experimental study of the atmospheric conditions conducive to high radio fields

by H. T. Dougherty

Publisher: Institute for Telecommunication Sciences; for sale by the Supt. of Docs., U.S. Govt. Print. Off., Washington in Boulder, Colo

Written in English
Published: Pages: 52 Downloads: 380
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  • Tropospheric radio wave propagation.,
  • Radio meteorology.

Edition Notes

Statement[by] H. T. Dougherty, R. E. McGavin [and] R. W. Krinks.
SeriesOT/ITS research report 4
ContributionsMcGavin, R. E., 1921- joint author., Krinks, R. W., joint author.
LC ClassificationsTK5101.A1 I47 no. 4, TK6553 I47 no. 4
The Physical Object
Paginationiii, 52 p.
Number of Pages52
ID Numbers
Open LibraryOL5025713M
LC Control Number73611796

Sampling of ions at atmospheric pressure: ion transmission and ion energy studied by simulation and experiment Article in The European Physical Journal D 70(5) May with Reads. in turn provides a novel way to study atmospheric electric fields. DOI: /PhysRevLett PACS numbers: Pw, Ry, sd One of the important open questions in atmospheric physics concerns the physical mechanism that initiates lightning in thunderclouds [1]. Crucial to the answer is knowledge of atmospheric electric fields. Year to year fluctuations in the magnitude of ozone depletion and the area of the ozone hole are likely due to inter-annual variations in atmospheric circulation at high latitudes. Climate Weather conditions at some locality averaged over a specified time interval. Condensation, atmospheric motion, and cold beer The hottest and most humid conditions occur in coastal areas along the Persian Gulf and the Red Sea. the study of water in Earth’s atmosphere continues to be one of the main challenges in atmospheric science. This research on atmospheric water vapor was supported by NSF grants AGS.

found for the heavy overcast conditions on Octo They reported that the cloud layer between the aircrafts ab-sorbed 37% of the incoming solar irradiance. In comparison, model estimates of total atmospheric absorptance are usually;24% [Li et al., ]. In a companion study, Zender et al. [] reported a mean discrepancy of. Particulate matter (PM) is an essential source of atmospheric pollution in metropolitan areas since it has adverse effects on human health. However, previous research suggested wetlands can remove particulate matter from the atmosphere to land surfaces. This study was conducted in the Hanshiqiao Wetland National Nature Reserve in Beijing during The concentrations of PM10 and PM on a. Propagation Engineering in Radio Links Design Abdollah Ghasemi, Ali Abedi, Farshid Ghasemi This book addresses propagation phenomena in satellite, radar, broadcasting, short range, trans-horizon and several recent modes of communications in radio links. each of these dispersion experiments. This pilot study incorporated data from five long-range dispersion experiments, to be described in more detail below, which represent a collection of more t air concentration samples, re-analysis fields from the National Center for Atmospheric.

1. coldest layer of the atmosphere 2. atmosphere layer including the ozone layer 3. layer of atmosphere closest to Earth 4. uppermost layer of the atmosphere 5. Most of the carbon dioxide exist here6. region above the mesosphere where auroras occur 7. radio waves are reflected here.   Titan is Saturn's largest moon and the second largest in the solar system (after Ganymede of Jupiter). It is the only moon in the solar system with clouds and a dense, planet-like atmosphere. Experimental set-up to study optical properties of gases at typically planetary conditions but it could be significantly reduced by analysis of high resolution radar images of flow fields and altimetry resolving the thickness of flows. Abstract Nr. 60 Thermal evolution of an early magma ocean in interaction with the atmosphere. Click on the title to browse this issue.

experimental study of the atmospheric conditions conducive to high radio fields by H. T. Dougherty Download PDF EPUB FB2

Get this from a library. An experimental study of the atmospheric conditions conducive to high radio fields. [H T Dougherty; R E McGavin; R W Krinks; Institute for Telecommunication Sciences,; United States.

Department of Commerce. Office of Telecommunications.] -- The results are presented for a month experimental investigation of anomalous propagation on two overland transhorizon paths. An experimental study of the atmospheric conditions conducive to high radio fields / By H.

(Harold T.) Dougherty, R. Krinks and R. McGavin Abstract. Meteorological and astronomical influences on radio wave propagation: proceedings of papers read at the A world atlas of atmospheric radio refractivity / B.

Bean [et al.] An experimental study of the atmospheric conditions conducive to high radio fields / [by] H. Doughert. This dissertation describes an experimental study of the effects of an atmospheric thermal plume on the propagation of electromagnetic waves over a line-of-sight radio link.

With the use of a simple two-layer model for the atmospheric electric field, these patterns can be well reproduced by state-of-the-art simulation codes.

This in turn provides a novel way to study atmospheric electric by: The Terrain-Induced Rotor Experiment (T-REX) is a coordinated international project, composed of an observational field campaign and a research program, focused on the investigation of atmospheric rotors and closely related phenomena in complex terrain.

The T-REX field campaign took place during Experimental study of the atmospheric conditions conducive to high radio fields book and April in the lee of the southern Sierra Nevada in eastern California.

American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA Jansky's observation of extraterrestrial radio waves and his identification of their origin in the direction of the galactic center were among the most important fundamental astronomical discoveries of the twentieth century -American National Biography FIRST EDITIONS IN ORIGINAL WRAPPERS of Karl Jansky's ground-breaking papers announcing the discovery of radio astronomy, a new science that has.

Influence of atmospheric electric fields on the radio emission from extensive air showers. Physical Review D: Particles and Fields, Gravitation, and Cosmology, 93(2), An experimental study comprising the measurement of the permittivity spectrum as well as the air velocity spectrum along the vertical direction in the.

