Centre National Detudes Spatiales

Thales

Airbus Operations (s.a.s.)

Ecole Nationale De L'aviation Civile (e.n.a.c.)

Uti Limited Partnership

Ecole Nationale De L'aviation Civile

Airbus Operations Gmbh

Christophe Macabiau

Lionel Ries

Olivier Julien

Jean-Luc Issler

Jean Muller

Gerard Lachapelle

Pierre Neri

Alain Guillet

Mathias Van Den Bossche

Laurent Azoulai

Stéphane Corazza

M Elizabeth Cannon

Philippe Paimblanc

Paul Thevenon

Philippe Karouby

Michel Bousquet

Anne-Christine Escher

Jérémy Vezinet

Stéphane Cozzazza

A device for determining navigation parameters of an aircraft during a landing phase includes a video system including at least one digital video camera arranged on the aircraft, the digital video camera being configured to generate on the aircraft current video data relating to at least one characteristic point on the Earth, whose coordinates are known, and a data processing unit including an extended Kalman filter and configured to determine the navigation parameters on the basis of current navigation data of the aircraft, arising from a satellite navigation system, current inertial data of the aircraft, as well as said video data.

Method and a device for determining navigation parameters of an aircraft during a landing phase

A method for identifying transmitters by a terminal in a single-frequency network comprising a plurality of transmitters. The transmitters are synchronized and transmit with an artificial delay &#x3c4;, specific to each transmitter. The method comprises at least one step of acquiring the approximate position of the terminal {circumflex over (p)}, the position pof a list of transmitters {Tx} in the vicinity of the terminal and the delays &#x3c4;associated with them, a step of measuring pseudo-distances &#x3c1;between the transmitters and the terminal and a step of associating the measurements &#x3c1;with the transmitters of known positions pby minimizing a cost function, said cost function &#x3bd;(&#x3c1;,{circumflex over (p)},&#x3c3;) corresponding to the norm of the error between the measurements &#x3c1;and a model of measurements of the pseudo-distances applied to a permutation of the position of the transmitters &#x3c3;.

Method for identifying transmitters by a terminal in a single-frequency network

A method for guiding an aircraft during its final approach to a landing runway, whereby the aircraft is guided during its approach by aircraft position information obtained from an GNSS satellite navigation system, wherein: prior to the start of the final approach a first time tis determined corresponding with the start of said final approach and a second time tcorresponding with the landing of the aircraft on said runway, then a set of satellites is determined of the satellite navigation system for excluding from the calculation of said aircraft position information during at least a part of the time interval comprised between said first and second times; and during the final approach, the aircraft position information is determined while excluding the information corresponding with all the satellites of said set of satellites and the aircraft is guided along its final approach path by said position information.

Method and system for determining the position of an aircraft during its approach to a landing runway

The present invention relates to a method for protecting a radionavigation receiver user in relation to aberrant pseudo-range measurements. In the method, a measurement error is detected by a statistical estimation scheme based on calculating the residuals of the measurements.

Method for protecting a radio navigation receiver user against aberrant pseudo-range measurements

To receive a radio navigation signal modulated by a modulation waveform, the modulation waveform comprising a component BOC(n,m) and a component BOC(n,m), nbeing strictly less than n, a correlation is performed between a prompt local waveform and the modulation waveform and a correlation is performed between a shifted (forward or backward) local waveform and said modulation waveform, over a time interval of duration T. The prompt local waveform is generated in the guise of a binary waveform comprising over said time interval at least one waveform segment BOC(n,m) of a total duration of (1&#x2212;&#x3b1;)T over said time interval, &#x3b1;being a parameter greater than or equal to 0 and strictly less than 1. The shifted local waveform is generated in the guise of a binary waveform comprising over said time interval at least one waveform segment BOC(n,m) of a total duration of &#x3b1;T over said time interval, B being a parameter strictly greater than 0 and less than or equal to 1, and &#x3b1;being different from &#x3b1;.

Method of reception and receiver for a radio navigation signal modulated by a CBOC or TMBOC spread waveform

Disclosed is a method for receiving a radionavigation signal modulated by a composite waveform, the composite waveform comprising a linear combination with real-valued coefficients of a BOC(n,m) component and a BOC(n,m) component, ndiffering from n; in which a correlation is performed between a local waveform and the composite waveform over a time interval of duration T, wherein the local waveform is a binary waveform, formed over the time interval by an alternating succession comprising at least one BOC(n,m) waveform segment and at least one BOC(n,m) waveform segment, the at least one BOC(n,m) segment having a total duration of &#x3b1;T, &#x3b1; being strictly betweenand, the at least one BOC(n,m) segment having a total duration of (&#x2212;&#x3b1;)T.

Method of reception and receiver for a radio navigation signal modulated by a CBOC spread wave form

A method and apparatus for acquiring and tracking a BOC signal in a satellite navigation receiver includes a synthesized acquisition test function or a discriminator for code delay provided by combining a BOC autocorrelation function and a BOC/PRN cross-correlation function.

BOC signal acquisition and tracking method and apparatus

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Montauban, France

Christophe Macabiau