Results 91 to 100 of about 446 (185)

The Potential for Observing African Weather with GNSS Remote Sensing

Advances in Meteorology, 2015
When compared to the wide range of atmospheric sensing techniques, global navigation satellite system (GNSS) offers the advantage of operating under all weather conditions, is continuous, with high temporal and spatial resolution and high accuracy, and ...
Olalekan A. Isioye, Ludwig Combrinck, Joel O. Botai, Cilence Munghemezulu   +3 more
doaj   +1 more source

One‐Dimensional Variational Ionospheric Retrieval Using Radio Occultation Bending Angles: 1. Theory

Space Weather
A new one‐dimensional variational (1D‐Var) retrieval method for ionospheric GNSS radio occultation (GNSS‐RO) measurements is described. The forward model implicit in the retrieval calculates the bending angles produced by a one‐dimensional ionospheric ...
I. D. Culverwell, S. B. Healy, S. Elvidge   +2 more
doaj   +1 more source

Estimativa e análise de perfis de densidade de elétrons para a região brasileira: integração de informações provenientes de rádio ocultação e de estações terrestres GNSS

Revista Cartográfica
A rádio ocultação (RO) é utilizada há mais de seis décadas para a sondagem da atmosfera de outros planetas. O advento dos Sistemas Globais de Navegação por Satélite (GNSS) e das missões com satélites de baixa órbita, permitiram novas possibilidades de ...
Gabriel Oliveira Jerez, Daniele Barroca Marra Alves, Manuel Hernández-Pajares, João Francisco Galera Monico   +3 more
doaj   +1 more source

Quality Assessment of YUNYAO GNSS-RO Refractivity Data in the Neutral Atmosphere

Abstract. GNSS (Global Navigation Satellite System) Radio Occultation (RO) data is an important component of numerical weather prediction (NWP) systems. To incorporate more GNSS RO data into NWP systems, commercial RO data has become an excellent option. Tianjin Yunyao Aerospace Technology Co., Ltd.
Xiaoze Xu, Wei Han, Jincheng Wang, Zhiqiu Gao, Fenghui Li, Yan Cheng, Naifeng Fu   +6 more
openaire   +2 more sources

Prospects for meteotsunami detection in earth's atmosphere using GNSS observations. [PDF]

GPS Solut, 2023
Vergados P, Krishnamoorthy S, Martire L, Mrak S, Komjáthy A, Morton YTJ, Vilibić I.   +6 more
europepmc   +1 more source

A Novel Sampling Approach in GNSS-RO Receivers with Open Loop Tracking Method

AUT Journal of Electrical Engineering, 2019
Propagation of radio occultation (RO) signals through the lower troposphere results in high phase acceleration and low signal to noise ratio signal. The excess Doppler estimation accuracy in lower troposphere is very important in receiving RO signals which can be estimated by sliding window spectral analysis.
openaire   +2 more sources

Overview of Space-Capable Global Navigation Satellite Systems Receivers: Heritage, Status and the Trend towards Miniaturization. [PDF]

Sensors (Basel), 2023
Gill E, Morton J, Axelrad P, Akos DM, Centrella M, Speretta S.   +5 more
europepmc   +1 more source

Analyzing GNSS-RO Derived Ionospheric Intensity Scintillation Preceding Earthquakes in the Coral Sea During 2022

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The work of B.-E. Boudriki-Semlali was supported by an FI Grant: 2021 FI_B 00471 from FIAGAUR 2021. This work was supported in part by project “GENESIS: GNSS Environmental and Societal Missions- Subproject UPC” under Grant PID2021-126436OB-C21 sponsored by the Ministerio de Ciencia e Investigación (MCIN)/Agencia Estatal de Investigación(AEI)/10.13039 ...
Mireia Carvajal-Librado, Carlos Molina, Badr-Eddine Boudriki Semali, Hyuk Park, Adriano Camps   +4 more
openaire   +4 more sources

Resolving the 21st century temperature trends of the upper troposphere-lower stratosphere with satellite observations. [PDF]

Sci Rep, 2023
Ladstädter F, Steiner AK, Gleisner H.
europepmc   +1 more source

Real-Time Cycle Slip Detection in Single-Frequency GNSS Receivers Using Dual-Index Cross-Validation and Elevation-Dependent Thresholding. [PDF]

Sensors (Basel)
Carvajal Librado M, Park KD.
europepmc   +1 more source