Sonar aquatic imager for measuring aquatic disturbances

A method of detecting a thermal interface disturbing event in a thermal interface of a body of water, the method comprising utilizing at least one SA imaging installation, the SA imaging installation comprising:

• a platform which includes a cross member, at least one telescoping arm extending orthogonally from the cross member and attached directly or indirectly to the cross member at a telescoping arm proximal end, a buoy attached to a distal end of the telescoping arm, a first pillar and a second pillar, the pillars spaced apart a distance, attached directly or indirectly to the cross member and extending orthogonally from the cross member;
• a sonar wave emitter which is mounted on the first pillar and is configured to emit a sonar wave signal;
• a reflected wave detector, which is mounted on the second pillar and includes either a one dimensional array of pressure transducers or a two dimensional array of pressure transducers, the reflected wave detector configured to receive a reflected wave signal;
• at least a first and a second thermal sensor mounted on the platform, the first thermal sensor vertically disposed from the sonar wave emitter a first height and the second thermal sensor vertically disposed from the first thermal sensor a second height;
• a vector network analyzer, the vector network analyzer including a Global Navigation Satellite System (GNSS) and an at least one timer, the vector network analyzer in electrical communication with the sonar wave emitter via a first wire and the reflected wave detector via a second wire;
• and a computer which includes a sonar software programme, which is in electronic communication with the first and second thermal sensors and the vector network analyzer, the method comprising locating the platform such that the first thermal sensor is above the thermal interface and the second thermal sensor is below the thermal interface, emitting a sonar wave from the sonar wave emitter to the thermal interface, detecting a reflected wave reflected from the thermal interface with the one or two dimensional array of pressure sensors housed in the reflected wave detector, and determining a phase shift between the emitted sonar wave and the reflected wave with the vector network analyzer.