Net_Diff ile PRIDE yazılımlarının hassas nokta konumlama-belirsizlik çözümü (PPP-AR) performanslarının karşılaştırılması

Mutlak konum belirleme tekniği olan Hassas Nokta Konum Belirleme (Precise Point Positioning, PPP) yöntemi tek bir Küresel Navigasyon Uydu Sistemleri (Global Navigation Satellite Systems, GNSS) alıcısıyla konum bilgisi elde etmeye olanak sağlamaktadır. Bu durumun maliyet ve zaman tasarrufu, gözlem süresine bağlı olarak yüksek konum doğruluğu, pratik çözümler sunmasının yanı sıra yüksek hassasiyeti de beraberinde getirmesi son yıllarda PPP ve Hassas Mutlak Konum Belirleme-Belirsizlik Çözümü (PPP-Ambiguity Resolution, PPP-AR) yöntemlerine olan ilgiyi arttırmış ve bu sayede çok sayıda yazılım üretilmiştir. Bu çalışmada son yıllarda geliştirilmiş PPP-AR tekniği ile konum bilgisi elde etmeye imkân tanıyan Net_Diff ve PRIDE yazılımları kullanılarak yazılımların konum belirleme performansı incelenmiştir. Bu amaçla ISTA ve MERS Uluslararası GNSS Hizmeti (International GNSS Service, IGS) istasyonlarının yirmi günlük (29.10.2022-17.11.2022) gözlem verileri analiz edilmiştir. Değerlendirmelerde GPS, GLONASS, Galileo ve BeiDou uydu sistemleri kullanılmıştır. Yazılımlardan elde edilen sonuçlar istasyonların referans (IGS günlük çözüm) koordinat değerleriyle karşılaştırılmıştır. Çalışmada, Net_Diff yazılımı ile yatayda ortalama 6.2 mm ve düşeyde 12.9 mm konum doğruluğuna ulaşılırken, PRIDE yazılımında sırasıyla 2.7 mm ve 5.3 mm düzeyinde konum doğruluğu elde edilmiştir. Elde edilen sonuçlar PRIDE yazılımının, Net_Diff yazılımına göre daha yüksek nokta konumlandırma doğruluğuna ve hassasiyete sahip olduğunu açıkça ortaya koymaktadır.

Anahtar Kelimeler:

Net_Diff, PPP, PPP-AR, PRIDE

Comparison of precise point positioning-ambiguity resolution (PPP-AR) performances of Net_Diff and PRIDE software

Precise Point Positioning (PPP) method, which is an absolute positioning technique, allows to obtain position information with a single Global Navigation Satellite Systems (GNSS) receiver. This situation has increased the interest in PPP and Precise Point Positioning-Ambiguity Resolution (PPP-Ambiguity Resolution, PPP-AR) methods in recent years, as it offers cost and time savings, high positional accuracy depending on the observation time, practical solutions, resulting in the development of numerous software programs. In this study, the location determination performance of the software was examined by using Net_Diff and PRIDE software, which allows to obtain location information with the PPP-AR technique developed in recent years. For this purpose, twenty-day (29.10.2022-17.11.2022) observation data of ISTA and MERS International GNSS Service (International GNSS Service, IGS) stations were analyzed. GPS, GLONASS, Galileo and BeiDou satellite systems were used in the evaluations. The results obtained from the software were compared with the reference (IGS daily solution) coordinate values of the stations. In the study, while an average location accuracy of 6.2 mm horizontally and 12.9 mm vertically was achieved by Net_Diff software, location accuracy of 2.7 mm and 5.3 mm was obtained by PRIDE software respectively. The obtained results clearly demonstrate that PRIDE software has higher point location accuracy and sensitivity than Net_Diff software.

Keywords:

Net_Diff, PPP, PPP-AR, PRIDE,

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