Results 21 to 30 of about 251,815 (286)
Nightside studies of coherent HF radar spectral width behaviour [PDF]
, 2002 A previous case study found a relationship between high spectral width measured by the CUTLASS Finland HF radar and elevated electron temperatures observed by the EISCAT and ESR incoherent scatter radars in the post-midnight sector of magnetic local time.
J. A. Davies +21 more
core +1 more source
The Belgian Repository of Fundamental Atomic Data and Stellar Spectra (BRASS)
Atoms, 2019 Background: BRASS (Belgian Repository of Fundamental Atomic Data and Stellar Spectra) is an international networking project for the development of a new public database providing accurate fundamental atomic data of vital importance for stellar ...
Alex Lobel +9 more
doaj +1 more source
An interhemispheric, statistical study of nightside spectral width distributions from coherent HF scatter radars [PDF]
, 2002 International audienceA statistical investigation of the Doppler spectral width parameter routinely observed by HF coherent radars has been conducted between the Northern and Southern Hemispheres for the nightside ionosphere.
Milan, S. E. +16 more
core +1 more source
On the stark broadening of Os II spectral lines [PDF]
Bulletin of Natural Sciences Research, 2020 Stark broadening parameters, full widths at half maximum (FWHM) and shifts for 13 Os II lines have been calculated. The plasma parameters are: electron density of 1017 cm-3 and temperatures from 5 000 K to 80 000 K.
Dimitrijević Milan S.
doaj
, 2020 The concentration of MgO is one of the most important parameters in the phosphate ore flotation. The fast detection of the concentration of MgO has great significance for the optimization of the flotation, the improvement of the efficiency and the ...
Sun Lan-xiang +4 more
core +1 more source
Diagnostics of active and eruptive prominences through hydrogen and helium lines modelling [PDF]
, 2008 In this study we show how hydrogen and helium lines modelling can be used to make a diagnostic of active and eruptive prominences. One motivation for this work is to identify the physical conditions during prominence activation and eruption. Hydrogen and
N. Labrosse +5 more
core +1 more source
Stark Broadening of Al IV Spectral Lines
Universe, 2023 Stark widths for 23 transitions in Al IV have been calculated by employing the modified semiempirical method. The results are obtained for an electron density of 1017 cm−3 and temperatures from 10,000 K to 160,000 K.
Milan S. Dimitrijević +1 more
doaj +1 more source
Adaptive numerical integration technique for the analysis of open planar circuits and antennas [PDF]
, 1997 This paper presents new adaptive integration technique in the spectral domain to speed up the impedance matrix calculation. This includes the adaptive truncation which limits the infinite integration into the finite computer resources and the adaptive ...
C. J. Railton +4 more
core +1 more source
Remote Sensing, 2023 Non-Gaussian impulsive noise in marine environments strongly influences the detection of weak spectral lines. However, existing detection algorithms based on the Gaussian noise model are futile under non-Gaussian impulsive noise.
Zhen Li, Junyuan Guo, Xiaohan Wang
doaj +1 more source
Analysis of Infrared Spectral Radiance of O2 1.27 μm Band Based on Space-Based Limb Detection
Remote Sensing, 2023 The infrared spectral radiance of O2 is of great significance for space-based infrared detection. In this work, based on the demand for near-infrared spectral radiance of O2 limb detection, a method of spectral radiance calculation coupled with an ...
Jingyu Bai +4 more
doaj +1 more source