Method of determining a heading in the geographical north direction by means of an inertial unit
AssigneeSagem Defense Securite
InventorYves BECHERET
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Abstract
A method of determining a heading in the geographical North direction by means of an inertial sensor module having three rate gyro measurement axes and three accelerometer measurement axes, the method comprising the steps of: using data from the inertial sensor module in a North-seeking mode to obtain a first heading value; using data from the inertial sensor module in a gyro-compass mode to obtain a second heading value; and determining the heading in the North direction by using the first heading value and the second heading value.
Claims7
A method of determining a heading in the geographical North direction by means of an inertial sensor module having three rate gyro measurement axes and three accelerometer measurement axes, the method comprising the steps of:
- using data from the inertial sensor module in a North-seeking mode to obtain a first heading value;
- using data from the inertial sensor module in a gyro-compass mode to obtain a second heading value;
- and
- determining the heading in the North direction by using the first heading value and the second heading value.
Dependencies are inferred from the claim text.