Article
Engineering, Aerospace
Thannasi Prabu, Kasinathan Muthukkumaran, Indaram Venugopal
Summary: This study investigates the effect of low gravity on the bearing capacity of the new lunar highland soil simulant LSS-ISAC-1 and compares it with lunar soils and simulants. The evaluation results indicate that the LSS-ISAC-1 simulant is more than sufficient to support virtually any conceivable structures.
ADVANCES IN SPACE RESEARCH
(2022)
Article
Geochemistry & Geophysics
Guangdong Zhao, Jianxin Liu, Bo Chen, Mikhail K. Kaban, Jinsong Du
Summary: The study focuses on the density structure beneath lunar mascon basins, proposing an efficient forward gravity method and demonstrating significant mantle uplift and thinned crust in these regions through 3-D inversion of gravity data. The density model is consistent with the formation processes of mascons, indicating thick, low-density crust and extensive fracturing of the crustal column.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2021)
Article
Geosciences, Multidisciplinary
Alexander L. Handwerger, Adam M. Booth, Mong-Han Huang, Eric J. Fielding
Summary: The study utilized satellite data to measure the three-dimensional surface deformation of 134 slow-moving landslides in the northern California Coast Ranges and infer their volume, active area, and frictional strength. It was found that these landslides primarily increase in size by expanding in area, and that frictional strength decreases with increasing landslide size.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2021)
Article
Automation & Control Systems
Saugato Dey, Thazhe Kunnath Sunil Kumar, Sankar Ashok, Saikat Kumar Shome
Summary: The inertial stabilized platform (ISP) is an important component in modern tracking systems, providing isolation from disturbances, maintaining altitude reference, and enabling rapid identification and tracking of targets. However, accurate tracking is challenging due to disturbances and system modeling uncertainties. To address this, a robust two-loop cascade control strategy is proposed, using a genetically optimized PID controller in the outer loop for precision tracking and a lower-order robust controller in the inner loop to mitigate disturbances. The strategy shows improved tracking performance and disturbance rejection compared to traditional PID control strategies.
TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL
(2023)
Article
Cardiac & Cardiovascular Systems
Laiyu Yao, Yuanjie Qi, Shuxin Xiao, Rui Liu, Jinshan Wo
Summary: Left bundle branch pacing (LBBP) in patients with third-degree atrioventricular block has shown to improve postoperative left ventricular systolic function and maintain good electromechanical synchronization.
JOURNAL OF ELECTROCARDIOLOGY
(2022)
Article
Engineering, Aerospace
Guilhem Moreaux, Frank G. Lemoine, Hugues Capdeville, Michiel Otten, Petr Stepanek, Jerome Saunier, Pascale Ferrage
Summary: In order to achieve the 2020 International Terrestrial Reference Frame (ITRF2020), the International DORIS Service provided a set of weekly solution files from 1993.0 to 2021.0 to the International Earth Rotation and Reference Systems Service (IERS). These files include station coordinates and Earth orientation parameters (EOPs) from fourteen DORIS satellites. The main objective of the study is to present the combination process and analyze the impact of the new modeling on the performance of the new combined solution.
ADVANCES IN SPACE RESEARCH
(2023)
Article
Astronomy & Astrophysics
Antonio Genova, Sander Goossens, Edoardo Del Vecchio, Flavio Petricca, Mikael Beuthe, Mark Wieczorek, Gianluca Chiarolanza, Gaetano di Achille, Giuseppe Mitri, Ivan Di Stefano, Bernard Charlier, Erwan Mazarico, Peter James
Summary: A new solution, HgM009, of Mercury's gravity field to degree and order 160 is achieved by reprocessing MESSENGER radio science measurements. Through combining the latest gravity field and topography data, localized spectral admittance analyses are conducted to explore the properties of Mercury's crust and lithosphere in the northern hemisphere. The analysis provides valuable information on the lateral variations of the upper crust's bulk density, with observations suggesting impact bombardment as the main cause of crustal porosity.
