Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Ehsan Forootan"'
Autor:
Wei Chen, Yuhao Xiong, C.K. Shum, Ehsan Forootan, Min Zhong, Jiangjun Ran, Changqing Wang, Wei Feng, Wenhao Li, Zihan Yang, Yingchun Shen
Publikováno v:
All Earth, Vol 36, Iss 1, Pp 1-17 (2024)
The Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow-On (GRACE-FO) missions have enabled consistent production of monthly gravity field solutions by international institutes, contributing to the International Centre for Global Earth M
Externí odkaz:
https://doaj.org/article/49f9efcb6f544e408c8330137170ecc5
Publikováno v:
Earth and Space Science, Vol 11, Iss 10, Pp n/a-n/a (2024)
Abstract The estimation of the wet refractivity indices is crucial for applications like weather predictions or improving the accuracy of real‐time positioning techniques. Traditionally, solving the inverse tomography problem to estimate these atmo
Externí odkaz:
https://doaj.org/article/3b44d0a3e3444f4aa82634dba7bf0e4e
Autor:
Ehsan Forootan, Saeed Farzaneh, Mona Kosary, Claudia Borries, Timothy Kodikara, Maike Schumacher
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-13 (2023)
Abstract Estimating global and multi-level Thermosphere Neutral Density (TND) is important for studying coupling processes within the upper atmosphere, and for applications like orbit prediction. Models are applied for predicting TND changes, however
Externí odkaz:
https://doaj.org/article/c801187166eb47e9a0edc9a9521f934e
Autor:
Ehsan Forootan, Nooshin Mehrnegar
Publikováno v:
All Earth, Vol 34, Iss 1, Pp 120-146 (2022)
Gravity Recovery and Climate Experiment (GRACE) and its Follow-On mission (GRACE-FO) have become an indispensable tool in monitoring global mass variations. However, separating GRACE(-FO) signals into its individual Terrestrial Water Storage Changes
Externí odkaz:
https://doaj.org/article/3c77f85dd3524a78835ab0118e9a5ab9
Autor:
Isabel Fernandez-Gomez, Timothy Kodikara, Claudia Borries, Ehsan Forootan, Andreas Goss, Michael Schmidt, Mihail V. Codrescu
Publikováno v:
Earth, Planets and Space, Vol 74, Iss 1, Pp 1-13 (2022)
Abstract Dynamical changes in the ionosphere and thermosphere during geomagnetic storm times can have a significant impact on our communication and navigation applications, as well as satellite orbit determination and prediction activities. Because o
Externí odkaz:
https://doaj.org/article/be77038cbbf34b4b89789932f5e154ea
Autor:
Ehsan Forootan, Mona Kosary, Saeed Farzaneh, Timothy Kodikara, Kristin Vielberg, Isabel Fernandez-Gomez, Claudia Borries, Maike Schumacher
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-19 (2022)
Abstract Global estimation of thermospheric neutral density (TND) on various altitudes is important for geodetic and space weather applications. This is typically provided by models, however, the quality of these models is limited due to their imperf
Externí odkaz:
https://doaj.org/article/870c614d63b440e6b469382a5ad7f478
Publikováno v:
Atmosphere, Vol 14, Iss 1, p 112 (2023)
Constructing accurate models that provide information about water vapor content in the troposphere improves the reliability of numerical weather forecasts and the position accuracy of low-cost Global Navigation Satellite System (GNSS) receivers. Howe
Externí odkaz:
https://doaj.org/article/25ce4260e41647f9a8b3090838e4df54
Autor:
Wei Chen, C. K. Shum, Ehsan Forootan, Wei Feng, Min Zhong, Yuanyuan Jia, Wenhao Li, Junyi Guo, Changqing Wang, Quanguo Li, Lei Liang
Publikováno v:
Remote Sensing, Vol 14, Iss 20, p 5194 (2022)
Accurately monitoring spatio-temporal changes in lake water levels is important for studying the impacts of climate change on freshwater resources, and for predicting natural hazards. In this study, we applied multi-mission radar satellite altimetry
Externí odkaz:
https://doaj.org/article/245c9971ea524d179d1da401b60fe270
Autor:
Anke Fluhrer, Thomas Jagdhuber, Alireza Tabatabaeenejad, Hamed Alemohammad, Carsten Montzka, Peter Friedl, Ehsan Forootan, Harald Kunstmann
Publikováno v:
Remote Sensing, Vol 14, Iss 12, p 2755 (2022)
A P-band SAR moisture estimation method is introduced for complex soil permittivity and penetration depth estimation using fully polarimetric P-band SAR signals. This method combines eigen- and model-based decomposition techniques for separation of t
Externí odkaz:
https://doaj.org/article/6ecdcbf66421485392a5ad300399a5a4
Autor:
Saeed Farzaneh, Ehsan Forootan
Publikováno v:
Remote Sensing, Vol 12, Iss 21, p 3545 (2020)
A new approach is presented to improve the spatial and temporal resolution of the Vertical Total Electron Content (VTEC) estimates for regional positioning applications. The proposed technique utilises a priori information from the Global Ionosphere
Externí odkaz:
https://doaj.org/article/9d6c065f448f44db8b2a8e9d9c95c680