In this paper, combined GPS and GLONASS positioning systems are discussed and some solutions have been proposed to improve the accuracy of navigation. Global Satellite Navigation System (GNSS) is able to provide position, velocity and time with respect to coordinated universal time. GNSS positioning is based on received satellite signals, so its performance is highly dependent on the quality of...

Abstract GNSS satellite and receiving antennas exhibit group delay variations (GDV), which affect code pseudorange measurements. Like antenna phase center variations, measurements, they are frequency-dependent vary with the direction of transmitted received signal. observations contain combined contributions receiver antennas. If absolute GDV available for antennas, can be determined. In 2019, ...

The dwarf satellite galaxies in the Local Group are generally considered to be hosted in dark matter subhalos that survived the disruptive processes during infall onto their host halos. It has recently been argued that if the majority of satellites entered the Milky Way halo in a group rather than individually, this could explain the spatial and dynamical peculiarities of its satellite distribu...

In [1] a Third Party Listening Test (TPLT) was introduced using pre-recorded conversations in Russian, German and English language to assess and verify the quality of eCall systems (In-vehicle Systems, IVS). The comparison of different languages shall verify the possibility for IVS manufacturers to optimize performance of their systems for the homologation tests according to MGS R55531 [2] base...

GNSS teknolojisi, orman kaynaklarının araştırılması ve izlenmesi için güçlü bir araç haline gelmiştir. Ancak, ormanlık/ağaçlık alanlarda örtüsü sinyalleri uydu sayısı üzerinde olumsuz etkiye sahiptir. Bu yüzden hassas konum belirlemek mümkün olmayabilmektedir. Uydu jeodezisinde analiz tekniklerinde yaşanılan gelişmeler ile sadece alıcısı kullanarak üzeri açık santimetre düzeyinde konumlama yapı...

Performance of 24h static Precise Point Positioning (PPP) solutions based on multi-GNSS precise satellite orbit and clock products from four analysis centers seven various constellation combinations was studied to evaluate their quality characteristics. Data ten European Chinese GNSS stations 152 days long period year 2020 were processed. Obtained coordinates firstly compared with those provide...