiedlstrasse 6,8042 Graz, Austria;

    Satellite Geodesy Department, Space Research Institute, Austrian Academy of Sciences, Graz, Austria;

    Toulouse Space Centre (CST), Centre National d'Etudes Spatiales (CNES),Toulouse, France;

    Toulouse Space Centre (CST), Centre National d'Etudes Spatiales (CNES),Toulouse, France;

    Toulouse Space Centre (CST), Centre National d'Etudes Spatiales (CNES),Toulouse, France;

    Satellite Geodesy Department, Space Research Institute, Austrian Academy of Sciences, Graz, Austria;

    Laboratory of Geodesy & Geomatics Engineering, Technical University of Crete, Chania, Greece;

    Laboratory of Geodesy & Geomatics Engineering, Technical University of Crete, Chania, Greece;

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

    transponder; jason; altimeter; absolute calibration;

    机译：应答器杰森高度表;绝对校准;

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