Two-dimensional aperture photometry - Signal-to-noise ratio of point-source observations and optimal data-extraction techniques

1989 ◽  
Vol 101 ◽  
pp. 616 ◽  
Author(s):  
Steve B. Howell
Keyword(s):  
Point Source ◽  
Signal To Noise Ratio ◽  
Data Extraction ◽  
Two Dimensional ◽  
Extraction Techniques ◽  
Signal To Noise ◽  
Noise Ratio

Signal-to-noise ratio enhancement of a Hadamard transform spectrometer using a two-dimensional slit-array

2017 ◽  
Vol 56 (25) ◽  
pp. 7188 ◽  
Author(s):  
Mingbo Chi ◽  
Yihui Wu ◽  
Fang Qian ◽  
Peng Hao ◽  
Wenchao Zhou ◽  
...  
Keyword(s):  
Signal To Noise Ratio ◽  
Hadamard Transform ◽  
Two Dimensional ◽  
Signal To Noise ◽  
Noise Ratio

The reduction of statistical noise in airborne radiometric data

1976 ◽  
Vol 13 (10) ◽  
pp. 1351-1357 ◽  
Author(s):  
J. Tammenmaa ◽  
R. L. Grasty ◽  
M. Peltoniemi
Keyword(s):  
Energy Spectrum ◽  
Point Source ◽  
Signal To Noise Ratio ◽  
Measurement Time ◽  
Signal To Noise ◽  
Analytical Expression ◽  
Noise Ratio ◽  
Radiometric Data ◽  
Statistical Noise

An analytical expression for the Fourier energy spectrum of a radioactive point source is found to satisfactorily define that part of the spectrum in which all radiometric features are located. It is shown that the decreased signal-to-noise ratio arising from a shorter measurement time can be regained by the application of a suitable filter, resulting in better ground resolution and less distortion of radiometric anomalies.

scholarly journals Multiparametric approach to the assessment of muon tomographic results for the inspection of a full-scale container

2021 ◽  
Vol 136 (1) ◽  
Author(s):  
F. Riggi ◽  
M. Bandieramonte ◽  
U. Becciani ◽  
D. L. Bonanno ◽  
G. Bonanno ◽  
...  
Keyword(s):  
Signal To Noise Ratio ◽  
Single Scattering ◽  
Full Scale ◽  
Experimental Results ◽  
Two Dimensional ◽  
Signal To Noise ◽  
Scattering Angle ◽  
Multiparametric Analysis ◽  
Noise Ratio ◽  
Cargo Containers

AbstractExperimental results from a dataset collected with a full-scale muon tomograph for the inspection of cargo containers were studied in a single scattering scenario with a multiparametric analysis based on the method of the Point Of Closest Approach (Poca). To search for high-Z materials, a 4 $$\hbox {dm}^3$$ dm 3 Pb block was positioned inside the volume to be inspected, in order to quantitatively investigate the appearance of the Poca signal. Signal-to-noise ratio and significance of the Poca signal were investigated by means of mono-dimensional spectra of the Poca components, for different values of the scattering angle between the incoming and outgoing muon tracks and with different angle-dependent weights. A systematic scan of two-dimensional maps was also carried out, as a strategy to search for possible enhancements to the Poca signal. A comparison was also done between the results obtained from the two half-volumes, one containing the Pb block and one left empty, to take into account the response of the detector and some aspects of the Poca strategy.

A triple-drain MOSFET magnetic-field sensor

1985 ◽  
Vol 63 (6) ◽  
pp. 695-698 ◽  
Author(s):  
A. Nathan ◽  
A. M. J. Huiser ◽  
H. P. Baltes ◽  
H. G. Schmidt-Weinmar
Keyword(s):  
Magnetic Field ◽  
Surface Charge ◽  
Signal To Noise Ratio ◽  
Magnetic Field Sensor ◽  
Two Dimensional ◽  
Signal To Noise ◽  
Linear Region ◽  
Field Sensor ◽  
Device Geometry ◽  
Noise Ratio

The two-dimensional distributions of the potential, current, and surface charge for a magnetic-field-sensitive N-channel MOSFET have been computed numerically. The MOSFET is operated in the linear region and is based on a triple-drain configuration. The sensitivity as well as the signal-to-noise ratio is studied for a variety of channel geometries, and an optimal device geometry is presented.

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