SEAMLESS NAVIGATION IN GPS-DENIED ENVIRONMENT USING LIRHOT’S REAL TIME NORTH FINDING SENSOR

Shlomi Voro 1, Itamar Lavidor 2

1Lirhot Systems Ltd Rehovot Israel

2Lirhot Systems Ltd Rehovot Israel

DOI: 10.1515/aon-2019-0009

ABSTRACT

This paper presents a new type of north finding sensor. The passive optical sensor captures images of the sky at a high frame rate and analyzes them into a polarized map of the sky with a high degree of accuracy. The sensor operates in real time, under various weather and atmospheric conditions. The sensor output shows high heading accuracy relative to the celestial true north. Based upon the NAS-14V2 astronomical method of navigation, it is possible to define the sensor global position on earth.

KEYWORDS

North finding; automated astro-navigation; automated stellar navigation systems; Sky polarization; imaging sensor; navigation by natural network; autonomous passive sextant

REFERENCES

[1] S. Vorovitchik,“Apparatus and method for navigation”, US patent number US20120175496A1, 2009-09-22
[2] Roy Malkin “Understanding the Accuracy of Astro Navigation”, Navigation Instructor, Navigation Training Unit HMS Collingwood, THE JOURNAL OF NAVIGATION (2014),67,63–81
[3] C. Frohlich and Glenn E. Shaw “New determination of Rayleigh scattering in the terrestrial atmosphere” in Applied Optics 19(11):1773-5 · June 1980 with 36
[4] K. J. Voss and Y. Liu, “Polarized radiance distribution measurements of skylight. I. System description and characterization,” Appl. Opt. 36(24), 6083–6094 (1997).
[5] Huijie Zhao and Wujian Xu ” A Bionic Polarization Navigation Sensor and Its Calibration Method” MDPI Sensors, 3 August 2016
[6] Miyazaki, M. Ammar, R. Kawakami, and I. Katsushi, “Estimating sunlight polarization using a fish-eye lens,” IPSJ Trans. Computer Vis. Appl. 1, 288–300 (2009).
[7] Y. Wang, J. Chu, R. Zhang, L. Wang, and Z. Wang, “A novel autonomous real-time position method based on polarized light and geoma gnetic field,” Sci. Rep. 5, 9725 (2015).