METHOD RESOLVING AMBIGUITY OF PHASE MEASUREMENTS Russian patent published in 2000 - IPC

FIELD: radio engineering. SUBSTANCE: method resolving ambiguity of phase measurements by way of reception and processing of radio navigation signals of satellite radio navigation systems GLONASS and NAVSTAR consists in measurement of phases ϕ₁ and ϕ₂ in range from 0 to π on two carrier frequencies f₁ and f₂ being found in specified relation ≈9/7 relative one another. Then length of wave Λ₀ = 9λ₁ = 7λ₂ is synthesized with λ₁ and λ₂ being lengths of waves on carrier frequencies f₁ and f₂ correspondingly. Phase measurements ϕ₁ and ϕ₂ are used to determine number of periods r₁ and r₂ of lengths of waves λ₁ and λ₂ correspondingly contained in synthesized length of wave Λ₀ with the aid of body of mathematics related to theory of numbers. At same time pseudorange R_K to navigation satellites is measured by means of range finder code of high precision and evaluation of integral number of lengths of waves λ₁ and λ₂ present in measured pseudorange R_K is calculated. Later ambiguity is resolved by calculation of integral number of waves λ₁ and λ₂ present in measured pseudorange and of pseudoranges R_f1 and R_f2 themselves on carrier frequencies f₁ and f₂ with accuracy of phase of carrier. EFFECT: increased reliability of navigational determinations when carrier frequencies are measured by phase, implementation of condition of matching of carrier frequencies, improved mass and size characteristics of users of signals of satellite radio navigation systems.