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We report on an air-spaced virtually imaged phased array (VIPA) spectrometer that resolves the modes of a mid-infrared frequency comb with a repetition rate of 250 MHz, without an optical filter cavity. With a record spectral resolution of…

光学 · 物理学 2026-04-02 Ibrahim Sadiek , Norbert Lang , Jean-Pierre H. van Helden

An innovative and novel quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor for highly sensitive and selective breath gas analysis is introduced. The QEPAS sensor consists of two acoustically coupled micro-resonators (mR) with an…

仪器与探测器 · 物理学 2017-04-28 Jan C. Petersen , Laurent Lamard , Yuyang Feng , J-F. Focant , Andre peremans , Mikael Lassen

Object detection is one of the main applications of computer vision in remote sensing imagery. Despite its increasing availability, the sheer volume of remote sensing data poses a challenge when detecting rare objects across large…

计算机视觉与模式识别 · 计算机科学 2025-07-25 Adhemar de Senneville , Xavier Bou , Thibaud Ehret , Rafael Grompone , Jean Louis Bonne , Nicolas Dumelie , Thomas Lauvaux , Gabriele Facciolo

Atmospheric correction is a fundamental task in remote sensing because observations are taken either of the atmosphere or looking through the atmosphere. Atmospheric correction errors can significantly alter the spectral signature of the…

图像与视频处理 · 电气工程与系统科学 2022-03-23 Fangcao Xu , Jian Sun , Guido Cervone , Mark Salvador

We present observations of massive star-forming regions selected from the IRAS Point Source Catalog. The observations were made with the Very Large Array and the Large Millimeter Telescope to search for Class I methanol masers. We made…

We present a method to optimize absorption cells for precise wavelength calibration in the near-infrared. We apply it to design and optimize methane isotopologue cells for precision radial velocity measurements in the K band. We also…

Distributed energy resources are better for the environment but may cause transformer overload in distribution grids, calling for recovering meter-transformer mapping to provide situational awareness, i.e., the transformer loading. The…

最优化与控制 · 数学 2022-05-23 Bilal Saleem , Yang Weng

Mirror detection aims to identify the mirror regions in the given input image. Existing works mainly focus on integrating the semantic features and structural features to mine specific relations between mirror and non-mirror regions, or…

计算机视觉与模式识别 · 计算机科学 2022-09-07 Tianyu Huang , Bowen Dong , Jiaying Lin , Xiaohui Liu , Rynson W. H. Lau , Wangmeng Zuo

We demonstrate a robust and miniaturized fiber Fabry-Perot cavity-based sensor for photothermal spectroscopic signal retrieval. The proof-of-concept experiment involved the use of a near-infrared pump laser to detect methane molecules on an…

A trace gas sensor, based on quartz-enhanced photoacoustic spectroscopy (QEPAS), consisting of two acoustically coupled micro-resonators (mR) with an off-axis 20 kHz quartz tuning fork (QTF) is demonstrated. The complete acoustically…

仪器与探测器 · 物理学 2016-10-03 Mikael Lassen , Laurent Lamard , Yuyang Feng , Andre peremans , Jan C. Petersen

Context. Solid methane (CH$_4$) is an important molecule in interstellar and planetary environments, serving as a precursor to complex organic compounds, and it is a potential biosignature in exoplanetary studies. Despite its significance,…

太阳与恒星天体物理 · 物理学 2026-03-18 Varvara Karteyeva , Ruslan Nakibov , Igor Petrashkevich , Mikhail Medvedev , Anton Vasyunin

The HST/NICMOS transmission spectrum measurements of HD 189733b that suggest the detection of methane (CH$_{4}$) in an exoplanet atmosphere have been a source of significant controversy. With what is probably the best analyzed exoplanet…

地球与行星天体物理 · 物理学 2015-06-18 Mark Swain , Michael Line , Pieter Deroo

Optical frequency-comb-based-high-resolution spectrometers offer enormous potential for spectroscopic applications. Although various implementations have been demonstrated, the lack of suitable mid-infrared comb sources has impeded…

We have detected emission from both the 4_{-1}-3_{0} E (36.2~GHz) class I and 7_{-2}-8_{-1} E (37.7~GHz) class II methanol transitions towards the centre of the closest ultra-luminous infrared galaxy Arp 220. The emission in both the…

