Results 121 to 130 of about 4,347 (213)
Paradigm lost: Venus crater depths and the role of gravity in crater modification [PDF]
Previous to Magellan, a convincing case had been assembled that predicted that complex impact craters on Venus were considerably shallower than their counterparts on Mars, Mercury, the Moon, and perhaps even Earth.
Sharpton, Virgil L.
core +1 more source
LPI Radar Waveform Modulation Recognition Based on Improved EfficientNet
ElectronicsTo address the challenge of low modulation recognition accuracy for Low Probability of Intercept (LPI) radar waveforms under low Signal-to-Noise Ratio (SNR) conditions—a critical limitation in current radar signal processing research—this study proposes a novel recognition framework anchored in an improved EfficientNet model.
Yuzhi Qi +4 more
openaire +1 more source
Sequential deformation of plains along Tessera boundaries on Venus: Evidence from Alpha Regio [PDF]
Tesserae are regions of elevated terrain characterized by two or more sets of ridges and grooves that intersect orthogonally. Tesserae comprise 15-20 percent of the surface of Venus, but the nature of their formation and evolution is not well understood;
Gilmore, M. S., Head, James W., III
core +1 more source
Design of Wideband FMCW Radar Transceiver System Using Photonic Elements. [PDF]
Micromachines (Basel), 2023 Yoo S, Bae Y, Jang S.
europepmc +1 more source
Resource availability at Taurus-Littrow [PDF]
Early lunar technologies will probably use a common lunar material as ore. They will be robust to minor fluctuations in feedstock composition and will not require appreciable feedstock beneficiation such as rock grinding or mineral concentration ...
Colson, R. O., Haskin, Larry A.
core +1 more source
Surface processes on Venus [PDF]
Magellan synthetic aperture radar (SAR) and altimetry data were analyzed to determine the nature and extent of surface modification for venusian plains in the Sedna Planitia, Alpha Regio, and western Ovda Regio areas. Specific cross sections derived from
Arvidson, R. E.
core +1 more source
DESIGN OF LPI WAVEFORMS FOR MONOSTATIC RADAR
, 2009 The low probability of intercept is an important feature for the radar to survive modern warfare. In order to achieve this feature, studies show that the radar's transmitted energy should be well spread in time and frequency. However for monostatic configuration where the received echoes are blanked during the transmission, the spread in time increases
openaire +1 more source
Understanding the variation in the millimeter-wave emission of Venus [PDF]
Recent observations of the millimeter-wave emission from Venus at 112 GHz (2.6 mm) have shown significant variations in the continuum flux emission that may be attributed to the variability in the abundances of absorbing constituents in the Venus ...
Fahd, Antoine K., Steffes, Paul G.
core +1 more source
Adaptive Tracking of High-Maneuvering Targets Based on Multi-Feature Fusion Trajectory Clustering: LPI's Purpose. [PDF]
Sensors (Basel), 2022 Wei L, Chen J, Ding Y, Wang F, Zhou J.
europepmc +1 more source
NASA geology program bibliography [PDF]
A bibliography of scientific papers, articles, and books based on research supported by the NASA Geology Program is given. The citations cover the period 1980 to 1990.
core +1 more source