Results 31 to 40 of about 420 (173)

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

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

Comparison of a Bottom-Up GNSS Radio Occultation Method to Measure D- and E-Region Electron Densities with Ionosondes and FIRI

Remote Sensing, 2023
High-frequency skywave propagation can be heavily impacted by D- and E-region dynamics requiring accurate global measurements to optimize performance. A standard measurement technique is to use ionosondes, but they are unable to measure below 1 MHz and ...
Dylan J. Shaver, Dong L. Wu, Nimalan Swarnalingam, Anthony L. Franz, Eugene V. Dao, Daniel J. Emmons   +5 more
doaj   +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

Sensing Heavy Precipitation With GNSS Polarimetric Radio Occultations [PDF]

Geophysical Research Letters, 2019
AbstractThis study presents, for the first time ever, occulting signals of the Global Navigation Satellite Systems (GNSSs) acquired at two polarizations from a Low Earth Orbiter, and it shows that they sense heavy precipitation. The data sets are obtained from early stages of the Radio Occultation and Heavy Precipitation experiment aboard the PAZ ...
E. Cardellach, S. Oliveras, A. Rius, S. Tomás, C. O. Ao, G. W. Franklin, B. A. Iijima, D. Kuang, T. K. Meehan, R. Padullés, M. de la Torre Juárez, F. J. Turk, D. C. Hunt, W. S. Schreiner, S. V. Sokolovskiy, T. Van Hove, J. P. Weiss, Y. Yoon, Z. Zeng, J. Clapp, W. Xia‐Serafino, F. Cerezo   +21 more
openaire   +1 more source

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
doaj   +1 more source

Determination of Tropical Belt Widening Using Multiple GNSS Radio Occultation Measurements [PDF]

Annales Geophysicae, 2021
Abstract. In the last decades, Global navigation satellite systems (GNSS) have provided an exceptional opportunity to retrieve atmospheric parameters globally through GNSS radio occultation (GNSS-RO). In this paper, data of 12 GNSS-RO missions from June 2001 to November 2020 with high resolution were used to investigate the possible widening of the ...
M. Darrag, M. Darrag, S. Jin, S. Jin, S. Jin, A. Calabia, A. Samy   +6 more
openaire   +3 more sources

“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

An Innovative Signal Processing Scheme for Spaceborne Integrated GNSS Remote Sensors

Remote Sensing, 2023
The vigorous development of the global navigation satellite system (GNSS) has led to a boom in GNSS radio occultation (GNSS RO) and GNSS reflectometry (GNSS-R) techniques.
Tongsheng Qiu, Xianyi Wang, Yueqiang Sun, Fu Li, Zhuoyan Wang, Junming Xia, Qifei Du, Weihua Bai, Yuerong Cai, Dongwei Wang, Cheng Liu, Hao Qiao, Feixiong Huang   +12 more
doaj   +1 more source

Effect of Multiple GNSS Integration on the Number and Spatiotemporal Coverage of Radio Occultation Events

Atmosphere, 2022
The development of global navigation satellite systems (GNSSs) and multi-system compatible radio occultation (RO) techniques provides favorable conditions and opportunities for increasing the number of occultation events and improving their ...
Congliang Liu, Yueqiang Sun, Weihua Bai, Qifei Du, Wei Li, Xi Wang, Peixian Li   +6 more
doaj   +1 more source