Method for improving performance of a SODAR system
AssigneeElectro Magnetic Measurements Pty Ltd
InventorAndrew Louis Martin
Life of this patent
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Abstract
This invention relates to a method of reducing error in a SODAR system adapted to locate discontinuities in the atmosphere over a range extending away from an acoustic transmitter and receiver, the method comprising the steps of: measuring wind to determine either a substantially upwind direction or a substantially downwind direction relative to the transmitter; transmitting one or more forward or reverse acoustic chirps in the substantially upwind or downwind direction; receiving one or more acoustic echoes of the transmitted chirps; and processing the acoustic echoes to provide an indication of the discontinuities in the atmosphere over the range, thereby providing a wind shear profile.
Claims26
A method of reducing range error in a SODAR system adapted to locate discontinuities in the atmosphere over a range extending away from an acoustic transmitter and receiver, the method comprising the steps of:
- measuring wind to determine either a substantially upwind direction or a substantially downwind direction relative to the transmitter;
- transmitting one or more forward acoustic chirps in the substantially upwind direction and one or more reverse acoustic chirps in the substantially downwind direction using a table of chirp directions for each quadrant of wind direction which produces only positive range errors;
- receiving one or more acoustic echoes of the transmitted chirps;
- and
- processing the acoustic echoes to provide an indication of the discontinuities in the atmosphere over the range, thereby providing a wind shear profile.
A system for locating discontinuities in the atmosphere over a range extending away from an acoustic transmitter and receiver, the system comprising:
- a sensor adapted to determine either a substantially upwind direction or a substantially downwind direction relative to the transmitter;
- a transmitter adapted to transmit one or more forward acoustic chirps in the substantially upwind direction and one or more reverse acoustic chirps in the substantially downwind direction using a table of chirp directions for each quadrant of wind direction which produces only positive range errors;
- a receiver adapted to receive one or more acoustic echoes of the transmitted chirps;
- and
- a processor adapted to process the acoustic echoes to provide an indication of the discontinuities in the atmosphere over the range, thereby providing a wind shear profile.
Dependencies are inferred from the claim text.