TY - JOUR T1 - Assessing the Contribution of Galileo to GPS+GLONASS Single Point Positioning Navigation TT - Galileo’nun GPS+GLONASS Tek Nokta Konum Belirlemeye Katkısı AU - Öğütçü, Sermet PY - 2020 DA - September Y2 - 2020 DO - 10.31202/ecjse.754095 JF - El-Cezeri JO - ECJSE PB - Tayfun UYGUNOĞLU WT - DergiPark SN - 2148-3736 SP - 1377 EP - 1383 VL - 7 IS - 3 LA - en AB - In addition to the legacy GPS and GLONASS, a new global emerging system, European Galileo became operational for positioning, timing, and navigation purposes. In this study, the contribution of the Galileo constellation to GPS+GLONASS combined single point positioning (SPP) is investigated. A one-week of data in 2019 (DOY: 274-280) and 25 IGS-MGEX stations are chosen to conduct GPS+GLONASS and GPS+GLONASS+Galileo SPP. The results indicate that average Root Mean Square Errors (RMSE) of northing, easting and, up components are improved by 11%, 16%, and 4%, respectively. It is also observed that maximum errors of GPS+GLONASS SPP are significantly reduced when adding Galileo constellation. KW - Galileo KW - GLONASS KW - GPS KW - SPP N2 - İlk olarak ortaya çıkan küresel GPS ve GLONASS'a ek olarak, Avrupa Galileo uydu sistemi konumlandırma, zamanlama ve navigasyon amacıyla faaliyete geçtmiştir. Bu makalede, Galileo navigasyon uydularının GPS + GLONASS kombine tek nokta konumlandırmasına (SPP) katkısı incelenmiştir. GPS + GLONASS ve GPS + GLONASS + Galileo SPP değerlendirmeleri için 2019'daki bir haftalık veri (DOY: 274-280) ve 25 IGS-MGEX istasyonu seçilmiştir. Sonuçlar, kuzey, doğu ve yukarı bileşenlerin ortalama Karasel Ortalama Hatalarının (RMSE) sırasıyla %11,%16 ve %4 oranında iyileştirildiğini göstermektedir. Ayrıca, GPS+GLONASS SPP değerlendirmelerine ait maksimum hataların, Galileo uyduları eklendikten sonra ciddi oranda azaldığı gözlemlenmiştir. CR - Guo, F., Li, X., Zhang, X., Wang, J., 2017. 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