Results 21 to 30 of about 6,842 (303)
IEEE Access, 2020 The meteorological parameters review the impact of refractivity on received signal strength for the one-fourth kilometre square area is confer for frequency 1800 to 1900 MHz.
Sayyed Shahid Hussain +5 more
doaj +1 more source
A modified artificial neural network based prediction technique for tropospheric radio refractivity. [PDF]
PLoS ONE, 2018 Radio refractivity plays a significant role in the development and design of radio systems for attaining the best level of performance. Refractivity in the troposphere is one of the features affecting electromagnetic waves, and hence the communication ...
Shumaila Javeed +4 more
doaj +1 more source
Refraction problems after refractive surgery
Survey of Ophthalmology, 1988 While refractive surgery such as radial keratotomy, epikeratophakia, and corneal relaxing incisions offer many potential benefits to patients, they can also generate optical problems such as overcorrection or undercorrection of the prior refractive error and variable vision.
Dean McGee Eye Institute, University of Oklahoma, Oklahoma City, Oklahoma, USA ( host institution ) +2 more
openaire +3 more sources
Evaluation of GNSS Radio Occultation Profiles in the Vicinity of Atmospheric Rivers
Atmosphere, 2022 Increasing the density of Global Navigation Satellite System radio occultation (RO) with commercial Smallsats and the next generation COSMIC-2 constellation is expected to improve analyses of the state of atmosphere, which is essential for numerical ...
Michael J. Murphy, Jennifer S. Haase
doaj +1 more source
Diurnal Variation of Surface Radio Refractivity over Sokoto, North-western Nigeria [PDF]
Physics Access, 2021 The knowledge of good refractivity profile is vital for proper planning of terrestrial communication links; surface refractivity profile of a station is particularly required for enhanced planning and prediction of performance of terrestrial radio links ...
Mohammed Z Doko +6 more
doaj +1 more source
Development and evaluation of airborne microwave refractometer for studies on atmospheric tropical boundary layer radiorefractive index [PDF]
Annales Geophysicae, 1994 Observations of high-resolution data on radio refractivity were obtained by the airborne microwave refractometer over the Indian sub-continent (a tropical country) from 1971 to 1988. Detailed vertical and horizontal distributions of radio refractivity
S. B. S. S. Sarma, B. M. Reddy
doaj +1 more source
Long-Term Characterization of Vertical Radio Refractivity Gradients and Tropospheric Propagation Conditions over North-Central Nigeria Using ERA5 Reanalysis Data [PDF]
Physics AccessThis study presents a comprehensive long-term evaluation of vertical radio refractivity and refractivity gradients over selected locations in North-Central Nigeria.
Usman S Lami +11 more
doaj +1 more source
Remote Sensing, 2021 The radio occultation technique provides stable atmospheric measurements that can work as a benchmark for calibrating and validating satellite-sounding data.
Loknath Adhikari +2 more
doaj +1 more source
Remote Sensing, 2022 According to GPS radio occultation data from previous studies, the height of the planetary boundary layer (PBLH) is defined as the altitude at which the vertical gradient of refractivity N is at its local minimum, called the gradient approach.
Li Wang, Shengpeng Yang, Lin Lin
doaj +1 more source
Seasonal and latitudinal variations of surface radio refractivity over Nigeria
, 2022 Refractivity is a significant challenge of radio signal propagation. As it often distorts or leads to loss of signals. The seasonal and latitudinal variations of surface refractivity at three Nigerian tropospheric Observatory stations in Nigeria, namely ...
Eunice, Sanyaolu Modupe +2 more
core +1 more source