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Your search keyword '"Haynes, Mark S."' showing total 19 results
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19 results on '"Haynes, Mark S."'

2. HF Bistatic Radar Experiments with HAARP, UNM-LWA and OVRO-LWA for Planetary and Near-Earth Asteroid Science

Author

Haynes, Mark S., primary, Bernhardt, Paul A., additional, Benner, Lance A. M., additional, Matthews, Jessica, additional, McCarrick, Mike, additional, Reeve, Whitham D., additional, Callis, Evans, additional, Coon, Tracy, additional, Dowell, Jayce, additional, Taylor, Greg. B., additional, Elachi, Charles, additional, Hallinan, Gregg, additional, Davis, Ivey, additional, D’Addario, Larry, additional, and Lazio, Joseph, additional

Published
2023
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3. Two-Spacecraft Orbiting in Opposition to Enable Bistatic Radar Observations Around an Asteroid

Author

Anderson, Rodney L, Karimi, Reza R, Haynes, Mark S, Bandyopadhyay, Saptarshi, and Hernandez, Sonia

Abstract

Fundamental answers about the origin and evolution of the Solar System hinge on our ability to image in detail the 3D interior structure of small bodies at highresolution. By collecting radar measurements we can ultimately create 3D maps of the interior structure. In this study we focus our attention on a specific mission scenario which consists of a carrier spacecraft and two daughter spacecraft sent to orbit the asteroid Apophis. The orbits of the spacecraft are optimized to maximize radar measurements by dynamically modeling the harmonics and solar radiation pressure. For long mission durations, orbital correction maneuvers maintain the spacecraft in formation.

Published
2021

8. Inverse Scattering Under the Born Approximation Using an Object T-Matrix and Full Bistatic Spherical Sampling Geometry

Author

Haynes, Mark S., Fenni, Ines, and Davidsson, Bjorn J. R.

Abstract

Equations are derived for rapid generation of the electromagnetic inverse scattering solution of a dielectric object with known T-matrix under the Born approximation in a full bistatic spherical sampling geometry. Given an object T-matrix and no other information, the dielectric inversion can be computed without simulating forward scattering data under the conditions of quad-pol bistatic measurements over the sphere. Using the normal equation solution, the dielectric contrast is computed by deconvolving the T-matrix backprojected image with the vector bistatic point target response. The normal matrix is given analytically and has Toeplitz structure that facilitates fast Fourier transform (FFT)-accelerated conjugate gradient solutions of the matrix inverse. This is validated numerically using the T-matrix scattering solution for electrically large collections of dielectric objects. The formulation provides a semi-analytical expression for 3-D electromagnetic Born reconstruction.

Published
2024
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14. Altimetry Measurements From Planetary Radar Sounders and Application to SHARAD on Mars

Author

Steinbrugge, Gregor, primary, Haynes, Mark S., additional, Schroeder, Dustin M., additional, Scanlan, Kirk M., additional, Stark, Alexander, additional, Young, Duncan A., additional, Grima, Cyril, additional, Kempf, Scott, additional, Ng, Gregory, additional, Buhl, Dillon, additional, Voigt, Joana R. C., additional, Roatsch, Thomas, additional, and Blankenship, Donald D., additional

Published
2022
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19. Radar for Europa Assessment and Sounding: Ocean to Near-Surface (REASON).

Author

Blankenship DD, Moussessian A, Chapin E, Young DA, Wesley Patterson G, Plaut JJ, Freedman AP, Schroeder DM, Grima C, Steinbrügge G, Soderlund KM, Ray T, Richter TG, Jones-Wilson L, Wolfenbarger NS, Scanlan KM, Gerekos C, Chan K, Seker I, Haynes MS, Barr Mlinar AC, Bruzzone L, Campbell BA, Carter LM, Elachi C, Gim Y, Hérique A, Hussmann H, Kofman W, Kurth WS, Mastrogiuseppe M, McKinnon WB, Moore JM, Nimmo F, Paty C, Plettemeier D, Schmidt BE, Zolotov MY, Schenk PM, Collins S, Figueroa H, Fischman M, Tardiff E, Berkun A, Paller M, Hoffman JP, Kurum A, Sadowy GA, Wheeler KB, Decrossas E, Hussein Y, Jin C, Boldissar F, Chamberlain N, Hernandez B, Maghsoudi E, Mihaly J, Worel S, Singh V, Pak K, Tanabe J, Johnson R, Ashtijou M, Alemu T, Burke M, Custodero B, Tope MC, Hawkins D, Aaron K, Delory GT, Turin PS, Kirchner DL, Srinivasan K, Xie J, Ortloff B, Tan I, Noh T, Clark D, Duong V, Joshi S, Lee J, Merida E, Akbar R, Duan X, Fenni I, Sanchez-Barbetty M, Parashare C, Howard DC, Newman J, Cruz MG, Barabas NJ, Amirahmadi A, Palmer B, Gawande RS, Milroy G, Roberti R, Leader FE, West RD, Martin J, Venkatesh V, Adumitroaie V, Rains C, Quach C, Turner JE, O'Shea CM, Kempf SD, Ng G, Buhl DP, and Urban TJ

Abstract

The Radar for Europa Assessment and Sounding: Ocean to Near-surface (REASON) is a dual-frequency ice-penetrating radar (9 and 60 MHz) onboard the Europa Clipper mission. REASON is designed to probe Europa from exosphere to subsurface ocean, contributing the third dimension to observations of this enigmatic world. The hypotheses REASON will test are that (1) the ice shell of Europa hosts liquid water, (2) the ice shell overlies an ocean and is subject to tidal flexing, and (3) the exosphere, near-surface, ice shell, and ocean participate in material exchange essential to the habitability of this moon. REASON will investigate processes governing this material exchange by characterizing the distribution of putative non-ice material (e.g., brines, salts) in the subsurface, searching for an ice-ocean interface, characterizing the ice shell's global structure, and constraining the amplitude of Europa's radial tidal deformations. REASON will accomplish these science objectives using a combination of radar measurement techniques including altimetry , reflectometry , sounding , interferometry , plasma characterization , and ranging . Building on a rich heritage from Earth, the moon, and Mars, REASON will be the first ice-penetrating radar to explore the outer solar system. Because these radars are untested for the icy worlds in the outer solar system, a novel approach to measurement quality assessment was developed to represent uncertainties in key properties of Europa that affect REASON performance and ensure robustness across a range of plausible parameters suggested for the icy moon. REASON will shed light on a never-before-seen dimension of Europa and - in concert with other instruments on Europa Clipper - help to investigate whether Europa is a habitable world., Competing Interests: Competing InterestsThe authors have no competing interests to declare that are relevant to the content of this article., (© The Author(s) 2024.)

Published
2024
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