Global Navigation Satellite System (GNSS) positioning has characteristics of simple operation, high efficiency and precision technique for landslide surface monitoring. In recent years, finalization modern GNSS systems Galileo BeiDou brought a possibility multi-GNSS positioning. The paper focuses on evaluation possible benefits constellations in While simulating observational conditions selecte...

Bu çalışmada, aralarında Türkiye’nin de yer aldığı 30 ülkenin 100 civarında bilim üssünün bulunduğu Antarktika kıtasında farklı meslek disiplinlerince gerçekleştirilecek çalışmalarda gereksinim duyulan 3-Boyutlu (3B) konum bilgisinin üretilmesinde uydu-bazlı belirleme yöntemleri içerisinde alan gerçek-zamanlı Hassas Nokta Konum Belirleme (RT-PPP) tekniğinin kullanılabilirliği ele alınmıştır. Uy...

Currently, ultra-rapid orbits play an important role in the high-speed development of global navigation satellite system (GNSS) real-time applications. This contribution focuses on the impact of the fitting arc length of observed orbits and solar radiation pressure (SRP) on the orbit prediction performance for GPS, GLONASS, Galileo and BeiDou. One full year's precise ephemerides during 2015 wer...

Global positioning systems first became available for private use in 1995. Since the introduction of NAVSTAR-GPS (Navigation System with Time and Ranging–Global Positioning System) and GLONASS (Globaluaya Navigatsionnaya Sputnikovaya Sistema, Global Navigation Satellite System), such systems have quickly become indispensable in a wide range of applications. Above all, GPS is used today by a lar...

Knowing where the vehicles are, what the drivers doing and monitoring every event in real time is the key parameters for a well-managed decision-making process. In this paper, a novel approach for control and monitoring of a fleet management system using three elements including GPS/GLONASS-based automatic vehicle locators (called Rad100), GPRS/SMS GSM cellular network and web-based software (c...

A programmable, real-time, digital signal processing (DSP), least-mean-squares (LMS) interference canceler was developed and demonstrated as a successful method of excising theGLONASS satellite L-band downlink signals from the 100 m Green Bank Telescope (GBT). This canceler has the potential for aiding the observation of redshifted OH lines near 1600 MHz in the presence of GLONASS signals. Our ...

Multiple global and regional navigation satellite systems are currently being developed. In addition to the already available GPS and GLONASS constellations, Galileo and BeiDou satellites have been launched, as well as one QZSS satellite and other regional satellites. At the same time GPS and GLONASS are being modernized. Highprecision positioning applications that rely on carrierphase ambiguit...

Bu çalışma, Magic GNSS yazılımı kullanılarak farklı günlerinde yükseklik açıları altında yalnızca GPS, GLONASS ve kombine GPS/GLONASS gözlemlerinin çeşitli çözümlerinin etkilerini araştırmak içindir. Uydu sayısının artan veya azalan ölçüm doğruluğu üzerindeki için günleri dikkate alınmıştır. Değerlendirme, ANOVA Post Hoc gibi istatistiksel testlere dayanmaktadır. Çalışmanın amaçlarını gerçekleş...

Code multipath is an unmanaged error source in precise global navigation satellite system (GNSS) observation processing that limits GNSS positioning accuracy. A new technique for mitigating multipath by installing a wave-absorbing shield is presented in this paper. The wave-absorbing shield was designed according to a GNSS requirement of received signals and collected measurements to achieve go...

The recently developed Flower Constellations have the satellites following the same relative trajectory with respect to an Earth rotating reference frame. This allows you to design an approximate uniform relative trajectory over the region of interest (which can be global) and uniformly distribute in time the satellites along the relative trajectory. Based on this idea, a new constellation of 3...