Results 11 to 20 of about 41,435 (217)

Locating the North Celestial Pole From Skylight Polarization Patterns and Solar Declination

IEEE Transactions on Instrumentation and Measurement
Global navigation satellite systems (GNSS) provide robust and accurate navigation information. However, GNSS can be spoofed, potentially leading to dramatic errors in localization estimation. Inspired by nature, research has been undertaken into skylight polarization as a reliable alternative to the existing navigation systems. Recent studies have used
Kronland-Martinet, Thomas, Poughon, Léo, Moutenet, Antoine, Pasquinelli, Marcel, Duché, David, Serres, Julien, Viollet, Stéphane   +6 more
openaire   +3 more sources

Heading choices of flying Drosophila under changing angles of polarized light. [PDF]

Sci Rep, 2019
Many navigating insects include the celestial polarization pattern as an additional visual cue to orient their travels. Spontaneous orientation responses of both walking and flying fruit flies (Drosophila melanogaster) to linearly polarized light have ...
Mathejczyk TF, Wernet MF.
europepmc   +3 more sources

Imprecision in Vision: Lessons From Neural Circuits in the Fly. [PDF]

Bioessays
Visual systems are considered regular, retinotopic structures. Here, we summarize findings, including evidence from recent connectomes, that demonstrate cellular and synaptic heterogeneity in the Drosophila visual system —from regional specialization and stochastic photoreceptor patterns to heterogeneous synaptic connectivity.
Wernet MF, Silies M.
europepmc   +2 more sources

OPTICAL POLARIZED EFFECTS FOR QUANTITATIVE REMOTE SENSING [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
Polarization is one of the four basic physical properties of solar radiation. After the solar radiation reaches the surface of these media, it reflects, scatters or refracts, and exhibits different degrees of polarization.
L. Yan, Y. Li, H. Mortimer, R. Zhang, J. Peltoniemi, X. Liu, F. Zhang   +6 more
doaj   +1 more source

CONSTRUCTION AND TEST OF BIO-INSPIRED IMAGING POLARIZATION NAVIGATION PROTOTYPE [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
Bio-inspired polarization navigation is a promising navigation method inspired by insects’ autonomous foraging and homing behaviour. Many insects acquire their spatial orientation by sensing the polarization pattern of the skylight.
H. Lu, Y. Xie, K. Zhang, H. Zhang, X. M. Zou, J. Wang, K. C. Zhao   +6 more
doaj   +1 more source

Skylight Polarization Patterns and Animal Orientation [PDF]

Journal of Experimental Biology, 1982
ABSTRACT Although many invertebrate animals orient by means of ultraviolet sky-light polarization patterns, existing measurements of these patterns are inadequate for full analysis of the biologically relevant information available from the sky.
Michael L. Brines, James L. Gould
openaire   +1 more source

Temporal and Spatial Characteristics of the Global Skylight Polarization Vector Field

Remote Sensing, 2022
There are two widely recognized global fields in nature: the gravity field and the geomagnetic field. Universal gravitation and Earth rotation are important sources of the Earth’s gravity and geomagnetic fields, which are well known to us. After years of
Lei Yan, Yanfei Li, Wei Chen, Yi Lin, Feizhou Zhang, Taixia Wu, Jouni Peltoniemi, Hongying Zhao, Siyuan Liu, Zihan Zhang   +9 more
doaj   +1 more source

Neutral point detection using the AOP of polarized skylight patterns

Optics Express, 2021
The neutral points are one of the most significant characteristics of the polarized skylight pattern in the whole sky. At present, detection of the neutral points mostly utilizes ellipse fitting of the degree of polarization. However, because the degree of polarization distribution characteristics of a polarized skylight pattern is easily affected by ...
Zhiguo Fan, Xianqiu Wang, Haihong Jin, Cheng Wang, Ni Pan, Dou Hua   +5 more
openaire   +2 more sources

Preparation of an Integrated Polarization Navigation Sensor via a Nanoimprint Photolithography Process

Photonics, 2022
Based on the navigation strategy of insects utilizing the polarized skylight, an integrated polarization sensor for autonomous navigation is presented. The polarization sensor is fabricated using the proposed nanoimprint photolithography (NIPL) process ...
Ze Liu, Jinkui Chu, Ran Zhang, Chuanlong Guan, Yuanyi Fan   +4 more
doaj   +1 more source

Multimodal interactions in insect navigation [PDF]

, 2020
Animals travelling through the world receive input from multiple sensory modalities that could be important for the guidance of their journeys. Given the availability of a rich array of cues, from idiothetic information to input from sky compasses and ...
Buehlmann, Cornelia, Graham, Paul, Mangan, Michael   +2 more
core   +2 more sources