Between andthe Centre Scientifique et Technique du Bâtiment (CSTB) carried out a study of the overspeed effect over a hill in the surface boundary layer.

The hill in question was situated in open country and had a drop of about m for an average slope of 8%. The experimental equipment consisted of three 25 m high masts placed along the upwind slope of the hill.

KEYWORDS: Atmospheric propagation, Micromirrors, Modulators, Turbulence, Diffraction gratings, Binary data, Optical vortices, Atmospheric optics, Spiral phase plates, Video Read Abstract + The paper presents the results of an experiment on the formation of vortex optical fields propagating in a convective turbulent medium.

In this study, the initial field is provided by an omni directional antenna (i.e., F (p) = 1 for all angles θ) and the PF (in decibels) is defined as the square of the ratio of the electric field.

With the purpose of assessing snowfall absorption, the antenna of the second receiver was protected under a shield to prevent the accumulation of hydrometeors on its surface. Two years of data collected under these conditions were analyzed for the study, namely, October to September They include the winters – and – [5] Atmospheric and oceanic fields in the Indian Ocean have been evaluated in relation to the interannual variability of October–November rainfall at the coast of equatorial East Africa, represented by the index RON [Hastenrath et al., ], detailed further in section ed maps are reproduced here in Figure n characteristics of correlations with UEQ are essentially the same.

Influence of atmospheric conditions on the X max estimation Example with one reconstructed event. In this section we show the importance to consider the actual atmospheric experimental conditions to reconstruct X max from the radio signal.

The method is based on the comparison of the LDF actually sampled by an array of antennas such as. Perdigão Experimental Group Over the past month, researchers have descended on Portugal's Vale Do Cobrão near the Spanish border to study the valley's wind flow patterns.

Sincea comprehensive picture of atmospheric ice crystal behavior has been revealed through both laboratory studies (Bailey and Hallett, hereafter BH02 and BH04) and field observations utilizing the Spec.

Inc. CPI (Lawson et al. ), a nonimpacting cloud particle has been confirmed with observations made during the Second Alliance Icing Research Study (AIRS II.

Discussed are the results of studying the variations of atmospheric electricity in the areas of oil deposits and underground gas storages. Measurements were carried out in different regions of Russia, Belarus, and Kazakhstan.

Atmospheric scientists conduct field experiment to study wind flow over complex mountain terrain. Credit: Perdigão Experimental Group. Download the high-resolution JPG version of the image. ( MB) Use your mouse to right-click (Mac users may need to Ctrl-click) the link above and choose the option that will save the file or target to.

In this study, an atmospheric pressure air plasma was generated using a radio-frequency inductively coupled plasma torch, and optical diagnostics were developed to measure the thermodynamic state. This paper describes new algorithms, not previously available, for predicting atmospheric absorption of sound at high altitudes.

A basis for estimating atmospheric absorption up to km is described. The estimated values at altitudes above 90 km must be considered as only approximate due to uncertainties about the composition of the atmosphere above 90 km and simplifying assumptions.

ot tr ot-itsrr 4 an experimental study of the atmospheric conditions conducive to high radio fields 9/1/ ot-its ot-itsm 6 review of radiation characteristics of the l trailing wire antenna 10/1/ ot-its ot-itstm 30 backscatter studies and 3-day ray tracing quarterly report 10/1/   The interpretation of this variability as atmospheric Rossby waves (Sivjee et al., ; Williams & Avery, ) and the evidence of commensurate variability in near surface behavior (Madden, ) provided the theoretical framework in which the lower atmosphere can be coupled with the upper atmosphere: these oscillations are related to the.

Middle Atmosphere Co-operation/Summer in Northern Europe (MAC/SINE) studied the general circulation and temperature structure as well as waves, turbulence and winds in high latitudes during summer solstice conditions.

The experiments comprised a series of regular meteorological rocket firings and ground-based observations as well as four launches of sounding rockets. Study of Electric Field Changes Accompanied by Atmospheric Radio Noise at 10 kHz at Mexico Valley Oscar Troncoso-Lozada Centro de Ciencias de la Atm&sfera, Universidad Nacional Aut6noma de México, México, D.F.

(recibido el 30 de octubre de ; aceptado el 8de abril de ) Abstract. In the last years we are involved in an elfort to de. We do not guarantee individual replies due to extremely high volume of correspondence.

E-mail the story Atmospheric scientists conduct field experiment to study. Atmospheric chemists study atmospheric components, reactions, measurement techniques, and processes. They study climates and gases, chemical reactions that occur in clouds, and ultraviolet radiation. Atmospheric physicists and dynamists study the physical movements and interactions that occur in the atmosphere.

from those measured during fair-weather conditions. Using a simple two-layer model for the atmo-spheric electric eld, these patterns can be well reproduced by state of the art simulation codes. This in turn provides a novel way to study atmospheric electric elds.

PACS numbers: Ry, Pw, sd Keywords: cosmic rays; thunderstorms. Proc. SPIE25th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, (18 December ); doi: /.

The main research progress of atmospheric physics and atmospheric environment in the past 40 years of reform and opening-up was reviewed, the outstanding research achievements since the 21st.A Comparative Study of the Rates of Development of Potential Graupel and Hail Embryos in High Plains Storms Andrew J.

Heymsfield Published online on 1 December, from those measured during fair-weather conditions. With the use of a simple two-layer model for the atmospheric electric eld, these patterns can be well reproduced by state-of-the-art simulation codes. This in turn provides a novel way to study atmospheric electric elds.

PACS numbers: Pw, Ry, sd Keywords: cosmic rays.