Ambiguity Function Method Scheme for Aircraft Attitude Sensor Utilising GPS/GLONASS Carrier Phase Measurement

Abstract

When the receivers of GPS, GLONASS, COMPASS and other such systems are equipped with multiple antennas, they can give attitude information. Based on the difference carrier phase equations established in local level frame (LLF), a new algorithm is presented to resolve aircraft attitude determination problems in real-time. Presuming that the cycle integer ambiguity is known, the measurement equations have attitude analytical resolutions using single difference (SD) equations of two navigation satellites in-view. Similar with SD process, the double difference (DD) measurements are established and analysed. In addition, the SD and DD algorithms are capable of reducing the integer search space into some discrete point space and then the ambiguity function method (AFM) resolves the ambiguity function within the point solutions space. Therefore the procedures have very low computation, thus saving time. The hardware architecture has been realised using multiple GPS/GLONASS OEMs. The experimental results have demonstrated that the proposed approach is effective and can satisfy the requirement of real-time application in cases of GPS, and combined GPS, and GLONASS.

Improving positioning accuracy of aircraft using SPP method in GLONASS system

“…Furthermore, for the quality of GLONASS positioning in civil aviation, the use of observations from GLONASS-K generation satellites is an interesting issue, as shown in the paper (Dumas, 2011). In paper (Jin et al, 2009), the ambiguity solution was estimated using GPS/GLONASS data for purpose of aircraft attitude orientation. More recently, a scientific issue of interest using GLONASS is also the continuous monitoring and optimisation of flight trajectory with control functions during approach and landing (Skrypnik & Arefyeveva, 2017;Baburov et al, 2017;Skrypnik et al, 2018;Gorskiy et al, 2019;Skrypnik & Arefyev, 2020).…”

Small batteryless wireless solar powered GPS receivers for subcentimeter land deformation monitoring

“…AFM even with modification is extremely computationally intensive. However, despite this shortcoming due to its simplicity and its invariance to cycle slips it is commonly found in literature even today in such papers as [36] and [32]. Of the other methods, cycle slips must be corrected or ambiguities reinitialised.…”