Feature: Avionics
Screen of Spirent’s GNSS Foresight Visualisation Tool in downtown Detroit, US. In dense urban areas, signals are severely disrupted by surroundings. The bottom bar represents the timeline for a certain point and shows that even the most degraded areas of signal have times of day when performance is reliable
provides best-case, worst-case and 90th-percentile predictions over a given service area, to determine where GPS can always be assured.
ray tracing to predict and map areas where GNSS signals might be degraded, and when. Drone operators can use Foresight before and during a drone’s flight, to identify, anticipate and avoid areas of known GPS degradation. Foresight is available as two
separate solutions, depending on the requirement: Foresight Live calculates GNSS for every metre, every second, from 1-100m above ground, for the current time and for days/hours in the future. In doing so it enables planning and real-time decision-making to ensure GNSS continuity and reliability. Whereas Foresight Risk Analysis
Drone operators can combine this knowledge with data from GNSS Foresight to make decisions for the drone's safe BVLOS fl ight
Solution 2 The second solution relies on reliable test services for GNSS-reliant equipment. From GNSS chipsets to whole UAS, Spirent hardware and software solutions can test the equipment’s ability to navigate in areas of GPS degradation. Drone operators can combine this knowledge with data from GNSS Foresight to make intelligent decisions about where and when the drone can safely fly BVLOS. For more on safe autonomous drone
flight beyond visual line of sight, see Spirent Communications’s ebook “Achieving Reliable GNSS Performance for Autonomous UAS Navigation”.
Below: Image of downtown Indianapolis, US, in Spirent’s GNSS Foresight Visualisation Tool. All major constellations were used to create this heatmap. More open areas, such as parks and lower buildings, still have consistent GNSS coverage. Areas closer to dense urban centres, however, are much more prone to coverage issues
20 June 2022
www.electronicsworld.co.uk
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