Abstract
In this paper, by using differential measurements based around two SCP-1000 MEMS (microelectromechanical systems) sensors, a method of depth detection is proposed. A very-low-frequency (VLF) communications channel updates the moving sensor and provides corrections (along with an accelerometer, temperature, and humidity sensor for more precise measurements). For this, a single sensor, a SCP-1000 sensor made by VTI of Finland is used. These tiny chips, when used with the provided algorithms and internal temperature sensor, enable altitude measurements with resolutions better than1.5 Pa (-3.5 inches) across a dynamic range of 90 kPa (-34,750 feet).
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