Document ID: chunk:federal_register_of_legislation:F2024L01024:front:0:p221
Version: federal_register_of_legislation:F2024L01024
Segment Type: other
Provision Reference: 
Character Range: 632219–635218

without the use of any aiding references; or
2. Being "space‑qualified" and providing angular rate measurements having an "angle random walk" along any axis of less (better) than or equal to 0.1 degree per square root hour.
                   Note: 7A003.d.2. does not apply to 'inertial measurement equipment or systems' that contain "spinning mass gyros" as the only type of gyro.
7. A. 004. 'Star trackers' and components therefor, as follows:
N.B.: SEE ALSO 7A104.
a. 'Star trackers' with a specified azimuth "accuracy" of equal to or less (better) than 20 seconds of arc throughout the specified lifetime of the equipment;
7. A. 004. b. Components specially designed for equipment specified by 7A004.a. as follows:
1. Optical heads or baffles;
2. Data processing units.

Technical Note:

For the purposes of 7A004.a., 'star trackers' are also referred to as stellar attitude sensors or gyro-astro compasses.
7. A. 005. "Satellite navigation system" receiving equipment having any of the following and specially designed components therefor:
N.B.: SEE ALSO 7A105.
N.B.: For equipment specially designed for military use, see Military Goods Controls.
a. Employing a decryption algorithm specially designed or modified for government use to access the ranging code for position and time; or
b. Employing 'adaptive antenna systems'.
Note: 7A005.b. does not apply to "satellite navigation system" receiving equipment that only uses components designed to filter, switch, or combine signals from multiple omni‑directional antennae that do not implement adaptive antenna techniques.
Technical Note:
For the purposes of 7A005.b., 'adaptive antenna systems' dynamically generate one or more spatial nulls in an antenna array pattern by signal processing in the time domain or frequency domain.
7. A. 006. Airborne altimeters operating at frequencies other than 4.2 to 4.4 GHz inclusive and having any of the following:
N.B.: SEE ALSO 7A106.
a. 'Power management'; or
b. Using phase shift key modulation.
Technical Note:
For the purposes of 7A006.a., 'power management' is changing the transmitted power of the altimeter signal so that received power at the "aircraft" altitude is always at the minimum necessary to determine the altitude.
7. A. 008. Underwater sonar navigation systems using doppler velocity or correlation velocity logs integrated with a heading source and having a positioning "accuracy" of equal to or less (better) than 3% of distance travelled "Circular Error Probable" ("CEP") and specially designed components therefor.
Note: 7A008 does not apply to systems specially designed for installation on surface vessels or systems requiring acoustic beacons or buoys to provide positioning data.
N.B.: See 6A001.a. for acoustic systems, and 6A001.b. for correlation‑velocity and Doppler‑velocity sonar log equipment. See 8A002 for other marine systems.
7. A. 101. Linear accelerometers, other than those specified by 7A001, designed for use in inertial navigation systems or in guidance