Results 1 to 10 of about 710,395 (248)

COSMIC-2 RO Profile Ending at PBL Top With Strong Vertical Gradient of Refractivity

Remote Sensing, 2022
The Formosa Satellite-7/Constellation Observing System for Meteorology, Ionosphere, and Climate-2 (Satellite-7/COSMIC-2), which was successfully launched on 25 June 2019, provides dense radio occultation (RO) observations over the tropics and subtropics.
Xu Xu, Xiaolei Zou
exaly   +4 more sources

Comparative Study on Radio Refractivity Gradient in the Troposphere Using Chaotic Quantifiers [PDF]

Heliyon, 2019
Complexity and nonlinear trend in the internal activities of the troposphere has been a great factor affecting the transmission and receiving of good quality of signals globally.
Joseph Sunday Ojo, Ozuem Edward, J S Ojo
exaly   +4 more sources

A Modified Radiopropagation Multipath Model for Constant Refractivity Gradient Profiles [PDF]

Journal of Microwaves, Optoelectronics and Electromagnetic Applications, 2023
This paper presents a radiopropagation algorithm based on a Ray Tracing (RT) technique that combines a modified multipath model for constant refractivity gradient profiles and the Uniform Theory of Diffraction (UTD).
D. Parada, C. G. Rego, D. Guevara, A. Navarro, G. L. Ramos, R. Oliveira   +5 more
doaj   +3 more sources

Evaluation of Daily Tropospheric Radio Refractivity, Refractivity Gradient and Geoclimatic Factor Over Otukpo, Benue State, Nigeria

African Scientific Reports
Radio refractivity is a key parameter for reliable terrestrial microwave-link design because the tropospheric propagation of radio waves is strongly affected by atmospheric refractive properties.
Emmanuel Daniel Onoja, Andrew Ichoja, Anthony Odeh Ejila, Majesty Oche Omikpa, Emmanuel Vezua Tikyaa, Elijah E. Onwoke, Jack Zuhumnan Kevin   +6 more
exaly   +3 more sources

Performance Analysis of Tropospheric Radio Refractivity Along With Refractivity Gradient and Effective Earth Radius in the Coastal Zone of Nigeria

UMYU Scientifica
Radio refractivity is the ratio of the velocity of radio waves in a specific medium to that in free space.  Radio waves propagate according to variations in tropospheric radio refractive index.
Gazali Bello
exaly   +3 more sources

Tropical Cyclone Planetary Boundary Layer Heights Derived from GPS Radio Occultation over the Western Pacific Ocean

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

Study of Seasonal Surface Refractivity over NorthCentral Nigeria [PDF]

Physics Access, 2021
Tropospheric radio wave signals experience loss due to multipath effect, scattering and other forms of attenuation through the atmospheric medium, primarily due to variations in weather conditions with time.
Muhammad B Ladan, Oyedum O David, Jibrin A Yabagi, Ndanusa Babakacha, Mohammed I Kimpa, Mohammed Z Doko, Abdullahi A Saba, Umar Sadiq, Franscious Cummings   +8 more
doaj   +1 more source

Estimation of radio refractivity from satellite-derived meteorological data over a decade for West Africa

Scientific African, 2021
Radio refractivity, which is the bending of a radio signal as it propagates through media, is very important in works involving terrestrial atmospheric electromagnetic propagation such as point-to-point microwave communication, terrestrial radio and ...
O.J. Abimbola, S.O. Bada, A.O. Falaiye, Y.M. Sukam, M.S. Otto, S. Muhammad   +5 more
doaj   +1 more source

Raytracing Simulated GPS Radio Wave Propagation Paths Experiencing Large Disturbances When Going through the Top of the Sub-Cloud Layer

Remote Sensing, 2021
Global positioning satellite system (GPS) radio waves that reach the tropical lower troposphere are strongly affected by small-scale water vapor fluctuations.
Shengpeng Yang, Xiaolei Zou, Richard Anthes   +2 more
doaj   +1 more source

Investigation of Point Refractivity Gradient and Geoclimatic Factor at 70 m Altitude in Yenagoa, Nigeria

Journal of Nigerian Society of Physical Sciences, 2023
The quality of services provided via Inter-Terrestrial radio communication links such as GSM networks, Wide Area Network (WAN), Radio and TV broadcasts is largely influenced by some meteorological parameters such as temperature, pressure and humidity ...
Y. B. Lawal, E. T. Omotoso
doaj   +1 more source