GLONASS CDMA L3 ambiguity resolution and positioning

Zaminpardaz, Safoora; Teunissen, Peter; Nadarajah, Nandakumaran

doi:10.1007/s10291-016-0544-y

Cited by 40 publications

(12 citation statements)

References 13 publications

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“…Since the stations in use are static and their surrounding environment almost remains unchanged over time, the multipath influence on a signal of a specific frequency is expected to repeat when the Galileo receiversatellite geometry repeats after 10 sidereal days. Therefore by subtracting the corrected DD observations corresponding with the same satellite geometry (obtained every 10 sidereal days), the adverse multipath impact can be largely eliminated (Bock 1991;Genrich and Bock 1992;Zaminpardaz et al 2016). Table 3 lists the estimated standard deviations of the Galileo code σ p j and phase σ φ j observations with and without multipath corrections.…”

Section: Multipath Performancementioning

confidence: 99%

Analysis of Galileo IOV + FOC signals and E5 RTK performance

Zaminpardaz

Teunissen

2017

GPS Solut

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The current Galileo constellation in April 2017 comprises both IOV (In-Orbit validation) and FOC (Full Operational Capability) satellites transmitting signals on five frequencies, i.e. E1, E5a, E5b, E5, and E6. We analyze the power, multipath and noise of 2 these signals using the data collected by four short baselines of various lengths and receiver/antenna types in Perth, Australia as well as the Netherlands. In our analysis, the Galileo signals, except E5, show different relative noise and multipath performance for different receiver/antenna types. The E5 signal, with a weak dependency on the type of receiver/antenna, shows a significantly lower level of multipath and noise with respect to the other signals. Estimations of the E5 code standard deviation based on the data of each of the mentioned baselines gives a value of about 6 cm, which is further reduced to about 1 cm once the data are corrected for multipath. Due to the superior stochastic properties of E5 signal compared to the other Galileo signals, we further analyze the short-baseline RTK (Real-Time Kinematic) performance of the Galileo standalone E5 observations. Our findings confirm that the Galileo E5 data, if corrected for the multipath effect, can make (almost) instantaneous ambiguity resolution feasible already based on the current constellation.

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Section: Multipath Performancementioning

confidence: 99%

Analysis of Galileo IOV + FOC signals and E5 RTK performance

Zaminpardaz

Teunissen

2017

GPS Solut

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“…A first CDMA signal in the L3 band was introduced by the GLONASS-K1 satellite launched in 2011 and is also made available by the GLONASS-M satellites launched since 2014. An initial assessment of GLONASS CDMA L3 ambiguity resolution and positioning performance is given in (Zaminpardaz et al 2017). Further signals will be added with each new generation of GLONASS satellites, whereby CDMA signals will also be transmitted in the L1 and L2 bands to improve interoperability with other GNSSs.…”

Section: Discussionmentioning

confidence: 99%

A new GLONASS FDMA model

Teunissen

2019

GPS Solut

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We introduce a new formulation of the double-differenced GLONASS FDMA model. It closely resembles that of CDMAbased systems and it guarantees the estimability of the newly defined GLONASS ambiguities. The formulation is made possible because of our defining new concept of integer-estimability and the analytical construction of a special integer matrix canonical decomposition. As a result, an easy-to-compute new design matrix is created that automatically establishes the integer-estimability of the ambiguities. The presented model is generally applicable, and its close resemblance to its CDMA-counterparts implies that available CDMA-based GNSS software is easily modified and that existing methods of integer ambiguity resolution can be directly applied. Also, because of their similar structure, many of the available CDMA results with corresponding insights can now be directly translated to the GLONASS case. We make use of this property to provide insight into the ambiguity resolution capabilities of the model and to analyze the characteristics of the GLONASS ambiguity dilution of precision.

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“…Therefore, there are six satellites in the current GLONASS constellation, i.e., PRNs R04, R05, R09, R12, R21 and R26, which in addition to FDMA signals, also transmit CDMA signals as well. The first analysis of GLONASS L3 ambiguity resolution and positioning was carried out in Zaminpardaz et al (2016Zaminpardaz et al ( , 2017 using the data of the satellite pair R21-R26.…”

Section: Introductionmentioning

confidence: 99%

GLONASS–only FDMA+CDMA RTK: Performance and outlook

2021

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An assessment of standalone GLONASS RTK performance is provided using its FDMA and CDMA signals. The new integer-estimable GLONASS FDMA model (Teunissen 2019), which guarantees the integer-estimability of its ambiguities, is employed. We introduce the combined integer-estimable GLONASS FDMA+CDMA model and compare its strength against the FDMA model for instantaneous integer ambiguity resolution and positioning. Various combinations of GLONASS signals are considered including FDMA L1, FDMA+CDMA L1+L3, FDMA L1+L2 and FDMA+CDMA L1+L2+L3. To provide insight into the current RTK performance of GLONASS, we used observations of a short baseline to analyze the integer ambiguity resolution success rate and positioning precision, formally and empirically. To provide insight into the future RTK performance of GLONASS, we present a formal analysis of the integer ambiguity resolution success rate and ADOP, assuming that all the GLONASS satellites transmit FDMA L1, L2 and CDMA L3 signals. A formal analysis of standalone GLONASS ambiguity resolution based on current and future GLONASS constellation is then presented for different locations around the world.

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GLONASS CDMA L3 ambiguity resolution and positioning

Cited by 40 publications

References 13 publications

Analysis of Galileo IOV + FOC signals and E5 RTK performance

Analysis of Galileo IOV + FOC signals and E5 RTK performance

A new GLONASS FDMA model

GLONASS–only FDMA+CDMA RTK: Performance and outlook

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