Article
Geochemistry & Geophysics
Matthew S. S. Collins, Paul K. K. Byrne, Christian Klimczak, Erwan Mazarico
Summary: This study demonstrates the existence of a specific fault structure in lunar maria, which is related to the evolution of mascon. This fault structure indicates compressive tectonic deformation of the lunar crust after impact events. The study also shows that this fault structure is not only present in the Mare Crisium, but also in several other maria.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2023)
Article
Engineering, Aerospace
Erwan Mazarico, Michael K. Barker, Amy M. Jagge, Andrew W. Britton, Samuel J. Lawrence, Jacob E. Bleacher, Noah E. Petro
Summary: The lunar poles are of high interest for exploration due to their potential to host useful volatiles and highly-illuminated regions. This study investigates the possibility of long traverses between these sites under complex and dynamic lighting conditions. Using high-resolution topographic maps, the researchers simulate time-varying illumination and find that long-distance sunlit pathways are possible but have lengthy durations, which can be optimized with specific survival capabilities.
Review
Astronomy & Astrophysics
Erwan Mazarico, Dustin Buccino, Julie Castillo-Rogez, Andrew J. Dombard, Antonio Genova, Hauke Hussmann, Walter S. Kiefer, Jonathan I. Lunine, William B. McKinnon, Francis Nimmo, Ryan S. Park, James H. Roberts, Dipak K. Srinivasan, Gregor Steinbrugge, Paolo Tortora, Paul Withers
Summary: The Europa Clipper mission aims to assess the habitability of Europa by improving our understanding of its interior structure, composition, and geologic activity. The Gravity and Radio Science (G/RS) investigation focuses on measuring the gravitational tidal Love number k(2) to determine the presence of a subsurface ocean. It also provides key measurements related to Europa's interior, ice shell, ionosphere, and plasma environment, complementing the other instruments onboard the spacecraft.
SPACE SCIENCE REVIEWS
(2023)
Article
Environmental Sciences
Mehdi Khaki, Shin-Chan Han, Khosro Ghobadi-Far, In-Young Yeo, Natthachet Tangdamrongsub
Summary: This article introduces a new method that directly assimilates data from the GRACE-FO laser ranging interferometer into a land surface model, overcoming the limitations of traditional approaches. The proposed method provides more accurate information on short time scales and has been applied globally and evaluated for its performance.
WATER RESOURCES RESEARCH
(2023)
Article
Astronomy & Astrophysics
Shin-Chan Han, Simon McClusky, T. Dylan Mikesell, Lucie Rolland, Emile Okal, Craig Benson
Summary: Multiple passages of atmospheric waves were observed after the HTHH volcanic eruption, perturbing the ionosphere and producing TIDs. New observations of TIDs at high altitudes (>550 km) were made using CubeSat GPS tracking data, which provided complementary information to ground receivers due to their larger spatial coverage over a shorter period of time. The TIDs traveled globally and reached high altitudes, indicating a speed of approximately 350 m/s.
EARTH AND SPACE SCIENCE
(2023)
Article
Astronomy & Astrophysics
Allison K. Glantzberg, Nancy L. Chabot, Michael K. Barker, Erwan Mazarico, Matthew A. Siegler, Jose Martinez M. Camacho, Colin D. Hamill, Edgard G. Rivera-Valentin, Heather Meyer, Stefano Bertone, Ariel N. Deutsch
Summary: Observations from Earth-based radar telescopes and the MESSENGER spacecraft have provided strong evidence for the presence of water ice in Mercury's polar craters. In this study, high-resolution digital elevation models were used to predict the regions of surface stability for ice and volatile organic compounds. Radar analysis showed a correlation between areas of high radar backscatter and predicted ice locations. While MDIS analysis did not confirm the presence of ice or volatiles, MLA results supported the presence of water ice at the surface in these craters. The upcoming BepiColombo mission has the potential to provide new measurements and further test these predictions.
