Results 101 to 110 of about 4,347 (213)
, 2011 A significant number of Low Probability of Intercept (LPI) radars are used in various military applications, from guided weapons (such anti-ship missile), to large platforms (aircrafts, ships), to large systems (Integrated Air Defense Systems - IADS). The purpose of this thesis is to evaluate the performance of netted LPI radar systems.
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Design and Characteristic Analysis of Multicarrier Chaotic Phase Coded Radar Pulse Train Signal
International Journal of Antennas and Propagation, 2014 By introducing phase code into multicarrier orthogonal frequency division multiplex signal, the multicarrier phase coded (MCPC) radar signal possesses a good spectrum utilization rate and can achieve a good combination of narrowband and wideband ...
Qiongdan Huang +3 more
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Microwave scattering and emission properties of large impact craters on the surface of Venus [PDF]
Many of the impact craters on Venus imaged by the Magellan synthetic aperture radar (SAR) have interior floors with oblique incidence angle backscatter cross sections 2 to 16 times (3 dB to 12 dB) greater than the average scattering properties of the ...
Campbell, D. B. +2 more
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IEEE AccessThis paper presents an adaptive signal detection algorithm with dynamic dual-threshold for low probability of intercept (LPI) radar signals in complex electromagnetic environments.
Xiaoji Wei, Bilu Luo, Chunfang Gao
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Modeling interannual variability in the Martian seasonal CO2 cycle [PDF]
One aspect of the seasonal pressure variations measured at the Viking Lander sites is their nearly perfect interannual repeatability. This presents a problem because it implies that the behavior of the seasonal polar caps should be highly repeatable from
Paige, D. A., Wood, S. E.
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Composition of Near-Earth Asteroid (4179) Toutatis
, 2012 Surface composition of near-Earth asteroid (4179) Toutatis is consistent with an undifferentiated L-chondrite composition. This is inconsistent with early observations that suggested high pyroxene iron content and a differentiated body.Comment: 15 pages,
Abell, Paul +5 more
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Workshop on Advanced Technologies for Planetary Instruments, part 1 [PDF]
This meeting was conceived in response to new challenges facing NASA's robotic solar system exploration program. This volume contains papers presented at the Workshop on Advanced Technologies for Planetary Instruments on 28-30 Apr. 1993. This meeting was
Appleby, John F.
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32nd Annual Summer Intern Conference [PDF]
, 2016 Lunar and Planetary Institute; NASA Johnson Space CenterThermal Support of the Devana Chasma Rift, Venus / K. L. Bell, W. S. Kiefer, and M. B. Weller--Origin of Calcic Plagioclase in Polymict Ureilites / S. Boyle, C. A. Goodrich, and A. H. Treiman--Macro
core
Preliminary comparison of 3.5-cm and 12.6-cm wavelength continuous wave observations of Mars [PDF]
Radar observations of Mars at Goldstone in 1990 were conducted by transmitting pure sinusoidal signals at 3.5-cm wavelengths and receiving the Doppler-spread echoes from Mars at Earth. Radar transmissions were circularly polarized and the echoes recorded
Jurgens, R. F. +4 more
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Workshop on the Polar Regions of Mars: Geology, Glaciology, and Climate History, part 1 [PDF]
Papers and abstract of papers presented at the workshop are presented. Some representative titles are as follows: Glaciation in Elysium; Orbital, rotational, and climatic interactions; Water on Mars; Rheology of water-silicate mixtures at low ...
Clifford, S. M. +2 more
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