Results 221 to 230 of about 5,914 (256)

Construction of LSTM model for total electron content (TEC) prediction in Thailand

2021 18th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), 2021
Total electron content (TEC) is an important parameter often used to explain the ionosphere characteristics and disturbances. Severe local disturbance often originates in the equatorial region then expand to low- and mid-latitude regions. Vertical TEC (VTEC as well as slant TEC (STEC) modeling’s and predictions attract attention from researchers ...
Pathorn Chimsuwan, Pornchai Supnithi, Watid Phakphisut, Lin Min Min Myint   +3 more
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Bidirectional LSTM for ionospheric vertical Total Electron Content (TEC) forecasting

2017 IEEE Visual Communications and Image Processing (VCIP), 2017
The ionosphere is a region over earth's atmosphere which is ionized by solar radiation. It plays an important part in atmospheric electricity and forms the inner edge of the magnetosphere, furthermore, it has practical importance for its effects on radio propagation to earth.
Wenqing Sun, Long Xu 0001, Xin Huang, Weiqiang Zhang, Tianjiao Yuan, Yihua Yan   +5 more
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Determination of total electron content (TEC) due to location in Malaysia

2013 IEEE 4th Control and System Graduate Research Colloquium, 2013
This paper studied the TEC values for Malaysia regions, a few location of GPS receiver stations were chosen.. The transmitted GPS signals must propagate through the ionosphere layer at the atmosphere before reaching the surface. The ionosphere layer can cause the effect of the GPS due to the electron density at this layer.
Norsuzila Ya'acob, Amirah Aiyub, Azita Laily Yusof, null Mohd Syukri Mohd Hashim   +3 more
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Forecasting of ionospheric vertical total electron content (TEC) using LSTM networks

2017 International Conference on Machine Learning and Cybernetics (ICMLC), 2017
Ionosphere is an important space environment near the earth. Its disturbance would result in severe propagation effects to radio information system, thus causing bad influences on communication, navigation, radar and so on. The total electron content (TEC) is an important parameter to present the disturbance of ionosphere, so TEC forecast is very ...
Wenqing Sun, Long Xu 0001, Xin Huang, Weiqiang Zhang, Tianjiao Yuan, Zhuo Chen 0006, Yihua Yan   +6 more
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Improving Total Electron Content (TEC) Models for Geodetic Applications

2020
<p>Increasing the quality of ionosphere modeling is crucial and remains a challenge for many geodetic applications such as GNSS Precise Point Positioning (PPP) and navigation. Ionosphere models are the main tool to provide an estimation of Total Electron Content (TEC) to be corrected from GNSS career phase and pseudorange ...
Mona Kosary, Saeed Farzaneh, Maike Schumacher, Ehsan Forootan   +3 more
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TEC (Total Electron Content) Models

1989
Abstract : Models of the ionosphere were developed and utilized to evaluate Total Electron Content for various specified transmission paths from the ground into space. Keywords: Ionosphere; Total electron content.
null Peter, Dickson Kevin P., Larson Andrew J., Jr. Mazzella   +3 more
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Estimation of total electron content (TEC) using spaceborne GPS measurements

The Journal of the Astronautical Sciences, 2008
TerraSAR-X (TSX), a high-resolution interferometric Synthetic Aperture Radar (SAR) mission from DLR (German Aerospace Center, Deutsches Zentrum fur Luft-und Raumfahrt), was successfully launched into orbit on June 15, 2007. It includes a dual-frequency GPS receiver called IGOR (Integrated GPS Occultation Receiver), which is a heritage NASA/JPL ...
Key-Rok Choi, E. Glenn Lightsey
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Investigation of the annual solar eclipse by using Total Electron Content (TEC) measurements

2011 IEEE Symposium on Wireless Technology and Applications (ISWTA), 2011
This research investigates the ionosphere response to the annual solar eclipse on 26th January 2009 over Indonesia and Singapore. During solar eclipse, ionosphere will be affect due to the partial or complete obstruction of solar emission. It makes the number of electrons and ions decreases.
Norsuzila Ya'acob, Azita Laily Yusof, Mohd Tarmizi Ali, Mohd Khairul Mohd Salleh, Idnin Pasya, null Sari Yusmidar Mohamed Sharihuddin   +5 more
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Increases of equatorial total electron content (TEC) during magnetic storms

Journal of Atmospheric and Terrestrial Physics, 1976
Abstract This paper is a report on the analysis of equatorial electron content, TEC, during magnetic storms. Storms between 1969 and 1972 have been examined as part of an on-going study of TEC morphology during magnetically disturbed days. The published magnetic K p indices and TEC data from the Legon observatory have been employed.
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GPS Total Electron Content (TEC) estimation using single station measurements

2019 Sixth International Conference on Aerospace Science and Engineering (ICASE), 2019
Global Positioning System (GPS) operates in the microwave band, for which ionosphere is a dispersive medium and has a frequency-dependent effect on the signals. This effect can be used to gather vital information about the ionosphere itself in terms of the Vertical Total Electron Content (vTEC).
Maria Mehmood, Najam Abbas Naqvi, Sajid Saleem   +2 more
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