Optical instruments and appliances
Part of: 901420 — Instruments and appliances for aeronautical or space navigation (other than compasses):
H285036 · 2020-06-26 — Ruling request regarding the tariff classification of an Inertial Measurement Unit
In addition to your written submission, our decision below also takes into consideration a teleconference meeting with Northrup Grumman officials on June 11, 2020. FACTS: The following facts are based on the information you provided, including the marketing document you provided with your submission. Generally, an IMU is an electronic device that measures and reports its motion using accelerometers and gyroscopes. They are components of inertial navigation systems and are used in aircraft, spacecraft, unmanned aerial vehicles, watercraft, and other vehicles. An IMU collects acceleration and…
N096831 · 2010-03-29 — The tariff classification of Inertial Measurement Units and Enclosures for Inertial Measurement Units exported from Canada
You state that an IMU “is the main component of inertial guidance systems used in air, space, and watercraft, including guided missiles. An IMU works by sensing motion – including the type, rate, and direction of that motion – using a combination of accelerometers and gyroscopes. The data collected from these sensors allows a computer to track a craft’s position, using a method known as dead reckoning.” Most IMUs contain three accelerometers and three gyroscopes. The accelerometers measure inertial acceleration (also known as G-forces), while the gyroscopes measure rotational position. An IMU…
E83612 · 1999-06-30 — The tariff classification of the Geo Star Tracker from Germany
The Geo Star Tracker is intended for use on a commercial communications satellites. Communications satellites must stay in position and at the correct attitude (alignment in relation to the earth) once in orbit. This is accomplished by the attitude control system. The satellite will ascertain its position and attitude, then relay this information to either an on-board spacecraft control processor or to a control station on earth. Necessary corrections to the attitude or position are made based on that information. The Geo Star Tracker is one method of determining position and attitude. The…
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