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Office National D'etudes Et De Recherches Aerospatiales

Onera

Chan, Hian Lim

Lesturgie, Marc

Marc Lesturgie

Dominique Poullin

G&eacute;rard Thouvenel

Azarian Sylvain

Hian Lim Chan

A system to acquire and track vehicles travelling in airspace, sea and land via a constellation of satellites. The system includes: (a) means for detecting a first signal from a vehicle; (b) a process for detecting anomaly from the first signal and determining whether it occurs inside or outside a first radar mode coverage area; (c) means for detecting a second signal from the vehicle under a first radar mode if the anomaly occurs inside its coverage area; (d) means for detecting a third signal from the vehicle under a second radar mode if the anomaly occurs outside the first radar mode coverage area; and (e) means for (i) refining the second or third signal from the vehicle under a third radar mode, such that the first, second, third and fourth detecting means are sequentially activated to detect the first, second and third signals by each satellite.

Global integrity check system and associated method

The present disclosure relates to a method for monitoring targets on a runway, wherein emitting modules and receiving modules are alternately distributed along each one of longitudinal sides of the runway. Orthogonal signals are emitted in a narrowband by the emitting modules and coherently received in a coherent manner by the receiving modules. An object is detected on the runway on the basis of a distribution of the modules into meshes each including three pairs of neighbouring emitting modules and receiving modules and on the basis of a radio location of the object through triangulation and interferometry in at least one mesh. The modules are also used for analyzing a target moving on the runway, and for monitoring the trajectographies of an air target in the surroundings of the runway.

Multistatic radar system for airport monitoring

A system for detecting mobile bodies, using digital telebroadcasting transmissions of an array of terrestrial transmitters. The digital telebroadcast transmissions include a plurality of carriers, afforded symbol-based digital modulation, processed by carrier-wise orthogonal frequency multiplexing. After its reception stages, the receiver includes a processor for performing a discrimination of backscattering the transmissions, according to distance/Doppler bins. A reference pathway receives and demodulates the direct signal received from one of the transmitters. The processor includes a Doppler distribution, the Doppler pathways of which are each assigned to a respective frequency shift, then a distance compressor that yields samples arranged in the distance/Doppler bins. After coherent Doppler integration, a postprocessing with tracking contrasts the echoes obtained in these bins, to obtain radar plots containing position/velocity information on one or more objects.

System for detecting mobile receivers, using digital telebroadcasts transmissions of a ground transmitter network

Growing community of inventors

Palaiseau, France

Marc Lesturgie