Results 21 to 30 of about 136 (136)

Solar flares as proxy for the young Sun: satellite observed thermosphere response to an X17.2 flare of Earth's upper atmosphere [PDF]

Annales Geophysicae, 2012
We analyzed the measured thermospheric response of an extreme solar X17.2 flare that irradiated the Earth's upper atmosphere during the so-called Halloween events in late October/early November 2003.
S. Krauss, B. Fichtinger, H. Lammer, W. Hausleitner, Yu. N. Kulikov, I. Ribas, V. I. Shematovich, D. Bisikalo, H. I. M. Lichtenegger, T. V. Zaqarashvili, M. L. Khodachenko, A. Hanslmeier   +11 more
doaj   +1 more source

A New Algorithm for the Retrieval of Atmospheric Profiles from GNSS Radio Occultation Data in Moist Air and Comparison to 1DVar Retrievals

Remote Sensing, 2019
The Global Navigation Satellite System (GNSS) Radio Occultation (RO) is a key technique for obtaining thermodynamic profiles of temperature, humidity, pressure, and density in the Earth’s troposphere.
Ying Li, Gottfried Kirchengast, Barbara Scherllin-Pirscher, Marc Schwaerz, Johannes K. Nielsen, Shu-peng Ho, Yun-bin Yuan   +6 more
doaj   +1 more source

Evaluation of the Homogenization Adjustments Applied to European Temperature Records in the Global Historical Climatology Network Dataset

Atmosphere, 2022
The widely used Global Historical Climatology Network (GHCN) monthly temperature dataset is available in two formats—non-homogenized and homogenized.
Peter O’Neill, Ronan Connolly, Michael Connolly, Willie Soon, Barbara Chimani, Marcel Crok, Rob de Vos, Hermann Harde, Peter Kajaba, Peter Nojarov, Rajmund Przybylak, Dubravka Rasol, Oleg Skrynyk, Olesya Skrynyk, Petr Štěpánek, Agnieszka Wypych, Pavel Zahradníček   +16 more
doaj   +1 more source

Analyzing the Contribution of Bare Soil Surfaces to Resuspended Particulate Matter in Urban Areas via Machine Learning

Applied Sciences
Particulate matter (PM) pollution is high in most Bulgarian regions, especially large urban areas. In a previous study covering one year of data collection and analysis by source apportionment techniques such as positive matrix factorization we show that
Danail Brezov, Reneta Dimitrova, Angel Burov, Lyuba Dimova, Petya Angelova-Koevska, Stoyan Georgiev, Elena Hristova   +6 more
doaj   +1 more source

Preface: Earth Observations for Addressing Global Challenges

Remote Sensing, 2020
As climate change has been of great concern worldwide for many years, addressing global climate challenges is the most significant task for humanity [...]
Yuei-An Liou, Yuriy Kuleshov, Chung-Ru Ho, Jean-Pierre Barriot, Chyi-Tyi Lee   +4 more
doaj   +1 more source

Source rupture process inversion of the 2013 Lushan earthquake, China

Geodesy and Geodynamics, 2013
The spatial and temporal slip distribution of the Lushan earthquake was estimated using teleseismic body wave data. To perform a stable inversion, we applied smoothing constraints and determined their optimal relative weights on the observed data using ...
Zhang Lifen, Iman Fatchurochman, Liao Wulin, Li Jinggang, Wang Qiuliang   +4 more
doaj   +1 more source

Analysis of ionospheric structure influences on residual ionospheric errors in GNSS radio occultation bending angles based on ray tracing simulations [PDF]

Atmospheric Measurement Techniques, 2018
The Global Navigation Satellite System (GNSS) radio occultation (RO) technique is widely used to observe the atmosphere for applications such as numerical weather prediction and global climate monitoring.
C. Liu, C. Liu, G. Kirchengast, G. Kirchengast, G. Kirchengast, G. Kirchengast, Y. Sun, Y. Sun, Y. Sun, K. Zhang, K. Zhang, R. Norman, M. Schwaerz, M. Schwaerz, W. Bai, W. Bai, W. Bai, Q. Du, Q. Du, Y. Li   +19 more
doaj   +1 more source

Robust Estimation of Earthquake Magnitude in Indonesia Using PGD Scaling Law from Regional High-Rate GNSS Data

Sensors
The accurate and timely estimation of earthquake magnitude is essential for effective tsunami early warning, particularly in seismically active regions such as Indonesia.
Thomas Hardy, Irwan Meilano, Hasanuddin Z. Abidin, Susilo, Ajat Sudrajat, Supriyanto Rohadi, Retno Agung P. Kambali, Aditya Rahman, Brilian Tatag Samapta, Muhammad Al Kautsar, Alpon Sepriando Manurung, Putu Hendra Widyadharma   +11 more
doaj   +1 more source

An Improved Ambiguity Resolution of Three Carriers in Precise Point Positioning

IEEE Access, 2018
Precise point positioning (PPP) is of great importance in fields requiring coordinates with high accuracy, such as geophysics, meteorology, and geodesy. Compared with relative positioning restricted by the length of baseline, PPP using a single receiver ...
Xiaoying Gu, Bocheng Zhu
doaj   +1 more source

Building a Continental‐Scale Geodetic Network: The Plate Boundary Observatory (PBO)

Perspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.
Abstract The Plate Boundary Observatory (PBO) transformed the use of geodesy in North America to study crustal deformation and plate boundary processes by establishing a continental‐scale, standardized, open‐access geodetic network. Built and operated by UNAVCO between 2003 and 2018 as part of the National Science Foundation (NSF)‐funded EarthScope ...
Emily E. Zawacki, Michael E. Jackson, Glen S. Mattioli, David J. Mencin, Karl Feaux, Donna J. Charlevoix   +5 more
wiley   +1 more source