Results 11 to 20 of about 376 (139)
Optimizing PPP Performance by Incorporating ZWD Constraints Derived From Data Assimilation [PDF]
Earth and Space ScienceAbstractOne of the primary error sources limiting the performance of the Precise Point Positioning (PPP) technique is the atmospheric wet delay, caused by the presence of water vapor in the lower atmosphere. Accurately representing this parameter is crucial for improving the initialization and accuracy of satellite‐based positioning techniques. However,
Masoud Dehvari +2 more
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Developing Iran's empirical zenith wet delay model (IR-ZWD) [PDF]
Journal of Atmospheric and Solar-Terrestrial Physics, 2023 The presence of water vapor in the lower atmosphere can introduce errors in satellite-based geodetic observations. Accurate modeling of this part of atmospheric delay is particularly challenging due to the considerable variations of water vapor. Therefore, constructing a reasonable model to predict Zenith Wet Delay (ZWD) can improve the accuracy of ...
Masoud Dehvari +2 more
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Detection of Alpine Foehn in GNSS-ZWD time series: An innovative application of GNSS Meteorology [PDF]
, 2021 <p>The atmospheric delay experienced by a signal of the Global Navigation Satellite System (GNSS) is proportional to the water vapour content along the signal path. This fact is typically exploited in GNSS Meteorology by introducing GNSS derived atmospheric parameters like the Zenith Wet Delay (ZWD) in data assimilation schemes.
Matthias Aichinger-Rosenberger +2 more
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An empirical zenith wet delay correction model using piecewise height functions [PDF]
Annales Geophysicae, 2018 Tropospheric delay is an important error source in space geodetic techniques. The temporal and spatial variations of the zenith wet delay (ZWD) are very large and thus limit the accuracy of tropospheric delay modelling.
Y. Yao, Y. Yao, Y. Yao, Y. Hu, Y. Hu
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Journal of Traditional Chinese Medical Sciences, 2023 Objective: To explore the kidney yang deficiency pattern (KYDP) in a chronic kidney disease (CKD) rat model and the mechanisms underlying the effects of Zhenwu decoction (ZWD) by conducting transcriptomic and metabolomic analyses.
Pengfei Zheng +7 more
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Geoid, 2021 Global Navigation Satellite System (GNSS) semakin dikembangkan sebagai sistem penginderaan jauh atmosfer, salah satunya melalui perhitungan Zenith Tropospheric Delay (ZTD).
Norma Aji Cemara Mannani +1 more
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Machine Learning-Based Calibrated Model for Forecast Vienna Mapping Function 3 Zenith Wet Delay
Remote Sensing, 2023 An accurate estimation of zenith wet delay (ZWD) is crucial for global navigation satellite system (GNSS) positioning and GNSS-based precipitable water vapor (PWV) inversion. The forecast Vienna Mapping Function 3 (VMF3-FC) is a forecast product provided
Feijuan Li +5 more
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Remote Sensing, 2020 A new concept is proposed for estimating the zenith wet delay (ZWD) and atmospheric weighted average temperature by inputting the temperature, total pressure, and specific humidity from surface weather data.
Pengfei Xia +3 more
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Adaptive neuro fuzzy inference system for predicting sub-daily Zenith Wet Delay
Geodesy and Geodynamics, 2022 In recent years, the focus of tropospheric studies has evolved to GNSS meteorology and weather forecasting. The Zenith Wet Delay (ZWD), which might be assembled to the Integrated Water Vapour (IWV), is an essential component of the tropospheric delay ...
Jareer Mohammed
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Short-Term PM2.5 Concentration Prediction by Combining GNSS and Meteorological Factors
IEEE Access, 2020 With the development of industrialization, fine particulate matter (PM2.5) severely chills the health of people. Studies have shown that the variation of PM2.5 concentration is related to the Global Navigation Satellite System (GNSS) tropospheric delay ...
Hongfeng Wen, Yamin Dang, Liwei Li
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