References: [1] https://www.u-blox.com/en/product/c94-m8p#tabdocumentation-resources [2] Ohtomo, Fumio., Osaragi, Kazuki., Anai, Tetsuji., Otani, Hitoshi. (2011). US Grant Patent number US20120277934A1, aking-Off And Landing Target Instrument And Automatic Taking-Off And Landing System. [3] Sun, Jingxuan., Li, Boyang., Jiang, Yifan., Wen, Chih-yung. (2016). A Camera-Based Target Detection and Positioning UAV System for Search and Rescue (SAR) Purposes, Sensors 2016, 16, 1778; doi:10.3390/s16111778. [4] Andreev, K., Stanchev, G. (2019). Flight Safety Sensor and Auto-Landing System of Unmanned Aerial System, Int. J. of Reasoning-based Intelligent Systems (IJRIS), Japan. [5] Arnaudov, R., Stanchev, G., Andreev, K. (2019). System for automatically targeting of unmanned aerial vehicle with vertical landing on mobile landing site, In: 54th International Scient. Conference on Information, Communication and Energy Systems and Technologies, Ohrid, Republic of North Macedonia, June 27-29. [6] Souza, A. L. G., Ishihara, J. Y., Ferreira, H. C., Borges, R. A., Borges, G. A. (2016). Antenna pointing system for satellite tracking based on Kalman filtering and model predictive control techniques, Advances in Space Research, 58, p. 2328–2340 [7] Official U.S. government information about the Global Positioning System (GPS) and related topics, https://www.gps.gov/systems/gps/performance/accuracy/ [8] EASA Navipedia, https://gssc.esa.int/navipedia/index.php/Galileo_General_Introduction |