Results 21 to 30 of about 86,460 (309)

Oceanographic and underwater acoustics research : conducted during the period 1 November 1960 - 30 April 1961 [PDF]

open access: yes, 1961
Digital computing techniques have been used in special computing applications in underwater acoustics at WHOI for many years, but recently we have commenced intensive application of digital data handling and computing facilities to a variety of computing,
Woods Hole Oceanographic Institution, /
core   +1 more source

Dense multipath component polarization and wall attenuation at 1.35 GHz in an office environment [PDF]

open access: yes, 2018
This paper presents an analysis of dense multipath components in office meeting rooms. Radio channel sounding measurements at 1.35 GHz were performed with transmitter and receiver in the same room (intra-room) and in adjacent rooms (inter-room). Specular
Bellekens, Ben   +11 more
core   +1 more source

The Multifractal Structure of Small-Scale Artificial Ionospheric Turbulence

open access: yesOpen Astronomy, 2013
We present the results of investigation of a multifractal structure of the artificial ionospheric turbulence when the midlatitude ionosphere is affected by high-power radio waves.
Vybornov F. I., Rakhlin A. V.
doaj   +1 more source

Radio occultation techniques for probing the ionosphere

open access: yesAnnals of Geophysics, 2004
GPS radio occultation measurements establish the basis for a new remote sensing technique for vertical profile information on the electron density of the entire ionosphere from satellite orbit heights down to the bottomside.
M. Angling, R. Leitinger, N. Jakowski
doaj   +1 more source

Application of Beamforming Technology in Ionospheric Oblique Backscatter Sounding with a Miniaturized L-Array

open access: yesRemote Sensing, 2020
In this paper, a new dedicated multi-channel ionospheric oblique backscatter sounder is described. A miniaturized L-shaped antenna array was employed for the receiving of the oblique backscatter echoes in the present system. Firstly, two typical adaptive
Tongxin Liu   +4 more
doaj   +1 more source

Microwave spectroscopy of the Mars atmosphere [PDF]

open access: yes, 1995
A study of the use of millimeter-wavelength spectral transitions to investigate the atmosphere of Mars is presented. In the model experiments investigated it is assumed that a spectrometer in the frequency range from 100 to 260 GHz looks into a modest ...
Clancy, R. T., Muhleman, D. O.
core   +1 more source

Propagation of gravity waves and spread F in the low-latitude ionosphere over Tucumán, Argentina, by continuous Doppler sounding: first results [PDF]

open access: yes, 2014
Results of systematic analysis of propagation directions and horizontal velocities of gravity waves (GWs) and spread F structures in low-latitude ionosphere (magnetic inclination ~27°) in Tucumán region, Argentina, are presented.
Baše, J.   +12 more
core   +2 more sources

Determination and climatology of the planetary boundary layer height above the Swiss plateau by in situ and remote sensing measurements as well as by the COSMO-2 model [PDF]

open access: yesAtmospheric Chemistry and Physics, 2014
The planetary boundary layer (PBL) height is a key parameter in air quality control and pollutant dispersion. The PBL height cannot, however, be directly measured, and its estimation relies on the analysis of the vertical profiles of the temperature ...
M. Collaud Coen   +5 more
doaj   +1 more source

Long-distance HF radio waves propagation during the April 2023 geomagnetic storm by measurements in Antarctica, in Europe, and aboard RV Noosfera

open access: yesУкраїнський антарктичний журнал, 2023
The paper aims at an experimental study of the mechanisms of long-distance high-frequency (HF) propagation and spatial and temporal variations of the ionospheric parameters during the first hours of a severe geomagnetic storm of April 23, 2023 by ...
A. Zalizovski   +11 more
doaj   +1 more source

Age estimates of isochronous reflection horizons by combining ice core, survey, and synthetic radar data. [PDF]

open access: yes, 2004
Ice core records and ice-penetrating radar data contain complementary information on glacial subsurface structure and composition, providing various opportunities for interpreting past and present environmental conditions.
Eisen, Olaf   +3 more
core   +1 more source

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