PLANETARY SCIENCE JOURNAL
(2023)
Article
Astronomy & Astrophysics
Gael Cascioli, Joe P. Renaud, Erwan Mazarico, Daniele Durante, Luciano Iess, Sander Goossens, Suzanne Smrekar
Summary: Researchers investigate the possibility of measuring Venus's response to atmospheric loading using the VERITAS mission. They find that VERITAS has the potential to measure the loading Love numbers at a 4% level, which could help distinguish between different interior structure models.
PLANETARY SCIENCE JOURNAL
(2023)
Article
Astronomy & Astrophysics
Stefano Bertone, Erwan Mazarico, Michael K. Barker, Matthew A. Siegler, Jose M. Martinez-Camacho, Colin D. Hamill, Allison K. Glantzberg, Nancy L. Chabot
Summary: By utilizing existing elevation maps, we have created high-resolution topographic maps of Mercury's south pole. This allows for a more accurate analysis of illumination conditions, thermal conditions, and the characterization of potential ice and volatile deposits.
PLANETARY SCIENCE JOURNAL
(2023)
Editorial Material
Geochemistry & Geophysics
Isabelle Manighetti, Rachel Abercrombie, Yves Bernabe, Michael Bostock, Mark J. Dekkers, Satoshi Ide, Douglas R. Schmitt, Shin-Chan Han, Paul Tregoning
Summary: The editors of JGR-Solid Earth express their gratitude to the peer reviewers who contributed in reviewing articles for the journal in 2022.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Astronomy & Astrophysics
Fabrizio De Marchi, Gael Cascioli, Todd Ely, Luciano Iess, Eric A. Burt, Scott Hensley, Erwan Mazarico
Summary: The VERITAS mission by NASA is planned to launch towards Venus after 2027, and it was proposed to include a technology demonstration for the Deep Space Atomic Clock (DSAC-2). However, due to funding shortfalls, DSAC-2 had to be canceled. This study investigates the scientific value of atomic clocks like DSAC-2 onboard interplanetary spacecraft, specifically focusing on measuring possible discrepancies in redshift predicted by general relativity and violations of local Lorentz invariance and local position invariance principles.
Article
Astronomy & Astrophysics
Sander Goossens, Joe P. P. Renaud, Wade G. G. Henning, Erwan Mazarico, Stefano Bertone, Antonio Genova
Summary: Recent estimates of Mercury's rotational state and tidal response differ from previous reports, leading to implications for understanding the planet's interior structure. Through a comprehensive analysis of models that match various measurements, we find a range of interior structures that include possible low viscosities consistent with the presence of partial melt.
PLANETARY SCIENCE JOURNAL
(2022)
Article
Astronomy & Astrophysics
David E. E. Smith, Vishnu Viswanathan, Erwan Mazarico, Sander Goossens, James W. W. Head, Gregory A. A. Neumann, Maria T. T. Zuber
Summary: Changes in mass distribution affect the gravitational figure and reorient a planetary body's surface with respect to its rotational axis. The present-day lunar gravity field can reveal how the figure and pole position have evolved over the Moon's history. By examining each individual crater and basin, we investigate their contribution to the lunar gravitational figure and reconstruct the evolution of the pole position. We find that craters and basins in a certain diameter range have contributed significantly to the present-day power from the Moon's gravitational figure and resulted in a total displacement of the Moon's pole along the Earth-Moon tidal axis over the past approximately 4.25 billion years, with implications for the stability of volatiles in the polar regions.
PLANETARY SCIENCE JOURNAL
(2022)
Article
Astronomy & Astrophysics
Michael K. Barker, Nancy L. Chabot, Erwan Mazarico, Matthew A. Siegler, Jose M. Martinez-Camacho, Colin D. Hamill, Stefano Bertone
Summary: We present new high-resolution models of Mercury's north polar crater, Prokofiev, which confirm the presence of stable water ice within its permanently shadowed regions. The models also show that the radar-bright area in Prokofiev extends beyond its PSR boundary. The distribution of near-infrared albedo suggests the presence of a darkening agent and linear mixture models predict that at least half of the surface area is covered with this dark material. The results provide new constraints on Prokofiev's volatile deposit.
PLANETARY SCIENCE JOURNAL
(2022)