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Autonomous navigation requires robust strategies, particularly in GPS-denied environments. The measurement and processing of polarized skylight patterns holds significant potential for geolocation and North estimation. An open source and easily upgradable simulator, named OpenSky, has been developed to simulate the measurement of sky polarization properties—namely, light intensity, angle of polarization, and degree of linear polarization—as observed through a polarimetric camera. OpenSky is available through open repositories such as GitHub and the Open Science Framework. The simulator is structured into five modular blocks, each of which can be independently improved, replaced, or extended. These blocks simulate, respectively, sky polarization properties, skylight intensity, optical conjugation, polarizing filters, and sensor behavior. The high fidelity of OpenSky has been validated through comparisons between simulated camera outputs and experimental raw images. From these images, the angle and degree of polarization were extracted via image processing techniques. This tool offers valuable support for the development of novel celestial-based sensors and for assessing their relevance to various scientific communities, whether in fundamental or applied research. Additionally, OpenSky has strong potential as a platform for training and validating deep neural networks. One of its major advantages lies in its capacity to generate diverse sky conditions at different locations across the globe—conditions that are often challenging and costly to reproduce in real-world settings.

[1]Notes and references

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OpenSky: a modular and open-source simulator of sky polarization measurements

  • HAL Id : hal-04520460 , version 1
  • DOI : 10.1109/TIM.2024.3374965
  • Antoine Moutenet, Léo Poughon, Bruno Toulon, Julien Serres, Stéphane Viollet. OpenSky: a modular and open-source simulator of sky polarization measurements. IEEE Transactions on Instrumentation and Measurement, 2024, pp.1-1. ⟨10.1109/TIM.2024.3374965⟩. ⟨hal-04520460⟩

References

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  1. ^ Moutenet, Antoine; Poughon, Léo; Toulon, Bruno; Serres, Julien; Viollet, Stéphane (2024-03). "OpenSky: a modular and open-source simulator of sky polarization measurements". IEEE Transactions on Instrumentation and Measurement: 1–1. doi:10.1109/TIM.2024.3374965. {{cite journal}}: Check date values in: |date= (help)