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72 Show report | Commercial UAV Expo 2019 navigation and collision avoidance, with FHSS data links and AES-256 encryption to enable consistent and secure comms throughout the swarm. FoxFury Lighting Solutions unveiled its newest UAV lighting system, the D3060, a 37 g system for small-to- medium sized UASs. “The D3060 system actually holds two 200 lumen lights: one dorsal light with a 60 º beam and one front light with a 30 º beam,” said Tracey Willmott. “Both lights have low power, high power and strobe modes, and the strobe complies with FAA and international regulations for night flight and anti-collision lighting. “Also, we’ve partnered with Autel Robotics to make a ‘saddle’ strapping system for attaching and removing the system from the Autel Evo airframe without needing tools.” The D3060 is supplied with the Autel Evo quadcopter, but is also sold individually through FoxFury. It also comes with 3M dual-lock fasteners to attach it to other UAVs such as the Parrot Anafi and DJI Mavic. “With the saddle, the D3060 can be removed and reinstalled around a UAV wherever needed, and it can also be manually rotated to the preferred angle with the 360 º base plate,” Willmott added. The system contains a lithium-polymer battery, which lasts for 1.5 to 3 hours, and is rechargeable via USB-C. Trimble unveiled its new UAS1 compact GNSS board, which is designed to be optimised for the SWaP and I/O requirements of unmanned aircraft. “Feedback from various regions around the world and a UAV manufacturer enables us to determine the requirements for a UAS-specific GNSS module,” said Ed Norse. “Based on those requirements we designed and developed a module around ease of installation and functionality, and which consumes about 2.2-2.5 W at a 13.5 V DC input.” The UAS1 board weighs 45 g, measures 71 x 46 x 13 mm and operates on DC supplies of 7-60 V. With 336 tracking channels, the system can take L1 and L2 signals from GPS, GLONASS, BeiDou and Galileo satellites, as well as SBAS, QZSS, OmniSTAR and Trimble RTX services. The enclosure features a 26-pin Harwin Gecko latched connector with interfaces for USB 2.0, RS-232, CAN and several others, as well as an MMCX male receptacle for a GNSS antenna. The board has also been designed to direct heat away from the GNSS module and towards the four mounting holes so that it can be dissipated into the hull or heat sinks. “As heat can be a concern in small, unventilated and confined spaces, we designed the UAS1 to manage its heat, which is produced mainly by the shielded GNSS module, by providing a ‘path of least resistance’ for the heat to flow away from the unit’s shield and out to the mounting holes,” Trimble’s Dian Mangalapallil said. “When the UAS1 is mounted on an airframe, for example, the airframe acts as a heatsink to dissipate the heat from the GNSS module into it, thereby keeping the UAS1 below its maximum temperature threshold. We have also added an internal temperature sensor that allows the operator to monitor its temperature during operation.” Horizontal velocity readings are accurate to 0.007 m/s, vertical velocity to 0.02 m/s, and position is accurate to 1 cm with RTK processing. Integrity is tracked and sustained using embedded software for fault detection and exclusion (FDE) and receiver autonomous integrity monitoring (RAIM). Mangalapallil said, “This means that when more measurements than unknowns are available, the receiver can detect measurements that do not fit into the positioning solution. Newly tracked satellites that fail this test are put through more tests before they are included, while existing satellites are immediately removed from the solution. FDE and RAIM are also calculated between GNSS constellations, with complete systems being rejected if necessary.” February/March 2020 | Unmanned Systems Technology FoxFury’s D3060 UAV lighting system The Trimble UAS1 GNSS board