INERTIAL SYSTEM FOR GRAVITY DIFFERENCE MEASUREMENT
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United States of America Patent
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Issued Date -
Apr 20, 2017
app pub date -
Oct 15, 2015
filing date -
Oct 15, 2015
priority date (Note) -
Abandoned
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Abstract
The inertial system for gravity difference measurement uses COTS nano accelerometer and a strapdown Global Navigation Satellite System (GNSS)-aided inertial measurement unit (IMU). The former has low measurement noise density, while the latter is used to analytically stabilize the platform. Stochastic modeling of the gravity anomaly is utilized (as opposed to the deterministic modeling of causes and effects) to simplify the algorithm. The algorithm aims at finding relative changes between points, as opposed to absolute values at the points, which allows for high relative precision required in many applications.
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