Maximum attainable height

One of the criteria used to determine the appropriate class of a UAS is itsmaximum achievable altitude, whether this is defined by inherent performance limitations or constrained by software-imposed boundaries. In either case, the maximum altitude must be validated: performance-based limits must bemeasured, while software boundaries must be* verified through controlled testing*.

A variety of measurement tools are permitted under the relevant standard, depending on the application. These include:

• Laser Range Finder (HC only)– Specifically used for High Complexity (HC) applications where precise line-of-sight measurements are required.
• Barometers– Used to measure altitude based on atmospheric pressure changes, suitable for general altitude tracking.
• Global Navigation Satellite System (GNSS)– Provides altitude data via satellite positioning, commonly used for onboard navigation systems.
• External Cameras– Employed for visual verification of altitude using scaled references or tracking markers.
• Suspended Line (HC only)– A mechanical method of altitude measurement, applicable in HC environments for validation purposes.

All altitude verification tests are conducted within ourdedicated segregated airspace in Tulsa, Oklahoma, ensuring a controlled and compliant environment for reliable and repeatable testing.