Zobrazeno 1 - 10
of 3 221
pro vyhledávání: '"Dong L. Wu"'
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-11 (2024)
Abstract The quasi-2-day wave (Q2DW) is a large temperature disturbance in the austral summer-time mesosphere. Its decay-phase movement and phase-speed are poorly understood. Q2DW events observed by the microwave limb sounder (MLS) onboard the NASA A
Externí odkaz:
https://doaj.org/article/ddc01733cd8a43fcbe4c9d0147efd579
Autor:
Eli V. Parsch, Anthony L. Franz, Eugene V. Dao, Dong L. Wu, Nimalan Swarnalingam, Cornelius C. J. H. Salinas, Daniel J. Emmons
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
Intense ionization enhancements in the Earth’s ionosphere, known as sporadic-E (Es), can degrade and severely disrupt the propagation of radio signals. Although many previous studies have analyzed the characteristics and morphologies of sporadic-E,
Externí odkaz:
https://doaj.org/article/d0da01d1e72f4bd2bd2db546972aea79
Autor:
Dong L. Wu
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 8642-8645 (2024)
The jamming is found to increase significantly in recent years, and its impact is evident in Global Navigation Satellite System (GNSS) radio occultation (RO) measurements, such as those from COSMIC-2. This article presents an algorithm that applies t
Externí odkaz:
https://doaj.org/article/8b2114f786234bd588f383ab1fae6dae
Autor:
Daniel J. Emmons, Dong L. Wu, Nimalan Swarnalingam, Ashar F. Ali, Joseph A. Ellis, Kyle E. Fitch, Kenneth S. Obenberger
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 10 (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
Externí odkaz:
https://doaj.org/article/567f2102457f4a3c92c35e0bbfb0b994
Publikováno v:
Remote Sensing, Vol 16, Iss 9, p 1563 (2024)
Polar mesospheric cloud (PMC) data obtained from the Aeronomy of Ice in the Mesosphere (AIM)/Cloud Imaging and Particle Size (CIPS) experiment and Himawari-8/Advanced Himawari Imager (AHI) observations are analyzed for multi-year climatology and inte
Externí odkaz:
https://doaj.org/article/bbaf5c470d0f4a0196927a7b49b1a4f4
Publikováno v:
Remote Sensing, Vol 16, Iss 7, p 1133 (2024)
Fast atmospheric processes such as deep convection and severe storms are challenging to observe and understand without adequate spatiotemporal sampling. Geostationary (GEO) imaging has the advantage of tracking these fast processes continuously at a
Externí odkaz:
https://doaj.org/article/6d5be21c7a9b40b3a5a1492baf90255c
Publikováno v:
Atmosphere, Vol 14, Iss 11, p 1659 (2023)
Sea ice fraction (SIF) over the Ross/Amundsen/Bellingshausen Sea (RAB) are investigated using the Modern-Era Retrospective Analysis for Research and Application, Version 2 (MERRA-2), focusing on the differences in time-lagged response to ENSO between
Externí odkaz:
https://doaj.org/article/e22913bd34e94e5cb893ae17fa1973b7
Autor:
Dylan J. Shaver, Dong L. Wu, Nimalan Swarnalingam, Anthony L. Franz, Eugene V. Dao, Daniel J. Emmons
Publikováno v:
Remote Sensing, Vol 15, Iss 18, p 4363 (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 a
Externí odkaz:
https://doaj.org/article/8b96e3dc70824a6192c2c8d28b13d519
Publikováno v:
Remote Sensing, Vol 15, Iss 16, p 4048 (2023)
A growing number of SmallSat/CubeSat constellations with high-rate (50–100 Hz) global navigation satellite system radio occultations (GNSS-RO) as well as low-rate (1 Hz) precise orbit determination (GNSS-POD) limb-viewing capabilities provide unpre
Externí odkaz:
https://doaj.org/article/8faa46f9c93747de8351ebf1472e845b
Autor:
Dong L. Wu, Nimalan Swarnalingam, Cornelius Csar Jude H. Salinas, Daniel J. Emmons, Tyler C. Summers, Robert Gardiner-Garden
Publikováno v:
Remote Sensing, Vol 15, Iss 13, p 3245 (2023)
GNSS-LEO radio links from Precise Orbital Determination (POD) and Radio Occultation (RO) antennas have been used increasingly in characterizing the global 3D distribution and variability of ionospheric electron density (Ne). In this study, we develop
Externí odkaz:
https://doaj.org/article/2b546426f89a4b7883022b2d1ebdf141