Results 81 to 90 of about 333,204 (200)

The opposition and tilt effects of Saturn's rings from HST observations

, 2010
The two major factors contributing to the opposition brightening of Saturn's rings are i) the intrinsic brightening of particles due to coherent backscattering and/or shadow-hiding on their surfaces, and ii) the reduced interparticle shadowing.
French, Richard G., Salo, Heikki
core   +1 more source

Research on the Ionospheric Delay of Long-Range Short-Wave Propagation Based on a Regression Analysis

Remote Sensing
The ionospheric delay effect is inevitable when a radio signal propagates through the ionosphere. It has been extensively studied in the L-band. Typically, the influence of the ionosphere on the code phase and carrier phase is regarded as the same.
Xiaoli Jiang, Huimin Li, Lixin Guo, Dalin Ye, Kehu Yang, Jiawen Li   +5 more
doaj   +1 more source

The impact of solar elevation angle on the net radiative effect of tropical cyclone clouds

npj Climate and Atmospheric Science
In this study solar elevation angle is shown to have a dominant impact on the net radiation due to tropical cyclone (TC) clouds. As solar elevation angle increases, net cooling effects from TC clouds dominate over net warming effects.
Liang Hu, Dae-Hui Kim, J. Scott Tyo, Elizabeth A. Ritchie   +3 more
doaj   +1 more source

Rates of solar angles for two-axis concentrators [PDF]

The Sun's position by the azimuth and elevation angles and its rate of change at any time of day are determined to design 2 axis tracking mechanisms of solar concentrators.
Lansing, F. L., Yung, C. S.
core   +1 more source

3-D Statistical Channel Model for Millimeter-Wave Outdoor Mobile Broadband Communications

, 2015
This paper presents an omnidirectional spatial and temporal 3-dimensional statistical channel model for 28 GHz dense urban non-line of sight environments.
Rappaport, Theodore S., Samimi, Mathew K.   +1 more
core   +1 more source

Performance Analysis for Elevation Angle Dependent Time-Varying Land Mobile Satellite Channel Model

IEEE Access
The main goal of this study is to address how a change in the signal envelope due to the random occurrence of the elevation angle affects the ground-to-satellite or satellite-to-ground link performance in Low Earth Orbit (LEO) satellite communication ...
Eser Gemikonakli, Huseyin Gokal, Tolgay Karanfiller   +2 more
doaj   +1 more source

Effects of sex differences on scapular motion during arm elevation

SICOT-J, 2015
Introduction: Scapular motion during arm elevation is frequently evaluated in patients with shoulder disorders because it provides clinically useful information.
Nagamatsu Takashi, Kai Yoshihiro, Gotoh Masafumi, Madokoro Kazuya, Shiba Naoto   +4 more
doaj   +1 more source

The Ayushman Angle Framework: Elevating Angle to a Dimensional Quantity

This is an original physics framework paper introducing the Ayushman Constant for redefining Angle as a base dimension.  It is made available for public and academic discussion. 
openaire   +1 more source

Investigations of the ionospheric using radio signals from artificial satellites [PDF]

The occurrence and characteristics of ionospheric irregularities in medium latitudes and in polar regions were measured using radio signals from artificial satellites. Ionospheric changes during quiet and disturbed conditions were also measured. Electron
Titheridge, J. E.
core   +1 more source

Conical scan tracking system employing a large antenna [PDF]

, 1978
A conical scan tracking system for tracking spacecraft and distant radio sources is described. The system detects small sinusoidal modulation in received power from a source that is off target with a frequency equal to a very low scan rate, an amplitude ...
Ohlson, J. E., Reid, M. S.
core   +1 more source