Results 31 to 40 of about 144,334 (313)
Radio Polarimetry of Tycho's SNR [PDF]
Symposium - International Astronomical Union, 1990 The remnant of Tycho's supernova of 1572 has been polarimetrically imaged using the 4 configurations of the VLA at wavelengths of 22 and 6 cm. A few data were also obtained at wavelengths of 21, 19, and 18 cm in the B configuration to check for any ambiguities in the Faraday rotation measurements and to look for deviations from the λ2 dependence of the
John R. Dickel +2 more
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Optical coherence tomography with a Fizeau interferometer configuration [PDF]
, 2005 We report the investigation of a Fizeau interferometer-based OCT system. A secondary processing interferometer is necessary in this configuration, to compensate the optical path difference formed in the Fizeau interferometer between the end of the ...
H. D. Ford +7 more
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SNR Comparisons of Beamforming Strategies [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2007 This paper defines the echo signal-to-noise ratio (eSNR) for pulse-echo systems that adapts to the effects of shift-varying impulse responses, spatiotemporal coding, and various beamformers. Measurement techniques using point targets or random scattering media can be interrelated for a broad range of experimental conditions through the eSNR.
Jie, Liu +2 more
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SNR Walls for Signal Detection [PDF]
IEEE Journal of Selected Topics in Signal Processing, 2008 This paper considers the detection of the presence/absence of signals in uncertain low SNR environments. Small modeling uncertainties are unavoidable in any practical system and so robustness to them is a fundamental performance metric. The impact of these modeling uncertainties can be quantified by the position of the "SNR wall" below which a detector
Rahul Tandra, Anant Sahai
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Chandra observations of SNR 1987A [PDF]
Advances in Space Research, 2004 8 pages, 6 figures, 2 color figures, To appear in AdSpR (Proceedings 34th COSPAR Synposium E1.4 "High Energy Studies of Supernova Remnants and Neutron stars" For high resolution color figures contact park@astro.psu ...
Park, S. +6 more
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DTI denoising for data with low signal to noise ratios [PDF]
, 2005 Low signal to noise ratio (SNR) experiments in diffusion tensor imaging (DTI) give key information about tracking and anisotropy, e. g., by measurements with small voxel sizes or with high b values.
Prigarin, Sergej M. +6 more
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Rancang Bangun Sistem Mode Persiapan pada Mobil Berbasis Mikrokontroler
Jurnal Jaringan Telekomunikasi, 2021 People want a vehicle that is ready to use without having to wait for long or in the sense that the performance of an activity can run efficiently.
Alfan Tamamy +2 more
doaj +1 more source
Sensors, 2019 A GNSS station, located on the shore of sea and inland waters, and equipped with standard geodetic receivers and antennas, can be used to measure water levels using a technique called GNSS Interferometric Reflectometry (GNSS-IR).
Minfeng Song +4 more
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The Kinematics of The SNR G292.0+1.8 [PDF]
Symposium - International Astronomical Union, 1983 Optical velocity field mapping of G292.0+1.8 in the [0III] λ5007 å line has been carried out using the IPCS with the 3.6 m ESO telescope at La Silla. Our data are not consistent with the suggestion that the [0III] emitting material in the western portion of this remnant is concentrated in an expanding ring. The existing data on G292.0+1.8 suggests that
R. Braun +3 more
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The Morphologies of SNRs and their ISM and CSM [PDF]
Symposium - International Astronomical Union, 1998 Recently, many unusual morphologies of supernova remnants (SNRs) have been discovered: semicircular shell; center-brightened but without center point source; two-lobed; bipolar; irregular, etc. To understand these varieties of morphologies, we have made theoretical models.
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