Results 21 to 30 of about 467 (182)

Effect of GNSS RO on prediction of the 2021 Henan Rainstorm

, 2022
Abstract Precise prediction of the extremely heavy rainstorm is still challenging due to less or low spatial-temporal measurements. Nowadays, space-borne Global Navigation Satellite System (GNSS) radio occultation (RO) provides high spatial-resolution atmospheric parameters, which may improve the prediction precision of heavy rainfalls. In this
Yu Wang, Shuanggen Jin
openaire   +1 more source

Improved models for estimating sporadic-E intensity from GNSS radio occultation measurements

Frontiers in Astronomy and Space Sciences, 2023
Several models for estimating sporadic-E intensity from Global Navigation Satellite System (GNSS) radio occultation (RO) observation have previously been developed using a single perturbation or intensity parameter, such as phase-based total electron ...
Daniel J. Emmons, Dong L. Wu, Nimalan Swarnalingam, Nimalan Swarnalingam, Ashar F. Ali, Joseph A. Ellis, Kyle E. Fitch, Kenneth S. Obenberger   +7 more
doaj   +1 more source

Rádio Ocultação GNSS: Revisão Teórica, Missões e Produtos

Revista Brasileira de Cartografia, 2022
A rádio ocultação (RO) começou a ser utilizada para a sondagem da atmosfera de outros planetas a partir da década de 1960. Com o desenvolvimento do Global Navigation Satellite System (GNSS) e de missões com satélites de baixa órbita (Low Earth Orbit ...
Gabriel Oliveira Jerez, Daniele Barroca Marra Alves, Raphael Silva Nespolo, João Francisco Galera Monico, Manuel Hernández-Pajares   +4 more
doaj   +1 more source

The 2021 La Palma volcanic eruption and its impact on ionospheric scintillation as measured from GNSS reference stations, GNSS-R and GNSS-RO

Natural Hazards and Earth System Sciences, 2023
Abstract. Ionospheric disturbances induced by seismic activity have been studied in recent years by many authors, showing an impact both before and after the occurrence of earthquakes. In this study, the ionospheric scintillation produced by the 2021 La Palma volcano eruption is analyzed.
C. Molina, B.-E. Boudriki Semlali, G. González-Casado, H. Park, H. Park, A. Camps, A. Camps, A. Camps   +7 more
openaire   +5 more sources

GNSS Radio Occultation in Advanced Numerical Weather Prediction Models

GEOmedia, 2019
GPS-Radio Occultation (GPS-RO), and generally, Global Navigation Satellite System Radio Occultation (GNSS-RO), is a technique that measures the refractivity of the Earth's atmosphere as a Low Earth Orbit (LEO) satellite listens to the radio signal of a ...
Guillermo Bosch
doaj   +3 more sources

GNSS radio occultation soundings from commercial off-the-shelf receivers on board balloon platforms [PDF]

Atmospheric Measurement Techniques, 2023
The Global Navigation Satellite System (GNSS) radio occultation (RO) technique has proven to be an effective tool for Earth atmosphere profiling. Traditional spaceborne RO satellite constellations are expensive with relatively low sampling density for ...
K. J. Nelson, K. J. Nelson, F. Xie, B. C. Chan, A. Goel, J. Kosh, T. G. R. Reid, C. R. Snyder, P. M. Tarantino   +8 more
doaj   +1 more source

Quality assessment of YUNYAO radio occultation data in the neutral atmosphere [PDF]

Atmospheric Measurement Techniques
Global Navigation Satellite System (GNSS) radio occultation (RO) data are an important component of numerical weather prediction (NWP) systems. To incorporate more GNSS-RO data into NWP systems, commercial RO data have become an excellent option. Tianjin
X. Xu, W. Han, W. Han, J. Wang, Z. Gao, Z. Gao, F. Li, Y. Cheng, N. Fu, N. Fu   +9 more
doaj   +1 more source

Applications of GNSS-RO to Numerical Weather Prediction and Tropical Cyclone Forecast [PDF]

Atmosphere, 2020
The global navigation satellite system (GNSS) radio occultation (RO) technique is an atmospheric sounding technique that originated in the 1990s. The data provided by this approach are playing a consistently significant role in atmospheric research and related applications.
Weihua Bai, Nan Deng, Yueqiang Sun, Qifei Du, Junming Xia, Xianyi Wang, Xiangguang Meng, Danyang Zhao, Congliang Liu, Guangyuan Tan, Ziyan Liu, Xiaoxu Liu   +11 more
openaire   +2 more sources

Forecast Impact of FORMOSAT‐7/COSMIC‐2 GNSS Radio Occultation Measurements

Atmospheric Science Letters, 2021
The FORMOSAT‐7/COSMIC‐2 GNSS‐RO mission was launched on June 25, 2019, and it has provided a large increase in the number of GNSS‐RO observations available for operational numerical weather prediction (NWP) in the latitude band between ±40°. A key aim of
Benjamin Ruston, Sean Healy
doaj   +1 more source

Evaluation of Geometric and Atmospheric Doppler for GNSS-RO Payloads

AUT Journal of Electrical Engineering, 2016
To reduce the sampling rate in global navigation satellite system (GNSS)-radio occultation receivers, it is essential to establish a suitable estimation of Doppler frequency from the received signal in the satellite onboard receiver. This receiver is usually located on low earth orbit satellite and receives GNSS satellites signal in the occultation ...
L. Mohammadi, S. Amiri, G.R. Mohammadkhani   +2 more
openaire   +2 more sources