Ultrasonic Deep Depth Ocean Velocity Mapper

This work proposed to utilize GHz CMOS integrated ultrasonic pulses to characterize the ocean water velocity. The sensors will be small chiplets, ~ 1 mm-cube volume, small enough to be placed inside thin plastic fiber which can be delivered into water from a small form factor delivery unit into water to very deep waters. The chipsets can measure salinity, temperature, sound velocity, water velocity, providing all the parameters needed to measure the ocean water velocity with high degree of accuracy. Furthermore, the spatial density of the sensors on the fiber can be high from every cm to every meter, providing a highly detailed mode of the velocity along the fiber length. Each sensor can provide the data every 100 microseconds, enabling 10-kHz bandwidth in reading each sensor. The power consumption is low, with ultralow power sleep mode per sensor, enabling a long lifetime persistent sound velocity mapping in deep ocean.