A receiver (12 or 30) or method uses an offset vector to provide seamless switching between a real-time kinematic (RTK) mode and a precise positioning mode (e.g., precise point positioning, PPP) mode. An offset module (130) or data processor (159) is arranged to determine an offset between precise position and the RTK position estimate. Upon loss of the RTK signal, switching to a precise position mode is based on a last available RTK position (e.g., if the precise position mode is converged on a position solution with resolved ambiguities of the carrier phase), wherein the next precise position estimate is compensated by the offset or reference frame bias to avoid a jump or discontinuity in the next precise position estimate.

Satellite navigation receiver and method for switching between real-time kinematic mode and precise positioning mode

A method of generating scintillation prediction data comprises: • a) for a plurality of satellites (12A), and reference stations (10A, 10B, 10C, 10D) measuring phase scintillation data, satellite by satellite for each reference station during multiple epochs (t-2, t-1, t, t+k); • b) forecasting an expected phase scintillation value for each satellite and reference station for a period of at least 24 hours based on a cyclical prediction model; • c) for a given user location (20) and a given satellite, spatially interpolating the expected phase scintillation values of the plurality of reference stations to determine a predicted phase scintillation index; • d) repeating step c) for further satellites visible from the user location.

Ionospheric scintillation prediction

A method for Real Time Kinematic satellite positioning includes receiving navigation satellite carrier signals, receiving phase correction signals from a reference station, calculating a set of integer phase ambiguities from double-differenced measurements of pseudo-range and phase, and calculating a relative position of the mobile receiver from the set of integer phase ambiguities and the double-differenced measurements of pseudo-range and phase.

Systems and methods for real time kinematic satellite positioning

The invention provides a navigation positioning method based on interchangeability of multiple navigation satellites, and relates to the field of GNSS satellite navigation. By use of GNSS observation data obtained from global tracking station networks, through application of a multi-GNSS precision clock error fusion solution method, clock error products of each satellite navigation system under a unified reference are obtained, pre-pushing is carried out, and the clock error products are broadcast to users so that seamless application of the navigation observation data of each satellite navigation system by the users is realized, and the availability and the continuity of navigation positioning of a multi-GNSS navigation system are improved.

Navigation positioning method based on interchangeability of multiple navigation satellites

A timing signal generation device includes a GPS receiver, an atomic oscillator, a phase comparator, a frequency abnormality determination unit, a sensor unit, and a determination unit. The GPS receiver outputs 1 PPS. The atomic oscillator 30 outputs a clock signal for synchronization with 1 PPS. The phase comparator compares 1 PPS and the clock signal in phase. The frequency abnormality determination unit determines whether or not the frequency of the clock signal is abnormal, by using a comparison result of the phase comparator, and outputs frequency abnormality information including a determination result. The sensor unit detects environment information which has an influence on the comparison result. The determination unit determines a cause of the abnormality by using the frequency abnormality information and the environment information.

Timing signal generation device, electronic device, and moving object

A method is provided for estimating parameters useful to determine the position of a global navigation satellite system (GNSS) receiver or a change in the position thereof. The method includes the steps of: obtaining at least one GNSS signal received at the GNSS receiver from each of a plurality of GNSS satellites; obtaining, from at least one network node, precise satellite information on: (i) the orbit or position of at least one of the plurality of GNSS satellites, and (ii) a clock offset of at least one of the plurality of GNSS satellites; identifying, among the obtained GNSS signals, a subset of at least one GNSS signal possibly affected by a cycle slip, the identified subset being hereinafter referred to as cycle-slip affected subset; and estimating parameters useful to determine the position of the GNSS receiver or a change in the position of the GNSS receiver using at least some of the obtained GNSS signals which are not in the cycle-slip affected subset, and the precise satellite information.

Advanced global navigation satellite systems (gnss) positioning using precise satellite information

A method is provided for estimating parameters useful for determining the position of a Global Navigation Satellite System (GNSS) receiver or a change in its position. The method includes the steps of: obtaining (s10) at least one GNSS signal, receiving at the GNSS receiver of each of a plurality of GNSS satellites; Obtaining (s20) from at least one network node, precise satellite information regarding: (i) the orbit of at least one of the plurality of GNSS satellites, and (ii) a clock offset of at least one of the plurality of GNSS satellites; Identifying (s30) among the obtained GNSS signals, a subset of at least one GNSS signal that is possibly affected by a cycle slip, the identified subset being hereinafter referred to as a cycle set biased subset; and estimating (s40) parameters useful for determining the position of the GNSS receiver or a change in the position of the GNSS receiver using at least some of the obtained GNSS signals that are not in the cycle-skewed subset, and the precise satellite information.

