Results 31 to 40 of about 447 (167)

A simplified approach for generating GNSS radio occultation refractivity climatologies [PDF]

Atmospheric Measurement Techniques, 2013
The possibility of simplifying the retrieval scheme required to produce GNSS radio occultation refractivity climatologies is investigated. In a new, simplified retrieval approach, the main statistical analysis is performed in bending angle space and an ...
H. Gleisner, S. B. Healy
doaj   +1 more source

Analysis of reflections in GNSS radio occultation measurements using the phase matching amplitude [PDF]

Atmospheric Measurement Techniques, 2018
It is well-known that in the presence of super-refractive layers in the lower-tropospheric inversion of GNSS radio occultation (RO) measurements using the Abel transform yields biased refractivity profiles. As such it is problematic to reconstruct the
T. Sievert, J. Rasch, A. Carlström, M. I. Pettersson   +3 more
doaj   +1 more source

Global tropopause height determination using GNSS radio occultation

Egyptian Journal of Remote Sensing and Space Sciences, 2023
The tropopause layer is a crucial stratum of the earth's atmosphere that attracts more interest from climate and atmospheric researchers. The observables of the global navigation satellite system (GNSS) allow for continuous and long-term research of the ...
Mohamed Zhran, Ashraf Mousa
doaj   +1 more source

Monitoring global climate change using GNSS radio occultation

npj Climate and Atmospheric Science, 2022
The emerging signal of climate change is now clearly evident in Global Navigation Satellite System (GNSS) radio occultation (RO) data, matching predictions made by climate models 15 years ago. The observed RO trends represent well-understood responses to
Hans Gleisner, Mark A. Ringer, Sean B. Healy   +2 more
doaj   +1 more source

Advances in Ionospheric Space Weather by Using FORMOSAT-7/COSMIC-2 GNSS Radio Occultations

Atmosphere, 2022
This paper provides an overview of the contributions of the space-based global navigation satellite system (GNSS) radio occultation (RO) measurements from the FORMOSAT-7/COSMIC2 (F7/C2) mission in advancing our understanding of ionospheric plasma physics
Jann-Yenq Liu, Chien-Hung Lin, Panthalingal Krishnanunni Rajesh, Chi-Yen Lin, Fu-Yuan Chang, I-Te Lee, Tzu-Wei Fang, Dominic Fuller-Rowell, Shih-Ping Chen   +8 more
doaj   +1 more source

GNSS Radio Occultation Constellation Observing System Experiments

Monthly Weather Review, 2014
Abstract Observing system experiments within the operational ECMWF data assimilation framework have been performed for summer 2008 when the largest recorded number of Global Navigation Satellite System (GNSS) radio occultation observations from both operational and experimental satellites were available.
Bauer, Peter, Radnóti, G., Healy, Sean, Cardinali, Carla   +3 more
openaire   +1 more source

Commercial GNSS Radio Occultation on Aerial Platforms With Off-The-Shelf Receivers

Navigation, 2022
In recent decades, GNSS radio occultation (RO) soundings have proven to be an invaluable input to global weather forecasting. The success of government programs such as COSMIC is now complemented by commercial low-cost cubesats.
Bryan C. Chan, Ashish Goel, Jonathan Kosh, Tyler G. R. Reid, Corey R. Snyder, Paul M. Tarantino, Saraswati Soedarmadji, Widyadewi Soedarmadji, Kevin Nelson, Feiqin Xie, Michael Vergalla   +10 more
doaj   +1 more source

Ionospheric bending correction for GNSS radio occultation signals [PDF]

Radio Science, 2011
Ionospheric propagation effects on Global Navigation Satellite Systems (GNSS) signals are the most pronounced during radio occultation due to long ionospheric travel paths of the received signal on low Earth orbiting satellites. Inhomogeneous plasma distribution and anisotropy cause higher‐order nonlinear refraction effects on GNSS signals which cannot
Hoque, Mohammed Mainul, Jakowski, Norbert   +1 more
openaire   +2 more sources

FY3E GNOS II GNSS Reflectometry: Mission Review and First Results

Remote Sensing, 2022
FengYun-3E (FY3E), launched on 5 July 2021, is one of China’s polar-orbiting meteorological satellite series. The GNOS II onboard FY3E is an operational GNSS remote sensor that for the first time combines GNSS radio occultation (GNSS RO) and GNSS ...
Guanglin Yang, Weihua Bai, Jinsong Wang, Xiuqing Hu, Peng Zhang, Yueqiang Sun, Na Xu, Xiaochun Zhai, Xianjun Xiao, Junming Xia, Feixiong Huang, Cong Yin, Qifei Du, Xianyi Wang, Yuerong Cai, Xiangguang Meng, Guangyuan Tan, Peng Hu, Congliang Liu   +18 more
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“Cookie”: A Satellite Concept for GNSS Remote Sensing Constellations

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2016
This paper presents a concept, “Cookie,” for a satellite particularly suited for dense spatial sampling by future Global Navigation Satellite Systems (GNSS) remote sensing constellations.
Manuel Martin-Neira, Weiqiang Li, Ana Andres-Beivide, Xabier Ballesteros-Sels   +3 more
doaj   +1 more source