Provided are a system for correcting a signal of an ultrasonic sensor according to a current weather condition, and a method of operating the same. The system for correcting a signal of an ultrasonic sensor according to a weather condition includes: a user terminal configured to externally acquire information about an ambient condition at a current position of a vehicle (for example, current temperature, and current humidity, and current atmospheric pressure) from an external server; and a vehicle terminal configured to calculate a current sound absorption coefficient based on the current ambient condition, determine whether a signal correction of the ultrasonic sensor mounted in the vehicle is needed by comparing the calculated current sound absorption coefficient with a preset standard sound absorption coefficient, and correct a received ultrasonic signal transmitted by the ultrasonic sensor and reflected from an obstacle based on a result determined by the vehicle terminal.

A method is disclosed for detecting atmospheric turbulence including aircraft induced wake turbulence and/or wind shear within an aperture associated with an aircraft approach or departure corridor around an airport. The method comprises transmitting into the aperture acoustic signals having a waveform suitable for pulse compression and receiving backscattered acoustic echoes of the acoustic signals from the atmospheric turbulence and/or wind shear. The method further includes processing the acoustic echoes in a matched filter receiver to provide a measure of the atmospheric turbulence and discriminating the aircraft induced demise time, being a time taken for the aircraft induced wake turbulence and/or wind shear to fall below a set threshold at least in the aperture. A system for detecting atmospheric turbulence including aircraft induced wake turbulence and/or wind shear associated with an aircraft approach or departure corridor around an airport is also disclosed.

An environmental parameter sensor for a mobile device is described comprising a first acoustic transducer; a second acoustic transducer arranged at a predetermined distance from the first acoustic transducer; a controller coupled to the first acoustic transducer and the second acoustic transducer; wherein the controller is configured to determine at least one of a time-of-flight value and an attenuation value of an acoustic signal between the first acoustic transducer and the second acoustic transducer and to determine at least one environmental parameter from the at least one of the time-of-flight value and the attenuation value The environmental parameter sensor may determine environmental parameters such as temperature, wind speed, and humidity from acoustic measurements.