Results 51 to 60 of about 1,121 (191)

“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

GNSS Radio Occultation Simulation Using Multiple Phase Screen Orbit Sampling

, 2020
Wave optics propagators (WOPs) are commonlyused to describe the propagation of radio signals through earth’satmosphere. In radio occultation (RO) context, multiple phasescreen (MPS) method has been used to model the effects of theatmosphere in Global ...
Carlström, Anders,, Pettersson, Mats, Rasch, Joel,, Rasch, Joel, Ludwig Barbosa, Vinícius, Ludwig Barbosa, Vinícius,, Vu, Viet Thuy,, Pettersson, Mats,, Carlström, Anders, Vu, Viet Thuy   +9 more
core   +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

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

Height‐Dependent Evolution of the Ionospheric Response to the May 2024 Superstorm: Global GNSS‐POD, GNSS‐RO, and Ground‐Based Observations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract Capturing global ionospheric response during extreme geomagnetic storms remains a major observational challenge. During 10–11 May, 2024 superstorm, we investigate the height‐dependent response of the F‐region using multi‐constellation GNSS‐POD limb‐sounding measurements from COSMIC‐2, Spire, PlanetiQ, and FengYun‐3 satellites. Approximately 12,
Nimalan Swarnalingam, Dong L. Wu, Daniel J. Emmons, Cornelius Csar Jude H. Salinas   +3 more
wiley   +1 more source

Separability of Systematic Effects in Polarimetric GNSS Radio Occultations for Precipitation Sensing [PDF]

IEEE Transactions on Geoscience and Remote Sensing, 2018
The Global Navigation Satellite System (GNSS) polarimetric effects on the propagation of radio occultations (ROs) are studied here. Polarimetric ROs have been suggested as a technique to detect heavy rain events using opportunity signals from GNSS satellites.
Sergio Tomás, Ramon Padullés, Estel Cardellach   +2 more
openaire   +1 more source

Gravity Wave Influences on MSTID Climatology Over CONUS: WACCM‐X Year‐Long Simulation and GNSS Long‐Term Observation

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract Medium‐Scale Traveling Ionospheric Disturbances (MSTIDs) are prominent wave‐like structures in the ionosphere, with complex generation mechanisms involving both atmospheric gravity waves (GWs) and electrodynamic instabilities such as the Perkins instability (PI).
Jing Liu, Shun‐Rong Zhang, Hanli Liu, Anthea J. Coster, Philip J. Erickson   +4 more
wiley   +1 more source

Ionospheric Characterization Over Iran Using Multi‐Frequency IMB HF Transmitters and Global WSPRNET Reception During the 12 November 2025 Geomagnetic Storm

Space Weather, Volume 24, Issue 6, June 2026.
Abstract The Ionospheric Monitoring Beacon network in Iran provides continuous, multi‐frequency high‐frequency (HF) transmissions using WSPRNET modulation, enabling global reception and near–real‐time monitoring of ionospheric propagation conditions.
A. Mahmoudian, Saba Hafizi Lotfabadi, Mohammad Azimi   +2 more
wiley   +1 more source

Ionospheric tilting of 21 August 2017 total solar eclipse sounded by GNSS ground-based receivers and radio occultation

Terrestrial, Atmospheric and Oceanic Sciences, 2021
A total solar eclipse passed over the continental United States from the west to the east coast on 21 August 2017. Measurements made by more than 2200 groundbased GNSS (Global Navigation Satellite System) receivers observed a significant decrease in ...
Chi-Yen Lin, Jann-Yenq Liu, Yang-Yi Sun, Charles Chien-Hung Lin, Loren C. Chang, Chao-Yen Chen, Chia-Hung Chen   +6 more
doaj   +1 more source

Using A Sliding Window Phase Matching Method for Imaging of GNSS Radio Occultation Signals

Remote Sensing, 2021
Global Navigation Satellite System Radio Occultation (GNSS-RO) is a technique used to sound the atmosphere and derive vertical profiles of refractivity.
Thomas Sievert, Joel Rasch, Anders Carlström, Vinícius Ludwig Barbosa, Mats I. Pettersson, Viet Vu   +5 more
doaj   +1 more source