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  1. 防災科研関係論文

On the importance of accurately ray-traced troposphere corrections for Interferometric SAR data

https://nied-repo.bosai.go.jp/records/4141
https://nied-repo.bosai.go.jp/records/4141
a15a3e29-0654-441e-a408-426b5a07ff87
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル On the importance of accurately ray-traced troposphere corrections for Interferometric SAR data
言語
言語 eng
著者 Thomas Hobiger

× Thomas Hobiger

en Thomas Hobiger

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Youhei Kinoshita

× Youhei Kinoshita

en Youhei Kinoshita

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Shingo Shimizu

× Shingo Shimizu

en Shingo Shimizu

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Ryuichi Ichikawa

× Ryuichi Ichikawa

en Ryuichi Ichikawa

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Masato Furuya

× Masato Furuya

en Masato Furuya

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Tetsuro Kondo

× Tetsuro Kondo

en Tetsuro Kondo

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Yasuhiro Koyama

× Yasuhiro Koyama

en Yasuhiro Koyama

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抄録
内容記述タイプ Other
内容記述 Numerical weather models offer the possibility to compute corrections for a variety of space geodetic applications, including remote sensing techniques like interferometric SAR. Due to the computational complexity, exact ray-tracing is avoided in many cases and mapping approaches are applied to transform vertically integrated delay corrections into slant direction. Such an approach works well as long as lateral atmospheric gradients are small enough to be neglected. But since such an approximation holds only for very rare cases it is investigated how horizontal gradients of different atmospheric constituents can evoke errors caused by the mapping strategy. Moreover, it is discussed how sudden changes of wet refractivity can easily lead to millimeter order biases when simplified methods are applied instead of ray-tracing. By an example, based on real InSAR data, the differences of the various troposphere correction schemes are evaluated and it is shown how the interpretation of the geophysical signals can be affected. In addition, it is studied to which extend troposphere noise can be reduced by applying the exact ray-tracing solution.
言語 en
書誌情報 en : JOURNAL OF GEODESY

巻 84, 号 9, p. 537-546
出版者
言語 en
出版者 SPRINGER
ISSN
収録物識別子タイプ EISSN
収録物識別子 1432-1394
DOI
関連識別子 10.1007/s00190-010-0393-3
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