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Intelligent reflecting surface (IRS) that enables the control of the wireless propagation environment has been looked upon as a promising technology for boosting the spectrum and energy efficiency in future wireless communication systems.…

Signal Processing · Electrical Eng. & Systems 2020-02-26 Samith Abeywickrama , Rui Zhang , Chau Yuen

Intelligent reflecting surface (IRS) has emerged as a revolutionizing solution to enhance wireless communications by intelligently changing the propagation environment. Prior studies on IRS are based on an ideal reflection model with a…

Signal Processing · Electrical Eng. & Systems 2020-06-03 Wenhao Cai , Hongyu Li , Ming Li , Qian Liu

Diagnostic potential of the spectral signatures of Raman scattering imprinted in planetary albedo spectra at short optical wavelengths has been demonstrated in research on Solar System planets and has recently been proposed as a probe of…

Earth and Planetary Astrophysics · Physics 2017-09-13 Antonija Oklopčić , Christopher M. Hirata , Kevin Heng

The dynamics of Mars' obliquity are believed to be chaotic, and the historical ~3.5 Gyr (late-Hesperian onward) obliquity probability density function (PDF) is high uncertain and cannot be inferred from direct simulation alone. Obliquity is…

Earth and Planetary Astrophysics · Physics 2019-04-19 Samuel J. Holo , Edwin S. Kite , Stuart J. Robbins

This work investigates a hybrid photovoltaic-wind-battery power system designed to sustain a Mars base under varying seasonal and climatic conditions. The Mars Climate Database was utilized to simulate the effects of seasonal changes,…

Instrumentation and Methods for Astrophysics · Physics 2024-12-30 Abdollah Masoud Darya , Ramesh C. Bansal , Omaima Anwar Jarndal

The Radiation Assessment Detector (RAD), onboard the Mars Science Laboratory (MSL) rover Curiosity, has been measuring the energetic charged and neutral particles and the radiation dose rate on the surface of Mars since the landing of the…

It has been posited that lunar eclipse observations may help predict the in-transit signature of Earth-like extrasolar planets. However, a comparative analysis of the two phenomena addressing in detail the transport of stellar light through…

Solar and Stellar Astrophysics · Physics 2015-06-05 A. García Muñoz , M. R. Zapatero Osorio , R. Barrena , P. Montañés-Rodríguez , E. L. Martín , E. Pallé

This paper presents an application of artificial intelligence on mass spectrometry data for detecting habitability potential of ancient Mars. Although data was collected for planet Mars the same approach can be replicated for any…

Earth and Planetary Astrophysics · Physics 2023-10-19 Ioannis Nasios

The ever-changing transparency of the Martian atmosphere hinders the determination of absolute surface colour from spacecraft images. While individual high-resolution images from low orbit reveal numerous colour details of the geology, the…

Earth and Planetary Astrophysics · Physics 2024-10-29 G. G. Michael , D. Tirsch , K. -D. Matz , W. Zuschneid , E. Hauber , K. Gwinner , S. Walter , R. Jaumann , T. Roatsch , F. Postberg , J. Liu

We present a new implementation of the hydrological cycle scheme into a general circulation model of the Martian atmosphere. The model includes a semi-Lagrangian transport scheme for water vapor and ice, and accounts for microphysics of…

Earth and Planetary Astrophysics · Physics 2022-01-14 Dmitry S. Shaposhnikov , Alexander V. Rodin , Alexander S. Medvedev , Anna A. Fedorova , Takeshi Kurod , Paul Hartogh

The atmospheres of (exo) planets and moons, as well as reflection nebulae, contain in general independently scattering particles in random orientation and are often supposed to be plane-parallel. Relations are presented for the…

Astrophysics · Physics 2008-09-23 J. W. Hovenier D. M. Stam

Intelligent reflecting surface (IRS) is envisioned as a revolutionary technology for future wireless communication systems since it can intelligently change radio environment and integrate it into wireless communication optimization.…

Signal Processing · Electrical Eng. & Systems 2021-01-05 Hongyu Li , Wenhao Cai , Yang Liu , Ming Li , Qian Liu , Qingqing Wu

By measuring the regular oscillations of the density of CO$_{2}$ in the upper atmosphere (between 120 and 190~km), the mass spectrometer MAVEN/NGIMS (Atmosphere and Volatile EvolutioN/Neutral Gas Ion Mass Spectrometer) reveals the local…

Earth and Planetary Astrophysics · Physics 2019-09-24 M. Vals , A. Spiga , F. Forget , E. Millour , L. Montabone , F. Lott

The Earth's albedo is a fundamental climate parameter for understanding the radiation budget of the atmosphere. It has been traditionally measured from space platforms, but also from the ground for sixteen years from Big Bear Solar…

Reducing atmospheres have recently emerged as a promising scenario to warm the surface of early Mars enough to drive the formation of valley networks and other ancient aqueous features that have been detected so far on the surface of Mars.…

Earth and Planetary Astrophysics · Physics 2020-04-09 Martin Turbet , Christian Boulet , Tijs Karman

Random surface deviations in a reflector antenna reduce the aperture efficiency. This communication presents a method for estimating the mean surface deviation of a parabolic reflector from a set of measured points. The proposed method…

Instrumentation and Methods for Astrophysics · Physics 2010-07-28 Nicolás A. Casco

The Kepler mission has provided a wealth of data, revealing new insights in time-domain astronomy. However, Kepler's single band-pass has limited studies to a single wavelength. In this work we build a data-driven, pixel-level model for the…

Instrumentation and Methods for Astrophysics · Physics 2021-02-02 Christina Hedges , Rodrigo Luger , Jessie Dotson , Daniel Foreman-Mackey , Geert Barentsen

The passive retroreflector arrays placed on the moon by Apollo 11, 14 and 15 astronauts continue to produce valuable Earth-Moon range measurements that enable high-precision tests of gravitational physics, as well as studies of geo- and…

Instrumentation and Methods for Astrophysics · Physics 2024-05-20 Sanchit Sabhlok , James B. R. Battat , Nicholas R. Colmenares , Daniel P. Gonzales , Thomas W. Murphy

Abridged: Debris disks are valuable systems to study dust properties. Because they are optically thin at all wavelengths, we have direct access to the properties of dust grains. One very promising technique to study them is to measure their…

Solar and Stellar Astrophysics · Physics 2020-08-05 J. Olofsson , J. Milli , A. Bayo , Th. Henning , N. Engler