星系天体物理 · 物理学 2015-06-23 Xi Chen , Simon P. Ellingsen , Willem A. Baan , Hai-Hua Qiao , Juan Li , Tao An , Shari L. Breen

In this white paper, we present the MegaMapper concept. The MegaMapper is a proposed ground-based experiment to measure Inflation parameters and Dark Energy from galaxy redshifts at $2<z<5$. In order to achieve path-breaking results with a…

天体物理仪器与方法 · 物理学 2022-09-12 David J. Schlegel , Juna A. Kollmeier , Greg Aldering , Stephen Bailey , Charles Baltay , Christopher Bebek , Segev BenZvi , Robert Besuner , Guillermo Blanc , Adam S. Bolton , Ana Bonaca , Mohamed Bouri , David Brooks , Elizabeth Buckley-Geer , Zheng Cai , Jeffrey Crane , Regina Demina , Joseph DeRose , Arjun Dey , Peter Doel , Xiaohui Fan , Simone Ferraro , Douglas Finkbeiner , Andreu Font-Ribera , Satya Gontcho A Gontcho , Daniel Green , Gaston Gutierrez , Julien Guy , Henry Heetderks , Dragan Huterer , Leopoldo Infante , Patrick Jelinsky , Dionysios Karagiannis , Stephen M. Kent , Alex G. Kim , Jean-Paul Kneib , Anthony Kremin , Luzius Kronig , Nick Konidaris , Ofer Lahav , Michael L. Lampton , Martin Landriau , Dustin Lang , Alexie Leauthaud , Michael E. Levi , Michele Liguori , Eric V. Linder , Christophe Magneville , Paul Martini , Mario Mateo , Patrick McDonald , Christopher J. Miller , John Moustakas , Adam D. Myers , John Mulchaey , Jeffrey A. Newman , Peter E. Nugent , Nikhil Padmanabhan , Nathalie Palanque-Delabrouille , Antonella Palmese Anthony L. Piro , Claire Poppett , Jason X. Prochaska , Anthony R. Pullen , David Rabinowitz , Anand Raichoor , Solange Ramirez , Hans-Walter Rix , Ashley J. Ross , Lado Samushia , Emmanuel Schaan , Michael Schubnell , Uros Seljak , Hee-Jong Seo , Stephen A. Shectman , Edward F. Schlafly , Joseph Silber , Joshua D. Simon , Zachary Slepian , Anže Slosar , Marcelle Soares-Santos , Greg Tarlé , Ian Thompson , Monica Valluri , Risa H. Wechsler , Martin White , Michael J. Wilson , Christophe Yèche , Dennis Zaritsky , Rongpu Zhou

Matched filter (MF) techniques have been widely used for retrieval of greenhouse gas enhancements (enh.) from imaging spectroscopy datasets. While multiple algorithmic techniques and refinements have been proposed, the greenhouse gas target…

We present a radiative transfer analysis of latitudinally resolved H (1.487-1.783 micron) and K (2.028-2.364 micron) band spectra of Uranus, from which we infer the distributions of aerosols and methane in the planet's atmosphere. Data were…

地球与行星天体物理 · 物理学 2018-06-06 Michael T. Roman , Don Banfield , Peter J. Gierasch

State-of-the-art molecular databases and realistic global atmospheric models allow to predict accurate atmospheric transmittance spectra. The TAPAS online service provides atmospheric transmittance spectra of the most important species as…

天体物理仪器与方法 · 物理学 2025-09-17 R. Lallement , J. L. Bertaux , S. Ferron , C. Boonne , E. Richard , F. Lefèvre , J. V. Smoker

Remote sensing scene classification plays a key role in Earth observation by enabling the automatic identification of land use and land cover (LULC) patterns from aerial and satellite imagery. Despite recent progress with convolutional…

计算机视觉与模式识别 · 计算机科学 2025-12-09 Mohammed Q. Alkhatib , Ali Jamali , Swalpa Kumar Roy

Multi-modal Probabilistic Active Sensing (MMPAS) uses sensor fusion and probabilistic models to control the perception process of robotic sensing platforms. MMPAS is successfully employed in environmental exploration, collaborative mobile…

机器人学 · 计算机科学 2021-03-30 Luca Varotto , Angelo Cenedese