Aerospace, Military & Defence 2020 Farnell Powerbanks_V3_130x103mm qtr template 11/03/2020 09:03 Page 1
Screen of Spirent’s GNSS Foresight Visualisation Tool in downtown Detroit, Michigan. In dense urban areas, signals are severely disrupted by surroundings. The bottom bar of the GNSS Foresight visualization tool represents the timeline for a certain point and shows that even the most degraded areas of signal have times of the day when performance is reliable.
GPS reliability could be a deal- breaker for UAS-based business models
For businesses investing in drone operations, this is a big deal. If a drone has to land unexpectedly during the flight, the costs of recovery and mission failure could become punitive. If it can’t even begin the flight without certainty around GPS signal availability, it calls into question the viability of the entire business model. All of this means a solution is needed to address the issue of GPS signal degradation. Without one, regulators may not be convinced that a drone can operate safely in certain areas, businesses may find it tough to gain approval to fly in those areas, and operations that do obtain authorisation for BVLOS flight may be disrupted if GPS issues occur.
Spirent offers a two-fold solution to the issue of GPS signal degradation
So how can drone operators ensure they have reliable GPS anywhere they might want or need to fly? As a leading global provider of GNSS test, measurement and assurance solutions, Spirent has been working closely with the aviation industry to develop a two-fold solution.
Solution 1: GNSS availability forecasting solutions
Spirent GNSS Foresight uses advanced 3D modelling and ray-tracing to predict and map areas where GNSS signals are likely to be degraded, and at which times of
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day. Drone operators can use Foresight before and during a 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 1-100 metres above ground level, for the current time and days/hours in the future. In doing so it enables planning and real-time decision-making to ensure GNSS continuity and reliability. Foresight Risk Analysis, meanwhile, provides best-case, worst-case, and 90th percentile predictions over a given service area to determine where GPS can always be assured.
Solution 2: Test solutions 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 Spirent GNSS Foresight to make intelligent decisions about where and when the drone can safely fly BVLOS.
For more on how Spirent is helping to enable safe autonomous drone flight beyond visual line of sight, see our ebook Achieving Reliable GNSS Performance for Autonomous UAS Navigation at:
www.spirent.com/assets/ebook-achieving- reliable-gnss-performance-for-autonomous- uas-navigation
www.spirent.com/assets/ebook-achieving- reliable-gnss-performance-for-autonomous- uas-navigation
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