Advanced positioning with global navigation satellite systems (GNSS) using accurate satellite information

Ein Verfahren wird bereitgestellt zum Schatzen von Parametern, die nutzlich sind zum Bestimmen der Position eines Globale-Navigationssatellitensystem-(GNSS)-Empfangers oder einer Anderung in der Position desselben Das Verfahren enthalt die Schritte: Erhalten (s10) von mindestens einem GNSS-Signal, Empfangen an dem GNSS-Empfanger von jedem einer Vielzahl von GNSS-Satelliten; Erhalten (s20) von mindestens einem Netzwerkknoten, von praziser Satelliteninformation hinsichtlich: (i) der Umlaufbahn oder Position von mindestens einem der Vielzahl von GNSS-Satelliten, und (ii) eines Uhren-Versatzes von mindestens einem der Vielzahl der GNSS-Satelliten; Identifizieren (s30) unter den erhaltenen GNSS-Signalen, eines Teilsatzes von mindestens einem GNSS-Signal, das moglicherweise beeinflusst ist durch eine Zyklusverrutschung, wobei der identifizierte Teilsatz hier im Folgenden bezeichnet wird als ein durch Zyklusverrutschung beeinflusster Teilsatz; und Schatzen (s40) von Parametern, die nutzlich sind zum Bestimmen der Position des GNSS-Empfangers oder eine Anderung in der Position des GNSS-Empfangers unter Verwendung von mindestens einigen der erhaltenen GNSS-Signalen, die nicht in dem durch Zyklusverrutschung beeinflussten Teilsatz sind, und der prazisen Satelliteninformation

Fortschrittliche Positionierung mit globalen Navigationssatellitensystemen (GNSS) unter Verwendung von präziser Satelliteninformation

Ein Verfahren wird bereitgestellt zum Schatzen von Parametern, die nutzlich sind zum Bestimmen der Position eines Globale-Navigationssatellitensystem-(GNSS)-Empfangers oder einer Anderung in der Position desselben. A method is provided for estimating parameters that are useful for determining the position of a global-Navigationssatellitensystem- (GNSS) receiver, or a change in the same position. Das Verfahren enthalt die Schritte: Erhalten (s10) von mindestens einem GNSS-Signal, Empfangen an dem GNSS-Empfanger von jedem einer Vielzahl von GNSS-Satelliten; The method includes the steps of: obtaining (S10) of at least one GNSS signal received at the GNSS receiver to each of a plurality of GNSS satellites; Erhalten (s20) von mindestens einem Netzwerkknoten, von praziser Satelliteninformation hinsichtlich: (i) der Umlaufbahn oder Position von mindestens einem der Vielzahl von GNSS-Satelliten, und (ii) eines Uhren-Versatzes von mindestens einem der Vielzahl der GNSS-Satelliten; Obtaining (S20) of at least one network node, of a more specific satellite information regarding: (i) of the orbit or position of at least one of the plurality of GNSS satellites, and (ii) a clock offset from at least one of the plurality of GNSS satellites; Identifizieren (s30) unter den erhaltenen GNSS-Signalen, eines Teilsatzes von mindestens einem GNSS-Signal, das moglicherweise beeinflusst ist durch eine Zyklusverrutschung, wobei der identifizierte Teilsatz hier im Folgenden bezeichnet wird als ein durch Zyklusverrutschung beeinflusster Teilsatz; Identifying (s30) obtained under the GNSS signals, a subset of at least one GNSS signal that may be affected by a Zyklusverrutschung, wherein the identified subset is here referred to as a influenced by Zyklusverrutschung subset; und Schatzen (s40) von Parametern, die nutzlich sind zum Bestimmen der Position des GNSS-Empfangers oder eine Anderung in der Position des GNSS-Empfangers unter Verwendung von mindestens einigen der erhaltenen GNSS-Signalen, die nicht in dem durch Zyklusverrutschung beeinflussten Teilsatz sind, und der prazisen Satelliteninformation. and resources (s40) of parameters that are useful for determining the position of the GNSS receiver or a change in the position of the GNSS receiver using at least some of the received GNSS signals in the affected by Zyklusverrutschung subset are not, and the precise satellite information.

Fortschrittliche Positionierung mit globalen Navigationssatellitensystemen (GNSS) unter Verwendung von präziser Satelliteninformation Advanced positioning with global navigation satellite systems (GNSS), using precise satellite information

Kenneth Donald Doucet

Papers

Advanced global navigation satellite systems (gnss) positioning using precise satellite information

Advanced positioning with global navigation satellite systems (GNSS) using accurate satellite information

Fortschrittliche Positionierung mit globalen Navigationssatellitensystemen (GNSS) unter Verwendung von präziser Satelliteninformation

Fortschrittliche Positionierung mit globalen Navigationssatellitensystemen (GNSS) unter Verwendung von präziser Satelliteninformation Advanced positioning with global navigation satellite systems (GNSS), using precise satellite information