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Journals / Harita Dergisi / 2010 / Cilt: 76 - Sayı: 143

(The accuracy assessment of Insar measurements)

InSAR ölçülerinin doğruluk araştırması

Yavuz Selim ŞENGÜN
Pages
19–25
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

It is evaluated that the reasons for these differences are InSAR error resources included in itself and postseismic deformation.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Interferometric Synthetic Aperture Radar (InSAR) is a new geodetic technique for determining earth topography and deformation and it does not need any land survey.
📊
Key Findings & Data:The measurements at GPS points were compared with the InSAR measurements at the same points for İzmit Earthquake and the difference was found as ±4 cm.
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Conclusion & Impact:It is evaluated that the reasons for these differences are InSAR error resources included in itself and postseismic deformation.
🔬Design:Survey & Empirical Study
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Interferometric Synthetic Aperture Radar (InSAR) is a new geodetic technique for determining earth topography and deformation and it does not need any land survey. InSAR measurements give information only in line of sight. These measurements may include topographic, orbital or atmospheric errors. The accuracy of these measurements was tested on İzmit Earthquake sample data. The measurements at GPS points were compared with the InSAR measurements at the same points for İzmit Earthquake and the difference was found as ±4 cm. To get rid of starting point error during the unwrapping of InSAR measurements, relative differences between the points are investigated. In this case the differences are +2 cm. It is evaluated that the reasons for these differences are InSAR error resources included in itself and postseismic deformation.

Özet

Yapay Açıklıklı Radar Interferometrisi (InSAR), yeryüzü topografyasının ve deformasyonun belirlenmesi için yeni bir jeodezik tekniktir ve yersel ölçümlere ihtiyaç duymaz. InSAR ölçüleri sadece uydu bakış doğrultusunda bilgi verir. Bu ölçüler yörünge, topografya veya atmosfer kaynaklı hataları içerisinde barındırabilir. Bu ölçülerin doğruluğu İzmit Depremi örnek verisi üzerinde test edilmiştir. İzmit depremiyle ilgili olarak bu bölgedeki GPS noktalarındaki ölçümlerle aynı noktalardaki InSAR ölçüleri karşılaştırılmış, aradaki fark yaklaşık ±4 cm bulunmuştur. InSAR ölçülerinin çözülmesi sırasında başlangıç noktası kaynaklı hatalardan kurtulabilmek amacıyla aynı noktalar arasındaki göreli farklar incelenmiştir. Bu durumda farklar ±2 cm'dir. Aradaki farkın nedeninin hem GPS hem de InSAR'ın kendi içerisinde barındırdığı hata kaynakları hem de postsismik deformasyon olduğu değerlendirilmiştir.

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Cite This Article

ŞENGÜN, Y. S. (2010). (The accuracy assessment of Insar measurements). Harita Dergisi, Cilt: 76 - Sayı: 143, 19–25. https://ajindex.com/articles/175525

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