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1.
V. P. Burmaka V. N. Lysenko L. F. Chernogor Yu. V. Chernyak 《Geomagnetism and Aeronomy》2006,46(6):742-759
Results of the observations performed using the wave-like disturbance (WLD) method at iono-spheric altitudes of 100–500 km during ten Soyuz and Proton rocket launches (RLs) in 2003–2005 have been analyzed. The observations were performed with the Kharkov incoherent scatter radar. It has been confirmed that WLDs propagated at a velocity of 560–740 m/s were observed reliably. Disturbances propagated at a higher velocity of several kilometers per second were observed indefinitely. Disturbances caused by RLs were most clearly defined at altitudes of 150–350 km. Rocket launches cased either enhancement or suppression of WLDs in the ionosphere. The relative amplitude of WLDs usually varied within 3–30%. 相似文献
2.
Using three radio techniques for determining the spatial and terminal distribution of the electron concentration in the ionospheric
F region, a number of parameters of medium-scale travelling ionospheric disturbances (the effective thickness of the atmospheric
waveguide and height of its axis, spatial and time periods, propagation speeds, and maximum amplitudes of the disturbances)
are determined. 相似文献
3.
Izvestiya, Atmospheric and Oceanic Physics - A low-parametric model of crop biomass dynamics using the data of satellite remote sensing of the underlying surface vegetation index and routine... 相似文献
4.
The speckle polarimeter is a facility instrument of the 2.5-mSAIMSU telescope that combines the features of a speckle interferometer and a polarimeter. The speckle polarimeter is designed for observations in several visible bands in the following modes: speckle interferometry, polarimetry, speckle polarimetry, and polaroastrometry. In this paper we describe the instrument design and the procedures for determining the angular scale of the camera and the position angle of the camera and the polarimeter. Our measurements of the parameters for the binary star HD 9165 are used as an example to demonstrate the technique of speckle interferometry. For bright objects the accuracy of astrometry is limited by the error of the correction for the distortion caused by the atmospheric dispersion compensator. At zenith distances less than 45? the additional relative measurement error of the separation is 0.7%, while the additional error of the position angle is 0.3°. In the absence of a dispersion compensator the accuracy of astrometry is limited by the uncertainty in the scale and position angle of the camera, which are 0.15% and 0.06°, respectively. We have performed polarimetric measurements of unpolarized stars and polarization standards. The instrumental polarization at the Cassegrain focus in the V band does not exceed 0.01%. The instrumental polarization for the Nasmyth focus varies between 2 and 4% within the visible range; we have constructed its model and give a method for its elimination from the measurements. For stars with an intrinsic polarization of less than 0.2% during observations at the Cassegrain focus the error is determined mainly by the photon and readout noises and can reach 5 × 10?5. 相似文献
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6.
Katrasov S. V. Bugaets A. N. Zharikov V. V Maslennikov S. I. Lysenko V. N. Barabanshchikov Yu. A. Tishchenko P. Ya. 《Oceanology》2021,61(5):668-676
Oceanology - The potential productivity of oysters and mussels was estimated for Voevoda Bay (Russky Island, Primorskii krai) using the FARM model. The main sources of primary production in the... 相似文献
7.
N. P. Kantserova V. V. Krylov L. A. Lysenko N. V. Ushakova N. N. Nemova 《Izvestiya Atmospheric and Oceanic Physics》2017,53(7):719-723
The effects of hypomagnetic conditions and the reversal of the geomagnetic field (GMF) on intracellular Ca2+-dependent proteases (calpains) of fish and invertebrates have been studied in vivo and in vitro. It is found that the intravital exposure of examined animals to hypomagnetic conditions leads to a significant decrease in its calpain activity. The activity of preparations of calcium-dependent proteases was tested in separate experiments. It is shown that preparations of Ca2+-dependent proteases from invertebrates and fish are also inactivated substantially under effect of hypomagnetic conditions. The ambiguous results obtained in the experiments with a reversed GMF do not make it possible to discuss the biological response of calcium-dependent proteases to the reversal of the GMF. 相似文献
8.
Using 2006–2010 American Community Survey data and a multilevel research design, this study examines how the spatial concentration of African Americans within local labor markets is associated with the probability of self-employment and job earnings from business ownership. We find a negative relationship between the spatial concentration of African Americans and their business ownership in Miami, but not in Atlanta. In Detroit, a higher percentage of US-born African Americans in the local labor market is actually associated with a higher probability of business ownership. The relationship between the percentage of African Americans and job earnings also differs across the three study areas. These results suggest that the relationship between racial/ethnic concentration and African American entrepreneurship is highly contingent on the economic conditions and demographic composition of local labor markets. 相似文献
9.
Bogatov V. V. Prozorova L. A. Chernova E. N. Lysenko E. V. Ngo Q. Tran T. Hoang S. 《Doklady Earth Sciences》2019,484(1):76-78
Doklady Earth Sciences - The concentrations of seven heavy metals (HMs) in tissues of bivalve mollusks of the families Unionidae (genera Ensidens, Scabies, Kunashiria) and Cyrenidae (genus... 相似文献
10.
A. V. Morozhenko A. S. Ovsak A. P. Vid’machenko V. G. Teifel P. G. Lysenko 《Kinematics and Physics of Celestial Bodies》2016,32(1):30-37
The values of the imaginary part of the refractive index n i of aerosol in bright (EZ, NTrZ, and STrZ) and dark (NTB, NEB, SEB, and STB) latitudinal bands of Jupiter’s disc have been determined. They are averaged over the effective depth where the intensity of radiation diffusely reflected by the planet is formed. These values turned out to be lower in the zones than in the belts: specifically, 0.00017–0.00041 vs. 0.00063–0.00098, 0.00019–0.00041 vs. 0.00065–0.00097, 0.00017–0.00041 vs. 0.00070–0.00112, and 0.00019–0.00044 vs. 0.00069–0.00111 at λ = 605, 631, 714, and 742 nm, respectively. These results probably indicate the difference in the vertical stratification of the nature of cloud layers, as well as in the sizes of aerosol particles (they are larger in the belts). 相似文献