TY  - JOUR
T1  - GPS, GLONASS, Galileo ve BeiDou GNSS Sistemlerinin 1. ve 2. Temel Frekanslarının Doluluk Analizi
TT  - Availability Analysis of 1st and 2nd Fundamental Frequencies of GPS, GLONASS, Galileo and BeiDou GNSS Systems
AU  - Alçay, Salih
AU  - Öğütcü, Sermet
AU  - Özdemir, Behlül Numan
AU  - Buğdaycı, İlkay
PY  - 2023
DA  - June
Y2  - 2023
JF  - Necmettin Erbakan Üniversitesi Fen ve Mühendislik Bilimleri Dergisi
JO  - NEU Fen Muh Bil Der
PB  - Necmettin Erbakan University
WT  - DergiPark
SN  - 2667-7989
SP  - 14
EP  - 22
VL  - 5
IS  - 1
LA  - tr
AB  - Günümüzde tam kapasite ile konum belirleme hizmeti sunan dört Küresel Konum Belirleme Sistemi (GNSS) bulunmaktadır. Bunlar GPS, GLONASS, Galileo ve BeiDou’ dur. GPS ve GLONASS uzun yıllardır hizmet verirken, Galileo ve BeiDou son yıllarda dahil olmuştur. Bu çalışmada bu dört GNSS sisteminin 1. ve 2. temel frekanslarının doluluk durumu incelenmiştir. Bu amaçla 05.06.2023 tarihine ait 322 IGS-MGEX istasyonlarına ait (bu tarih için igs.ign.fr adresindeki bütün IGS istasyonları) veriler dikkate alınmıştır. Elde edilen sonuçlara göre GPS frekans doluluk oranlarının diğer uydu sistemlerine göre bir miktar daha iyi olduğu, doluluk oranlarının %96’nın üzerinde olduğu görülmüştür. Diğer uydu sistemlerinde de doluluk oranları GLONASS ikinci frekans hariç %94’ün üzerinde olduğu belirlenmiştir.
KW  - Beidou
KW  - Galileo
KW  - GLONASS
KW  - GPS
N2  - Today, there are four global positioning systems (GNSS) that provide positioning with full capacity. These are GPS, GLONASS, Galileo and BeiDou. While GPS and GLONASS provide positioning for many years, Galileo and BeiDou have been involved in recent years. In this study, the availability status of the 1st and 2nd fundamental frequencies of these four GNSS systems was investigated. For this purpose, the data of 322 IGS stations dated 05.06.2023 (all IGS stations for this date at igs.ign.fr) were taken into account. According to the results, it was seen that the GPS frequency availability rates were slightly better than other satellite systems, and the availability rates were above 96%. It has been determined that the availability rates in other satellite systems are above 94% except for the GLONASS second frequency.
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UR  - https://dergipark.org.tr/en/pub/neufmbd/issue//1307044
L1  - https://dergipark.org.tr/en/download/article-file/3176837
ER  -