| Zugriffsnummer | 43676 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Employing UAS to perform low altitude navaids measurements |
| Autor(in); Institution |
Schrader, Thorsten; 2.2, Hochfrequenz und Felder, PTB-Braunschweig
Bredemeyer, Jochen; FCS Flight Calibration Services GmbH, Braunschweig, GERMANY
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| Quelle/Jahr | International Flight Inspection Symposium 2018 - Proceedings:(2018) |
| URL | |
| Konferenzangaben | 20th International Flight Inspection Symposium, Monterey, Calif., 16-20, April, 2018, USA |
| Zusammenfassung | An unmanned aerial system (UAS)-based measurement system to supplement or replace ground inspection of ILS (LOC, GP) and (D)VOR is described. This platform allows quasi-stationary hovering not only in areas normally accessed with mast-equipped vehicles for ILS ground inspections, but also in critical areas accessible only with a flying platform. Thecalibrated and operationally robust UAS is an ideal tool for setting up system and antennas of new installations, thus accelerating the commissioning of ILS Localizers and Glideslopes prior to certification by flight inspection. Measurements are now alsopossible in locations where it is not practical or safe to measure with a conventional flight inspection system, e.g. to generate measurement data for electromagnetic simulations.Aconventional multicopteris used as a carrier UAS. Dedicated antennas were designed to respond to both electromagnetic and mechanical requirements for the respective wavelengths of 3m (LOC,VOR) and 1m (GP). The UAS featuresa light-weight dedicated dual ILS LOC/GP (VOR, GBAS) receiver and recorder payload based on a miniaturized, FPGA-controlled system handlinglarge bandwidth data streams in real-time. All components, i.e. antennas, RF and signal processing hard-and firmware were specially designed to meet the application’s requirements.A particular challenge isto separate the desiredILS/VOR signal-in-space from near field effects generated by the UAS itself. Effects that must be carefully removed from the incoming ADC-sampled signal is e.g. propeller induced amplitude modulation, or the short-term dynamics of aflying UAS. In contrast to conventional ILS receiver technology, the raw channel bandpass signal-in-space covering the complete channel bandwidthis sampled and directly recorded at a high data rate. Signal postprocessing then extractsall essential parameters of interest. Responding to a main user requirement, essential ILS /VOR parameters are down-linked in real-time. Thiswas implemented throughcombined hardware and software signal processing. A radio link is connected to atablet PC on the ground for sensor control and the display of relevant signal parameters.The paper describes the experience gained with the system, and provides recent measurement results obtained from ILS Localizer/Glidepath and VOR installations. |
| Themenbereich der Metrologie | Elektrizität und Magnetismus |
| Forschungsprojekt | WERAN |