Patent ID: 8451167

Claim:
Method for determining the position of a mobile Global Navigation Satellite System GNSS receiver including a means for receiving at least two frequencies and using at least four satellites, comprising the following steps: a. transmitting a first signal on a first frequency from a first satellite, b. transmitting two-frequency signals, denoted second and third signals respectively, on the first frequency and on a second frequency respectively, from a plurality of second satellites, each second satellite transmitting a second and a third signal, c. determining the position of the mobile GNSS receiver by: i. calculating at least four measured pseudo-distances corresponding to the distances between each satellite and the mobile GNSS receiver, ii. calculating an average estimated inter-frequency bias denoted ΔB estimated , between the second and third signals received in HF channels of the receiver, using the following equation: Δ ⁢ ⁢ B estimated ⁢ = def ⁢ 1 ( N - 1 ) ⁢ ∑ i = 2 N ⁢ ( pd ib ⁢ ⁢ meas - pd iameas ) where iε[ 2 , N] are second satellites and N−1 is the number of second satellites and pd ia-meas is a pseudo-distance between a second satellite i and the mobile GNSS receiver measured on the first frequency and pd ib-meas is a pseudo-distance between the second satellite i and the mobile GNSS receiver measured on the second frequency, iii. correcting first-measured pseudo-distances, also called single-frequency pseudo-distances that correspond to measured pseudo-distances between the first satellite and the receiver, using the average estimated inter-frequency bias denoted ΔBestimated.