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To address the challenges of localization drift and perception-planning coupling in unmanned aerial vehicles (UAVs) operating in open-top scenarios (e.g., collapsed buildings, roofless mazes), this paper proposes EAROL, a novel framework…

Robotics · Computer Science 2025-08-21 Xinkai Liang , Yigu Ge , Yangxi Shi , Haoyu Yang , Xu Cao , Hao Fang

Radio detection is now an established technique for the study of ultra-high-energy (UHE) cosmic rays with energies above $\sim10^{17}$ eV. The next-generation of radio experiments aims to extend this technique to the observation of UHE…

High Energy Astrophysical Phenomena · Physics 2025-05-14 Marion Guelfand , Valentin Decoene , Olivier Martineau-Huynh , Simon Prunet , Matías Tueros , Oscar Macias , Aurélien Benoit-Lévy

The detection of side-scattered ultraviolet light from spaceborne lasers with fluorescence telescopes of cosmic ray observatories offers unique opportunities for systematic studies of the aerosol content of the local atmosphere. It also…

Instrumentation and Methods for Astrophysics · Physics 2025-08-07 Michael Unger , Oliver Lux , Oliver Reitebuch

We present two estimators to quantify the angular power spectrum of the sky signal directly from the visibilities measured in radio interferometric observations. This is relevant for both the foregrounds and the cosmological 21-cm signal…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-11 Samir Choudhuri , Somnath Bharadwaj , Abhik Ghosh , SK. Saiyad Ali

The adaptive module of the 4.1-m SOAR telescope, SAM, corrects ground-layer turbulence using a UV laser guide star. It has been commissioned in 2013 and it is in regular science operation since 2014. SAM works with the CCD imager covering a…

Instrumentation and Methods for Astrophysics · Physics 2016-11-09 Andrei Tokovinin , Rolando Cantarutti , Roberto Tighe , Patricio Schurter , Manuel Martinez , Sandrine Thomas , Nicole van der Bliek

This paper presents a study of the atmospheric refraction and its effect on the light coupling efficiency in an instrument using single-mode optical fibers. We show the analytical approach which allowed us to assess the need to correct the…

In scanning probe microscopy laser interferometers are usually used for measuring the position of the probe tip with a metrological traceability. As the most of the AFM setups are designed to work under standard atmospheric conditions the…

Instrumentation and Detectors · Physics 2022-10-25 V. Hucl , M. Cizek , J. Hrabina , B. Mikel , S. Rerucha , Z. Buchta , P. Jedlicka , A. Lesundak , J. Oulehla , L. Mrna , M. Sarbort , R. Smid , J. Lazar , O. Cip

In a previous paper we presented the results of applying machine learning to classify whether an HI 21-cm absorption spectrum arises in a source intervening the sight-line to a more distant radio source or within the host of the radio…

Instrumentation and Methods for Astrophysics · Physics 2021-07-14 S. J. Curran

We present an automated procedure that derives simultaneously the effective temperature $T_{eff}$, the surface gravity logg, the metallicity [Fe/H], and the equatorial projected rotational velocity vsini for "normal" A and Am stars. The…

Instrumentation and Methods for Astrophysics · Physics 2016-04-20 M. Gebran , W. Farah , F. Paletou , R. Monier , V. Watson

A large distance propagation in turbulent atmosphere results in disintegration of laser beam into speckles. We find that the most intense speckle approximately preserves both the Gaussian shape and the diameter of the initial collimated…

Optics · Physics 2019-12-10 Pavel M. Lushnikov , Natalia Vladimirova

In recent years, Onboard Self Localization (OSL) methods based on cameras or Lidar have achieved many significant progresses. However, some issues such as estimation drift and feature-dependence still remain inherent limitations. On the…

Robotics · Computer Science 2020-10-26 Thien-Minh Nguyen , Shenghai Yuan , Muqing Cao , Yang Lyu , Thien Hoang Nguyen , Lihua Xie

We describe the results from a new instrument which combines Lucky Imaging and Adaptive Optics to give the first routine direct diffraction-limited imaging in the visible on a 5m telescope. With fast image selection behind the Palomar AO…

Traditional methods for optimizing light source emissions rely on a time-consuming trial-and-error approach. While in-situ optimization of light source gain media emission during growth is ideal, it has yet to be realized. In this work, we…

Mesoscale and Nanoscale Physics · Physics 2024-11-04 Chao Shen , Wenkang Zhan , Shujie Pan , Hongyue Hao , Ning Zhuo , Kaiyao Xin , Hui Cong , Chi Xu , Bo Xu , Tien Khee Ng , Siming Chen , Chunlai Xue , Fengqi Liu , Zhanguo Wang , Chao Zhao

Accurate and reliable sensor calibration is essential to fuse LiDAR and inertial measurements, which are usually available in robotic applications. In this paper, we propose a novel LiDAR-IMU calibration method within the continuous-time…

Robotics · Computer Science 2022-05-09 Jiajun Lv , Xingxing Zuo , Kewei Hu , Jinhong Xu , Guoquan Huang , Yong Liu

The Fast Aerosol Spectrometer (FASP) is a device for spectral aerosol measurements. Its purpose is to safely monitor the atmosphere inside a reactor containment. First we describe the FASP and explain its basic physical laws. Then we…

Numerical Analysis · Mathematics 2017-01-17 Tobias Kyrion , Graham Alldredge

In addition to the BLINC/MIRAC IR science instruments, the Magellan adaptive secondary AO system will have an EEV CCD47 that can be used both for visible AO science and as a wide-field acquisition camera. The effects of atmospheric…

Instrumentation and Methods for Astrophysics · Physics 2010-10-08 Derek Kopon , Laird M. Close , Victor Gasho

Existing oriented object detection methods commonly use metric AP$_{50}$ to measure the performance of the model. We argue that AP$_{50}$ is inherently unsuitable for oriented object detection due to its large tolerance in angle deviation.…

Computer Vision and Pattern Recognition · Computer Science 2024-04-09 Ying Zeng , Yushi Chen , Xue Yang , Qingyun Li , Junchi Yan

We present the results of mid-infrared nulling interferometric observations of the main-sequence star alpha Lyr (Vega) using the 6.5 m MMT with its adaptive secondary mirror. From the observations at 10.6 microns, we find that there is no…

We provide a technique for resolving intermediate-separation binaries stars with medium-sized telescopes (i.e. diameter less than or equal to 2.5 m) at wavelengths around 825 nm in the super-resolution range (i.e. below the limit defined by…

Instrumentation and Methods for Astrophysics · Physics 2025-01-10 Miguel A. Cagigas , R. Clavero , Manuel P. Cagigal , David Nespral , A. A. Djupvik , D. Jones , Pedro J. Valle , Vidal F. Canales , E. Soria , R. López , O. Zamora , A. Oscoz , J. Marco

Accurate environmental perception is critical for advanced driver assistance systems (ADAS). Light detection and ranging (LiDAR) systems play a crucial role in ADAS; they can reliably detect obstacles and help ensure traffic safety.…

Robotics · Computer Science 2025-02-25 Federico Scarì , Nitin Jonathan Myers , Chen Quan , Arkady Zgonnikov
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