Mert BEZCİOĞLU, Cemal Özer YİĞİT, Ahmet Anıl DİNDAR, Özgür AVCI

Yüksek zamansal çözünürlüklü çoklu-GNSS PPP-AR yönteminin yatay yönlü dinamik davranışları tespit edebilme yeteneğinin değerlendirilmesi

Bu çalışma geleneksel-Hassas Nokta Konumlama (PPP: Precise Point Positioning) ve PPP-AR (Ambiguity Resolution) yöntemlerinin yapı sağlığı izlemeleri ve Global Navigation Satellite Systems (GNSS)-sismolojisi uygulamalarındaki etkinliğini ve ilgili tekniklere çoklu-GNSS gözlemlerinin katkısını araştırmaktadır. Yöntemlerin performanslarını değerlendirmek için yatay yönde hareket edebilme kabiliyetine sahip bir sarsma tablası kullanılarak olası yapısal hareketleri temsil eden 5 mm ila 10 mm arasında değişen genliklere ve 0.3 Hz ila 1.2 Hz arasında frekanslara sahip harmonik salınımlar üretilmiştir. Ayrıca, 1989 Loma Prieta depremi, PPP tekniklerinin GNSS-sismolojisi uygulamalarındaki performanslarını incelemek için simule edilmiştir. 20 Hz örneklem aralığında toplanan veriler sadece-Global Positioning System (GPS) ve GPS/Galileo uydu gözlemleri kullanılarak geleneksel-PPP ve PPP-AR teknikleri ile değerlendirilmiş, elde edilen sonuçlar frekans ve zaman alanında Linear Variable Differential Transformer (LVDT) verileri ile karşılaştırılmıştır. Sonuçlar frekans alanında farklı uydu kombinasyonları ile iki yöntemden de elde edilen frekans ve genlik değerlerinin benzer olduğunu ifade ederken, zaman alanında PPP-AR tekniğinin geleneksel-PPP tekniğine olan üstünlüğünü ve çoklu-GNSS gözlemlerinin katkısını açık bir şekilde ortaya koymaktadır.

Anahtar Kelimeler:

GPS, Galileo, PPP, PPP-AR, Dinamik Deplasman

Evaluation of the ability of the high-rate multi-GNSS PPP-AR method to detect dynamic behaviors in horizontal direction

This study investigates the ability of traditional-PPP (Precise Point Positioning) and PPP-AR (Ambiguity Resolution) techniques in structural health monitoring and Global Navigation Satellite Systems (GNSS)-seismology applications, and the contribution of multi-GNSS observations to both methods. To evaluate the performances of the methods, harmonic oscillations with amplitudes ranging from 5 mm to 10 mm and frequency between 0.3 Hz and 1.2 Hz, representing possible structural motions, were generated using a shake table. Furthermore, the 1989 Loma Prieta earthquake was simulated to examine the performance of PPP techniques in GNSS-seismology applications. The data collected at 20 Hz sampling rate were evaluated employing the traditional-PPP and PPP-AR techniques using only-Global Positioning System (GPS) and GPS/Galileo satellite observations, and the results were compared with Linear Variable Differential Transformer (LVDT) data in the frequency and time domain. Although the outcomes revealed that the frequency and amplitude values obtained from both methods with different satellite combinations in the frequency domain were comparable to each other, they clearly demonstrate that the superiority of the PPP-AR technique over the traditional-PPP technique in the time domain and the contribution of multi-GNSS observations.

Keywords:

GPS, Galilo, PPP, PPP-AR, Dynamic displacement,

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