The European Geostationary Navigation Overlay System (EGNOS) is being developed in Europe to provide GPS and GLONASS regional augmentation services to aviation, marifirne, and land users. EGNOS will provide the following services: i) GEO-based GPS-like Ranging signals to improve the availablity and continuity of GPS and GLONASS navigation services. ii) Ground Integrity Channel (GZC) to improve ...

The use of differential navigation techniques combined with GLONASS and GPS, collectively referred to as Global Navigation Satellite Service (GNSS), presents maritime authorities with an opportunity to provide highly precise navigation service for harbor entrance and approach areas with a reduced dependence on any one system. The use of 48 satellites (24 GPS and 24 GLONASS) also provides improv...

With more than 70 navigation satellites around the Earth, global navigation satellite systems (GNSS) users are fascinated to use multiple constellations to enhance positioning availability, accuracy, integrity, continuity, and robustness. As the Russian Global’naya Navigatsionnaya Sputnikovaya Sistema (GLONASS) has fully restored its constellation, not only does a combination of GLONASS and the...

Russia’s global navigation satellite system starts the upgrade to a new level. The first GLONASS space vehicle with a CDMA coded signal was launched in February 2011. The article gives a short overview about all transmitted GLONASS-K1 signals. The main focus of this article is the new GLONASS CDMA signal L3. The signal quality is assessed by analysing the purity and symmetry of the spectrum. Th...

The effectiveness of single-epoch integer ambiguity resolution, which provides centimeter-level relative positioning in real-time, is a function of the number, quality and type of carrier phase measurements available. We apply the Local-Minima Search (LMS) method epoch-by-epoch to GPS-GLONASS dual frequency carrier phase measurements taken over 2, 9 and 18 km baselines. While the application of...

The integration of GPS with GLONASS may be considered a major milestone in satellitebased positioning, because it can dramatically improve the reliability and productivity of said positioning. However, unlike GPS, GLONASS satellites transmit signals at different frequencies, which results in significant complexity in terms of modelling and ambiguity resolution for integrated GPS and GLONASS pos...

Benefits from the modernized US Global Positioning System (GPS), the revitalized Russian GLObal NAvigation Satellite System (GLONASS), and the newly-developed Chinese BeiDou Navigation Satellite System (BDS) and European Galileo, multi-constellation Global Navigation Satellite System (GNSS) has emerged as a powerful tool not only in positioning, navigation, and timing (PNT), but also in remote ...

Recently the Russian government issued a mandate on the use of their GLObal NAvigation Satellite System (GLONASS) for Russian operated aircraft [1]. There is some concern and uncertainty both in exactly what is required to satisfy the mandate and how best to conform to it. GLONASS recently re-established full operating capability and has 24 operational satellites in orbit. The addition of a sec...