Results 221 to 230 of about 1,130 (254)

Improvement of Reflection Detection Success Rate of GNSS RO Measurements Using Artificial Neural Network

IEEE Transactions on Geoscience and Remote Sensing, 2018
Global Navigation Satellite System (GNSS) radio occultation (RO) has been widely used in the prediction of weather, climate, and space weather, particularly in the area of tropospheric analyses. However, one of the issues with GNSS RO measurements is that they are interfered with by the signals reflected from the earth’s surface.
Andong Hu, Suqin Wu, Xiaoming Wang, Yan Wang, Robert Norman, Changyong He, Han Cai, Kefei Zhang   +7 more
openaire   +1 more source

Variations of Kelvin Waves around the Tropical Tropopause Inversion Layer from GNSS RO Measurements

Journal of the Atmospheric Sciences
Abstract In the present study, the tropical tropopause inversion layer (TIL) Kelvin waves are extracted from the Global Navigation Satellite System (GNSS) radio occultation (RO) temperature data of multiple missions from January 2007 to December 2020.
Jiahua Li, Xiaohua Xu, Jia Luo
openaire   +1 more source

Data Assimilation Impact of GNSS RO Measurements from Cube Satellites on Arctic Weather Forecasts

Monthly Weather Review
Abstract In this study, the effects of assimilating Global Navigation Satellite System (GNSS) radio occultation (RO) observations from existing and recently added commercial cube satellites on analyses and forecasts over the Arctic region were investigated by conducting observing system experiments (OSEs). Profiles of refractivity were assimilated with
Yonghan Choi, Joowan Kim, Joo-Hong Kim, Dong-Hyun Cha   +3 more
openaire   +1 more source

Final Technical Note of 'Impact assessment of commercial GNSS-RO data'

2021
Lonitz, Katrin, Marquardt, C., Bowler, Neill, Healy, Sean   +3 more
openaire   +1 more source

Neural network recognition of ionospheric anomaly events based on GNSS RO data

2021 13th International Symposium on Antennas, Propagation and EM Theory (ISAPE), 2021
Zhengzheng Ma, Bin Xu, Yali Ren
openaire   +1 more source

Comparison of reference upper-air GRUAN and homogenized RHARM data with GNSS-RO

The study of thermodynamical variables, such as temperature and relative humidity in the upper troposphere/lower stratosphere (UT/LS), is one of the key elements for the study of climate change. Several studies estimated trends both regionally and globally in the UT/LS, using both satellite and ground-based data and different measurement techniques ...
Fabrizio Marra, Emanuele Tramutola, Ilaria Gandolfi, Gessica Cosimato, Marco Rosoldi, Fabio Madonna   +5 more
openaire   +1 more source

GPS Single-Frequency: From First cm-POD to Single Frequency GNSS-RO/R

2018
In this section we introduce what we call “Positive Code-Phase” linear combination or the LP linear combination (phase and code added) to eliminate the first-order ionosphere effect and estimate LEO orbits using single-frequency GPS measurements, (see Svehla and Rothacher 2003a; 2005b).
openaire   +1 more source

GNSS reflectometry global ocean wind speed using deep learning: Development and assessment of CyGNSSnet

Remote Sensing of Environment, 2022
Milad Asgarimehr, Caroline Arnold, Tobias Weigel   +2 more
exaly  

A new method to calibrate residual ionospheric error of GNSS RO bending angle

GPS Solutions, 2022
Mingzhe Li, Xinan Yue, Weixing Wan
openaire   +1 more source

A Review on Multi-GNSS for Earth Observation and Emerging Applications

Remote Sensing, 2022
Shuanggen Jin, Qisheng Wang, Gino Dardanelli   +2 more
exaly