Zobrazeno 1 - 10
of 77
pro vyhledávání: '"A. Maximilian Semmling"'
Publikováno v:
Remote Sensing, Vol 15, Iss 20, p 5049 (2023)
Coherent observations in GNSS reflectometry are prominent in regions with smooth reflecting surfaces and at grazing elevation angles. However, within these lower elevation ranges, GNSS signals traverse a more extensive atmospheric path, and increased
Externí odkaz:
https://doaj.org/article/9b7d1940747f4b9680875556dce2801f
Autor:
Estel Cardellach, Weiqiang Li, Antonio Rius, Maximilian Semmling, Jens Wickert, Florian Zus, Christopher S. Ruf, Carlo Buontempo
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 13, Pp 102-112 (2020)
The precision of sea surface altimetry using bistatically reflected signals of the Global Navigation Satellite System (GNSS) is typically one to two orders of magnitude worse than dedicated radar altimeters. However, when the scattering is coherent,
Externí odkaz:
https://doaj.org/article/80cca50551984ca58b728c5f3ec99676
Autor:
Yongchao Zhu, Tingye Tao, Kegen Yu, Zhenxuan Li, Xiaochuan Qu, Zhourun Ye, Jun Geng, Jingui Zou, Maximilian Semmling, Jens Wickert
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 13, Pp 217-226 (2020)
The spaceborne Global Navigation Satellite System-Reflectometry (GNSS-R) delay-Doppler map (DDM) data collected over ocean carry typical feature information about the ocean surface, which may be covered by open water, mixed water/ice, complete ice, e
Externí odkaz:
https://doaj.org/article/70a930bfb3bf4937b3c40341f26bff5b
Autor:
Mario Moreno, Maximilian Semmling, Georges Stienne, Wafa Dalil, Mainul Hoque, Jens Wickert, Serge Reboul
Publikováno v:
Remote Sensing, Vol 14, Iss 18, p 4628 (2022)
High-precision GNSS (global navigation satellite e system) measurements can be used for remote sensing and nowadays play a significant role in atmospheric sounding (station data, radio occultation observations) and sea surface altimetry based on refl
Externí odkaz:
https://doaj.org/article/7d6b9148e15f4216ac1ca4bc85e79686
Autor:
Estel Cardellach, Jens Wickert, Rens Baggen, Javier Benito, Adriano Camps, Nuno Catarino, Bertrand Chapron, Andreas Dielacher, Fran Fabra, Greg Flato, Heinrich Fragner, Carolina Gabarro, Christine Gommenginger, Christian Haas, Sean Healy, Manuel Hernandez-Pajares, Per Hoeg, Adrian Jaggi, Juha Kainulainen, Shfaqat Abbas Khan, Norbert M. K. Lemke, Weiqiang Li, Son V. Nghiem, Nazzareno Pierdicca, Marcos Portabella, Kimmo Rautiainen, Antonio Rius, Ingo Sasgen, Maximilian Semmling, C. K. Shum, Francois Soulat, Andrea K. Steiner, Sebastien Tailhades, Maik Thomas, Roger Vilaseca, Cinzia Zuffada
Publikováno v:
IEEE Access, Vol 6, Pp 13980-14018 (2018)
The global navigation satellite system (GNSS) Transpolar Earth Reflectometry exploriNg system (G-TERN) was proposed in response to ESA’s Earth Explorer 9 revised call by a team of 33 multi-disciplinary scientists. The primary objective of the missi
Externí odkaz:
https://doaj.org/article/7ab9295e9cb342dc8b143c1042227d44
Autor:
Yongchao Zhu, Tingye Tao, Jiangyang Li, Kegen Yu, Lei Wang, Xiaochuan Qu, Shuiping Li, Maximilian Semmling, Jens Wickert
Publikováno v:
Remote Sensing, Vol 13, Iss 22, p 4577 (2021)
The knowledge of Arctic Sea ice coverage is of particular importance in studies of climate change. This study develops a new sea ice classification approach based on machine learning (ML) classifiers through analyzing spaceborne GNSS-R features deriv
Externí odkaz:
https://doaj.org/article/5d11d8932e054122aa37734b61c7d9f1
The ionosphere is a layer of Earth's upper atmosphere that is ionized by solar radiation. It plays a crucial role in the propagation of Global Navigation Satellite System (GNSS) signals, as these signals pass through the ionosphere on their way from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3def264bb6c87617e2fe7f9c685f4a04
https://doi.org/10.5194/egusphere-egu23-14654
https://doi.org/10.5194/egusphere-egu23-14654
Autor:
Maximilian Semmling, Jens Berdermann, Hiroatsu Sato, Friederike Fohlmeister, Martin Kriegel, Mainul Hoque
A GNSS data set was recorded for ionosphere sounding on the German research icebreaker Polarstern during the expedition of MOSAiC (Multidisciplinary Observatory for the Study of the Arctic Climate). The GNSS setup comprised a multi-GNSS high-rate (50
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed5cf9ccc8737a59aa4263969985230e
https://doi.org/10.5194/egusphere-egu23-9866
https://doi.org/10.5194/egusphere-egu23-9866
Autor:
Yongchao Zhu, Tingye Tao, Kegen Yu, Xiaochuan Qu, Shuiping Li, Jens Wickert, Maximilian Semmling
Publikováno v:
Remote Sensing, Vol 12, Iss 22, p 3751 (2020)
Two effective machine learning-aided sea ice monitoring methods are investigated using 42 months of spaceborne Global Navigation Satellite System-Reflectometry (GNSS-R) data collected by the TechDemoSat-1 (TDS-1). The two-dimensional delay waveforms
Externí odkaz:
https://doaj.org/article/049099650a234f1e83fecf3f9dfd0523
Autor:
Jens Wickert, Estel Cardellach, Manuel Martin-Neira, Jorge Bandeiras, Laurent Bertino, Ole Baltazar Andersen, Adriano Camps, Nuno Catarino, Bertrand Chapron, Fran Fabra, Nicolas Floury, Giuseppe Foti, Christine Gommenginger, Jason Hatton, Per Hoeg, Adrian Jaggi, Michael Kern, Tong Lee, Zhijin Li, Hyuk Park, Nazzareno Pierdicca, Gerhard Ressler, Antonio Rius, Josep Rosello, Jan Saynisch, Francois Soulat, C. K. Shum, Maximilian Semmling, Ana Sousa, Jiping Xie, Cinzia Zuffada
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 9, Iss 10, Pp 4552-4581 (2016)
GEROS-ISS stands for GNSS REflectometry, radio occultation, and scatterometry onboard the International Space Station (ISS). It is a scientific experiment, successfully proposed to the European Space Agency in 2011. The experiment as the name indicat
Externí odkaz:
https://doaj.org/article/3269779280934875ae3141268be6d785