Unmanned Systems Technology 015 | Martin UAV V-Bat | William Sachiti | Sonar Systems | USVs | Desert Aircraft DA150 EFI | SeaCat AUV/ROV | Gimbals

80 Show report | Commercial UAV Expo Europe 2017 it’s implemented in our own silicon and is protected by 21 patents.” Amimon’s technique revolves around Joint Source Channel Coding (JSCC). As video components and their bit representation are not equally important, JSCC uses unequal error protection, prioritising what is noticeable to the human eye. By contrast, traditional systems such as H.264 and H.265 compression provide equal protection to all bits (including those irrelevant to human eyesight, potentially wasting channel resources), using buffering and thus creating latency to ensure retransmission of data when the bit error rate exceeds a certain level. “With some elements of machine learning, in the event of a change in channel capacity our algorithm only drops information that humans would not have noticed anyway, giving us the capability not to keep buffers and retransmit information,” Dagan added. Amimon seeks collaboration with OEMs developing advanced UxV products needing real-time wireless video transmission for remote machine vision and operation. Applanix, a Trimble company, released a new high-accuracy post- processing mode in POSPac MMS 8. This new mode is called PP-RTX, and it enables users to obtain centimetre-level positioning in mobile mapping without the use of traditional local base stations or a VRS network by using precise data from the real-time Trimble CenterPoint RTX service. “We also have a new bundled solution consisting of our APX-15 UAV GNSS- inertial board and the UASMaster INPHO photogrammetric software,” said Jesus Ruiz. UASMaster supports directly geo- referenced data collected using the APX-15 UAV, and can be used to perform airborne geometric camera calibration, quality assurance and control as well as boresight parameter estimation. Trimble CenterPoint RTX uses a global deployment of about 100 GNSS receivers that track GPS, GLONASS, BDS, QZSS and Galileo signals to provide GNSS positioning worldwide. By combining real-time data from a global reference network with innovative positioning and compression algorithms, high accuracy can be achieved. The data from the stations is transmitted to centres with built-in redundancy, and the centres themselves contain redundant comms and processing servers that continuously monitor the health of the reference stations around the world and automatically reconfigure the network if any problems are detected. The RTX server provides precise satellite orbits, clocks and phase biases plus global and/or regional ionospheric corrections, with final positional accuracies of 2-5 cm. A-techSYN was showing its PilotUS autopilot system, which is designed as a cost-effective alternative to more expensive military-grade UAV navigation systems. Originally designed as a generic multipurpose autopilot, the system uses COTS processors and electronics to fly fixed-wing UASs, multicopter UASs and even helicopter UASs.  Gökhan Celik said, “To rely on non- military grade components while still providing comparable accuracy, we had to develop highly proficient software to optimise the data readings coming in from the sensors and avoid any noticeable gap in reliability emerging between our system and one using military hardware. “We developed software to identify, for example, inconsistencies between IMU data, GPS data and airspeed data, and then the UAV enacts a back-up measure after recognising which system is failing. We still provide at least 80% of the reliability though of a highly expensive military system that may cost four times as much.” In addition, the PilotUS has dual August/September 2017 | Unmanned Systems Technology UASMaster photogrammetric software from Applanix supports geo-referenced data The CGT45-SLT UAV from A-techSYN launches vertically then transitions to fixed-wing flight