A process and system for detection and telemetry using electromagnetic radiation pulses allows characterization of a radial velocity distribution as a function of a separation distance within an exploration zone. An impulse response from the system is used for decomposing a measurement signal which is collected for each acquisition sequence performed for a useful measurement. The result of the decomposition includes an estimate of the radial velocity distribution as a function of the separation distance.

A process and system for detection and telemetry using electromagnetic radiation pulses allows characterization of a radial velocity distribution as a function of a separation distance within an exploration zone. An impulse response from the system is used for decomposing a measurement signal which is collected for each acquisition sequence performed for a useful measurement. The result of the decomposition includes an estimate of the radial velocity distribution as a function of the separation distance.

The invention is a method of determining wind speed components using a ground-based LiDAR sensor (1) comprising determining the wind direction (Dir) and the average wind speed (v) in a measurement plane (PM), then constructing a projection line perpendicular to wind direction (Dir) in measurement plane (PM), and subsequently determining a time shift (δt) between the measurement points (b1, b2, b3, b4) and the projection line, to determine corrected measurement signals.

The invention is a method of determining wind speed components using a ground-based LiDAR sensor (1) comprising determining the wind direction (Dir) and the average wind speed (v) in a measurement plane (PM), then constructing a projection line perpendicular to wind direction (Dir) in measurement plane (PM), and subsequently determining a time shift (δt) between the measurement points (b1, b2, b3, b4) and the projection line, to determine corrected measurement signals.

A frequency shift correcting unit (25) which corrects a frequency shift of a plurality of first signal spectra within the same time range with respect to a frequency of first laser light beam and corrects a frequency shift of a plurality of second signal spectra within the same time range with respect to a frequency of second laser light beam, and a spectrum integrating unit (26) which integrates a plurality of first signal spectra corrected by the frequency shift correcting unit (25) and integrates a plurality of second signal spectra corrected by the frequency shift correcting unit (25) are provided, and a molecular concentration calculating unit (27) calculates a concentration of molecules in the atmosphere from the first and second signal spectra integrated by the spectrum calculating unit (26).

A method for processing telemetry data for estimating a wind speed. The method includes a hybridization by temporal combination, and/or by weighting, and/or by averaged projection.

A method for processing telemetry data for estimating a wind speed. The method includes a hybridization by temporal combination, and/or by weighting, and/or by averaged projection.

The present invention refers to a fog detector for a vehicle, with a specially shaped lens, comprising: a light emitter (1) configured to emit at least one light pulse; a first optical element (2) configured to direct light of the at least one light pulse along a first optical path; a second optical element (4) configured to direct scattered light of the at least one light pulse along a second optical path to a focal spot of a light receiver (3) of the fog detector, wherein the focal spot is spatially offset from an axis extending along the first optical path; the first optical element (2) and the second optical element (4) being arranged and constructed such that the first and the second optical path at least partially overlap with each other and the first optical element (2) and the second optical element (4) being arranged and constructed such that the light emitter (1) and the light receiver (3) are operable on a common optical axis.

The present invention also refers to a method for fog detection and a driving support system comprising the fog detector. Furthermore, the present invention refers to a vehicle comprising the driving support system. Furthermore, the present invention refers to a computer program, a data carrier signal, and a computer-readable medium.

The present invention refers to a fog detector for a vehicle, with a specially shaped lens, comprising: a light emitter (1) configured to emit at least one light pulse; a first optical element (2) configured to direct light of the at least one light pulse along a first optical path; a second optical element (4) configured to direct scattered light of the at least one light pulse along a second optical path to a focal spot of a light receiver (3) of the fog detector, wherein the focal spot is spatially offset from an axis extending along the first optical path; the first optical element (2) and the second optical element (4) being arranged and constructed such that the first and the second optical path at least partially overlap with each other and the first optical element (2) and the second optical element (4) being arranged and constructed such that the light emitter (1) and the light receiver (3) are operable on a common optical axis.

The present invention also refers to a method for fog detection and a driving support system comprising the fog detector. Furthermore, the present invention refers to a vehicle comprising the driving support system. Furthermore, the present invention refers to a computer program, a data carrier signal, and a computer-readable medium.

A method of gas detection comprises emitting radiation of different wavelengths across the absorption spectrum of a gas towards a target area; and analysing the spectrum of returned laser light from the target area to identify the gas in the target area using the time correlation of the emitted radiation and the returning radiation. The radiation is modulated using respective orthogonal modulation codes for the different wavelengths and the modulation codes are modified by the insertion of a gap between each bit of the modulation code, the gap having a duration of at least n-1 bits where n is the number of different wavelengths.