Connection between optical and radiometric characteristics of NaI (T1) scintillator

1968 ◽  
Vol 11 (12) ◽  
pp. 1689-1692
Author(s):  
M. E. Globus ◽  
Yu. A. Tsirlin ◽  
A. M. Rather
Keyword(s):  
Radiometric Characteristics

Measurement Method of Infrared Radiometric Characteristics for High-Temperature Small Targets

2017 ◽  
Vol 37 (10) ◽  
pp. 1012004 ◽  
Author(s):  
田棋杰 Tian Qijie ◽  
李 周 Li Zhou ◽  
常松涛 Chang Songtao ◽  
何锋赟 He Fengyun ◽  
乔彦峰 Qiao Yanfeng
Keyword(s):  
High Temperature ◽  
Measurement Method ◽  
Small Targets ◽  
Radiometric Characteristics

scholarly journals High-Resolution, Near Real-Time Simulation of Microwave Radiance Using a Simple Land-Cover Based Emissivity Prior

2014 ◽  
Vol 2014 ◽  
pp. 1-15
Author(s):  
Dimitrios Katsanos ◽  
Eduardo García-Ortega ◽  
Manuel de Castro ◽  
Enrique Arias ◽  
Francisco J. Tapiador
Keyword(s):  
Surface Characteristics ◽  
Soil Characteristics ◽  
Simple Approach ◽  
Satellite Observations ◽  
Atmospheric Conditions ◽  
Orbital Parameters ◽  
Time Simulation ◽  
Iterative Procedures ◽  
Radiometric Characteristics ◽  
Key Parameter

Satellite simulators are used to calculate the brightness temperatureTbthat would be measured by a space borne sensor under a set of atmospheric conditions accounting for the radiometric characteristics of the sensor and the orbital parameters of the satellite. In this study, a simple approach is proposed for the parameterization of emissivity over land, a key parameter for the calculation of microwaveTb. The rationale is to simulate a large ensemble of emissivity values for each frequency and surface characteristics and then relate the most likely observed value with soil characteristics. The derived emissivity values are used for the simulation ofTband simulated radiance is then compared with satellite observations. It is shown that this method improves the simulation of radiance and that it is suitable to provide a first guess of the emissivity value (a prior) that can then be refined using iterative procedures.

An Analytical Approach Regarding Some Radiometric Problems during the Detection on the Sea Surface with a Thermal Camera

2013 ◽  
Vol 436 ◽  
pp. 318-325 ◽  
Author(s):  
Catalin Spulber ◽  
Octavia Violeta Borcan
Keyword(s):  
Atmospheric Pollution ◽  
System Performance ◽  
Analytical Approach ◽  
Sea Surface ◽  
Thermal Camera ◽  
Analysis Software ◽  
Surface Detection ◽  
Thermal Signature ◽  
Radiometric Characteristics ◽  
Made In

The paper presents some methods to evaluate a thermal signature acquired with a thermal camera from some targets in marine background. Using a simulation interface made in MAVIIS 1,5 [ and with the ImageJ [ analysis software, the authors reveal the dependence between the atmospheric pollution, geometrical and radiometric characteristics of the targets and their backgrounds used during the sea surface detection, and the system performance of the thermal camera sensor.

scholarly journals Radiometric Characteristics of Geostationary Ocean Color Imager (GOCI) for Land Applications

2012 ◽  
Vol 28 (3) ◽  
pp. 277-285 ◽  
Author(s):  
Kyu-Sung Lee ◽  
Sung-Min Park ◽  
Sun-Hwa Kim ◽  
Hwa-Seon Lee ◽  
Jung-Il Shin
Keyword(s):  
Ocean Color ◽  
Radiometric Characteristics

scholarly journals GEOMETRIC AND RADIOMETRIC EVALUATION OF RASAT IMAGES

2016 ◽  
Vol XLI-B1 ◽  
pp. 287-290
Author(s):  
Ali Cam ◽  
Hüseyin Topan ◽  
Murat Oruç ◽  
Mustafa Özendi ◽  
Çağlar Bayık
Keyword(s):  
Remote Sensing ◽  
Urban Areas ◽  
Geometric Analysis ◽  
Test Site ◽  
Transformation Models ◽  
Affine Projection ◽  
Dense Forest ◽  
Physical Transformation ◽  
Rgb Images ◽  
Radiometric Characteristics

RASAT, the second remote sensing satellite of Turkey, was designed and assembled, and also is being operated by TÜBİTAK Uzay (Space) Technologies Research Institute (Ankara). RASAT images in various levels are available free-of-charge via Gezgin portal for Turkish citizens. In this paper, the images in panchromatic (7.5 m GSD) and RGB (15 m GSD) bands in various levels were investigated with respect to its geometric and radiometric characteristics. The first geometric analysis is the estimation of the effective GSD as less than 1 pixel for radiometrically processed level (L1R) of both panchromatic and RGB images. Secondly, 2D georeferencing accuracy is estimated by various non-physical transformation models (similarity, 2D affine, polynomial, affine projection, projective, DLT and GCP based RFM) reaching sub-pixel accuracy using minimum 39 and maximum 52 GCPs. The radiometric characteristics are also investigated for 8 bits, estimating SNR between 21.8-42.2, and noise 0.0-3.5 for panchromatic and MS images for L1R when the sea is masked to obtain the results for land areas. The analysis show that RASAT images satisfies requirements for various applications. The research is carried out in Zonguldak test site which is mountainous and partly covered by dense forest and urban areas.

scholarly journals Optical properties in the visible range of two different India ink used as biological phantoms

2021 ◽  
Vol 93 (1) ◽  
pp. 10502
Author(s):  
Ali Shahin ◽  
Wesam Bachir ◽  
Moustafa Sayem El-Daher
Keyword(s):  
Wavelength Range ◽  
Integrating Sphere ◽  
Visible Range ◽  
Absorption Feature ◽  
Absorption Property ◽  
Structural Profile ◽  
India Ink ◽  
Visible Wavelength Range ◽  
Experimental Errors ◽  
Radiometric Characteristics

The optical characteristics of two different brands of India ink, Parker Quink and Pelikan, as an absorber used in preparation a tissue-simulating phantom, have been investigated at visible wavelength range. For this purpose, a single integrating sphere system and a spectrophotometric transmission spectroscopy have been used to estimate the radiometric characteristics. Then, inverse adding-doubling algorithm was implemented to retrieve the optical coefficients of pure ink samples. Parker ink's absorption behavior turned out to incompatible with Pelikan over the present wavelength range. Furthermore, scattering property of both two brands has been exhibited and the albedo was calculated. Parker albedo showed a decremental behavior with wavelength and varied between 0.381 and 0.13. A structural profile of albedo was found for Pelikan, which varied between 0.366 and 0.03. This discrepancy might be explained by the variety of two brands composition besides experimental errors. Furthermore, Parker ink absorption variation turned out to be in correspondence to several tissues' absorption feature over broad wavelength ranges. Finally, Parker ink could be regarded as a better candidate to mimic absorption property for several tissues.

Sign in / Sign up

Export Citation Format

Share Document