Recovery of Images Distorted by an Instrument Function with Unknown Side Lobes

2018 ◽  
Vol 63 (3) ◽  
pp. 212-219
Author(s):  
V. A. Cherepenin ◽  
A. V. Kokoshkin ◽  
V. A. Korotkov ◽  
K. V. Korotkov ◽  
E. P. Novichikhin
Keyword(s):  
Instrument Function

Instrument function of a two-aperture radiometer

2003 ◽  
Author(s):  
Jose G. Suarez-Romero ◽  
Eduardo Tepichin RodrIguez
Keyword(s):  
Instrument Function

scholarly journals Strato-mesospheric ClO observations by SMILES: error analysis and diurnal variation

2012 ◽  
Vol 5 (4) ◽  
pp. 4667-4710 ◽  
Author(s):  
T. O. Sato ◽  
H. Sagawa ◽  
D. Kreyling ◽  
T. Manabe ◽  
S. Ochiai ◽  
...  
Keyword(s):  
Error Analysis ◽  
Diurnal Variation ◽  
Middle Atmosphere ◽  
Total Error ◽  
Space Station ◽  
Submillimeter Wave ◽  
Radiative Transfer Model ◽  
Transfer Model ◽  
Instrument Function ◽  
Key Species

Abstract. Chlorine monoxide (ClO) is the key species for anthropogenic ozone loss in the middle atmosphere. We observed the ClO diurnal variation using the Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES) on the International Space Station which has a non sun-synchronous orbit. This is the first global observation of the ClO diurnal variation from the stratosphere up to the mesosphere. The SMILES observation reproduced the diurnal variation of stratospheric ClO, an enhancement during a daytime, as observed by the Microwave Limb Sounder on the Upper Atmosphere Research Satellite (UARS/MLS). Mesospheric ClO has shown a different diurnal behavior with an enhancement during nighttime. The ClO enhancement was found at a pressure of 0.02 hPa (about 70 km) with an amplitude of about 100 pptv and reached up to 0.01 hPa (80 km) in the zonal mean of 50° N–65° N in January–February 2010. The observation of mesospheric ClO was possible due to the 10–20 times better signal-to-noise ratio of the spectra than those of past microwave/submillimeter-wave limb-emission sounders. We performed a quantitative error analysis for the strato- and mesospheric ClO of the Level-2 research (L2r) product version 2.1.5 taking into account all possible error contributions; i.e. errors due to spectrum noise, smoothing and uncertainties in the radiative transfer model and instrument function. The SMILES L2r v2.1.5 ClO data are useful over the range 0.01 and 100 hPa with a total error of 10–30 pptv (about 10%) with averaging of 100 profiles. The vertical resolution is 3–5 km and 5–8 km for the stratosphere and mesosphere, respectively. The performance of the SMILES observation opens the new opportunity to investigate ClO up to the mesopause.

scholarly journals Advances in Synchrotron X-ray Polycrystalline Diffraction

1988 ◽  
Vol 41 (2) ◽  
pp. 101 ◽  
Author(s):  
William Parrish
Keyword(s):  
High Resolution ◽  
Grazing Angle ◽  
Anomalous Scattering ◽  
Wavelength Selection ◽  
High Count ◽  
Instrument Function ◽  
X Ray ◽  
Depth Analysis ◽  
Diffraction Patterns ◽  
New Applications

The advantages of synchrotron radiation for X-ray polycrystalline diffraction are illustrated by a number of examples. The plane wave parallel-beam X-ray optics uses a Si(lll) channel monochromator for easy wavelength selection and a set of long parallel slits to define the diffracted beam. The constant simple instrument function and the high resolution symmetrical profiles (FWHM 0.05") greatly simplify the data analysis and add a new dimension to profile broadening studies. The geometry permits uncoupling the 6-26 sample-detector relationship without changing the profile shape and makes possible new applications such as grazing angle incidence depth analysis of thin films. The same instrumentation is used for high resolution energy dispersive diffraction (BOD) by step-scanning the monochromator. The resolution is two orders of magnitude better than conventional BOD and can be used at high count rates. The easy wavelength selection yields diffraction patterns with the highest PI B and permits anomalous scattering studies.

Computer Simulation of Powder Patterns

1983 ◽  
Vol 27 ◽  
pp. 75-80
Author(s):  
W. Parrish ◽  
T. C. Huang ◽  
G. L. Ayers
Keyword(s):  
Computer Simulation ◽  
Powder Diffraction ◽  
Line Broadening ◽  
Instrument Function ◽  
X Ray ◽  
Profile Fitting ◽  
Fitting Algorithm ◽  
Diffraction Patterns

AbstractA method for computer simulation of X-ray powder diffraction patterns which are identical to those obtained experimentally is described. The calculated pattern is generated directly from the d's (or 2θs) and intensities of the phase(s) and is based on a profile fitting algorithm which uses the instrument function to form the profile shapes at all reflection angles. Examples of simulated patterns of mixtures, line broadening, linear and amorphous backgrounds, and counting noise are given.

Functional Safety as An Integral Part of Engineering Tasks

2019 ◽  
Vol 7 (2) ◽  
pp. 65-70
Author(s):  
О. Заломнова ◽  
O. Zalomnova
Keyword(s):  
Qualitative Analysis ◽  
High Intensity ◽  
Industrial Processes ◽  
Functional Safety ◽  
Analysis Method ◽  
System Safety ◽  
Instrument Function ◽  
Safety Integrity Level

In this paper have been considered the basic terms of functional safety for industrial processes according to GOST R IEC61511–1–2011 «Functional Safety. Safety Instrument Systems for Industrial Processes»: safe and dangerous failures, safety instrumented system, safety instrument function, safety integrity level. The qualitative analysis method — the study of hazard and operability HAZOP using the control words — has been considered. The algorithm for HAZOP carrying out has been presented. Safety integrity levels for low and high intensity of requests have been considered. An example for safety integrity level determination has been depicted.

The Analysis and Discussion of the Actual Case about the Differential Protection Malfunction Caused by the Transient Exciting Current of Large-Scale High-Voltage Main Transformer at the Time of Switching

2013 ◽  
Vol 694-697 ◽  
pp. 785-789
Author(s):  
Yang Gao ◽  
Guo Yan Liang
Keyword(s):  
High Voltage ◽  
Large Scale ◽  
Current Transformer ◽  
Differential Protection ◽  
Instrument Function ◽  
Actual Case ◽  
Test Analysis ◽  
Use Of Data ◽  
Exciting Current ◽  
Transformer Differential Protection

In this paper, based on the choice of voltage level 500kV for large transformer differential protection of maloperation accident actually as an example, discusses how to improve the reliability and the transformer differential protection with the relationship between pressure test. Analysis found that in order to avoid the excitation transient exciting current transformer differential protection sparked the misoperation, on-site technical personnel in the differential protection setting calculation process, make use of data in conformity with the relevant parameters, rules and standards, familiar with differential protection, also need to understand the characteristics of transformer excitation transient exciting current high-voltage tests, the influence of characteristic more should fully exert the modern PC wave record device, instrument function can improve the actual effect of transformer differential protection. This factory for transformer differential protection for setting, protection greatly improves the reliability. This experience is worth popularizing.

Series representation of the instrument function of a two-aperture radiometer

2004 ◽  
Author(s):  
Juan C. Solorio-Leyva ◽  
Jose G. Suarez-Romero ◽  
Juan B. Hurtado-Ramos ◽  
Eduardo Tepichin-Rodriguez ◽  
Jose G. Cortes-Reynoso
Keyword(s):  
Series Representation ◽  
Instrument Function
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