Aerospace & Defense Technology - May 2022 - 9

UAV Navigation Systems
altitudes. Existing frameworks for GPS certification for IFR
flight, for example, certify that systems will work with certain
acceptable amounts of interference. With GNSS prediction
intelligence, we can now pinpoint exactly how much interference
will affect a given flight path at a given time, and devise
flight plans to ensure aircraft remain within those thresholds.
For the first time, we can:
* Predict GNSS reliability over dynamic areas: New prediction
technologies provide instant access to GNSS reliability
forecasts - down to 1-meter resolution, second by second, for
up to 72 hours into the future. This can be useful for determining
precisely where and when to fly electric vertical takeoff and
landing (eVTOL) multi-rotor, and other types of UAS.
* Forecast risk: Mission planners can use GNSS prediction data
to identify best- and worst-case coverage when piloting
unmanned aircraft. For example, they could designate " fly
anytime " areas, " no fly " areas, and " fly sometimes " areas,
where specific paths are designated good at specific times.
These insights can be used for concept of operations (CONOPS)
activities, when selecting sites for vertiports, defining
fixed routes through certain geographies, and more. Just knowing
the quality of the data navigation systems will have to
work with allows for much more accurate risk analysis.
* Optimize mission planning: In a military context, predictive
insights can be used in both offensive and defensive
operations that rely on GNSS. It's now possible to pinpoint
with a high degree of accuracy where an aircraft can operate,
for how long, where it will have redundancy, and what the
consequences will be if it needs to change routes. Those characteristics
can inform decisions such as at which altitude to
fly, or whether to proceed with a mission now or wait 30
minutes for more favorable conditions. In an adversarial environment,
knowing the expected reliability of GNSS signals in
specific times and places makes it easier to determine which
signals are authentic and which might be spoofed.
Unleashing the Aviation Models of Tomorrow
In many ways, low altitude aviation is in a similar place as the
early days of flight, when we had no way to predict weather. In
those days, aircraft losses were a regular occurrence, especially
when flying through storms at night, because we just didn't
understand how they would perform in bad weather and had no
way to predict it. Fast forward a century, and pilots can access
worldwide weather within seconds from anywhere, and simply
navigate away from storms.
The progress of low-altitude aircraft and drones is following
a similar path. Thanks to novel predictive approaches, we can
forecast GNSS performance with confidence anywhere around
the globe. By knowing exactly what to expect, we can mitigate
interference, plan around it, maximize situational awareness,
and even improve performance, unleashing the future of
unmanned civilian and military aircraft that we've been waiting
for.
This article was written by Jeremy Bennington, VP of PNT Assurance,
Spirent Communications (San Jose, CA). For more information,
visit http://info.hotims.com/82321-500.
Aerospace & Defense Technology, May 2022
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Aerospace & Defense Technology - May 2022

Table of Contents for the Digital Edition of Aerospace & Defense Technology - May 2022

Aerospace & Defense Technology - May 2022 - Intro
Aerospace & Defense Technology - May 2022 - Cov 4
Aerospace & Defense Technology - May 2022 - Cov 1
Aerospace & Defense Technology - May 2022 - Cov 2
Aerospace & Defense Technology - May 2022 - 1
Aerospace & Defense Technology - May 2022 - 2
Aerospace & Defense Technology - May 2022 - 3
Aerospace & Defense Technology - May 2022 - 4
Aerospace & Defense Technology - May 2022 - 5
Aerospace & Defense Technology - May 2022 - 6
Aerospace & Defense Technology - May 2022 - 7
Aerospace & Defense Technology - May 2022 - 8
Aerospace & Defense Technology - May 2022 - 9
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Aerospace & Defense Technology - May 2022 - 48
Aerospace & Defense Technology - May 2022 - Cov 3
Aerospace & Defense Technology - May 2022 - Cov 4
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