Results 81 to 90 of about 1,305 (167)

The STARTWAVE atmospheric water database [PDF]

, 2005
International audienceThe STARTWAVE (STudies in Atmospheric Radiative Transfer and Water Vapour Effects) project aims to investigate the role which water vapour plays in the climate system, and in particular its interaction with radiation.
B. Deuber, B. Deuber, C. Mätzler, D. G. Feist, J. Morland, L. Martin, L. Vuilleumier, N. Kämpfer, P. Jeannet, S. Nyeki, S. Nyeki   +10 more
core   +3 more sources

Subtle Land Subsidence Elevates Future Storm Surge Risks Along the Gulf Coast of the United States

Journal of Geophysical Research: Earth Surface, Volume 129, Issue 9, September 2024.
Abstract We developed a robust InSAR processing strategy that can effectively mitigate severe decorrelation noise in a large volume of InSAR data. We mapped the average land subsidence rate (2017–2020) over the 131,572 km2 Upper Texas and Louisiana coasts from Sentinel‐1 data, with ∼2 mm/yr accuracy based on independent GPS and tide gauge validation at
Ke Wang, Jingyi Chen, Eirik Valseth, Gordon Wells, Srinivas Bettadpur, Cathleen E. Jones, Clint Dawson   +6 more
wiley   +1 more source

Regional Tropospheric Delay Prediction Model Based on LSTM-Enhanced Encoder Network

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Precise modeling of zenith tropospheric delay (ZTD) is essential for real-time high-precision positioning in global navigation satellite systems. Due to the stochastic variability of atmospheric water vapor across different regions, tropospheric delay ...
Yuanfang Peng, Chenglin Cai, Zexian Li, Kaihui Lv, Xue Zhang, Yihao Cai   +5 more
doaj   +1 more source

A New Global Tropospheric Delay Model Considering the Spatiotemporal Variation Characteristics of ZTD With Altitude Coefficient

Earth and Space Science, 2020
Tropospheric delay error is independent of the signal's frequency and has strong spatiotemporal variation. It is one of the most severe error sources of satellite navigation and spatial measurement. In view of the limitation of global zenith tropospheric
Peng Chen, Yongchao Ma, Hang Liu, Naiquan Zheng   +3 more
doaj   +1 more source

Impact and implementation of higher-order ionospheric effects on precise GNSS applications [PDF]

, 2017
High precision Global Navigation Satellite Systems (GNSS) positioning and time transfer require correcting signal delays, in particular higher-order ionospheric (I2+) terms.
Adeniyi, Banville, Bergeot, Bilitza, Bock, Boehm, Boehm, Brunner, Deng, Deng, Dow, Fritsche, Gulyaeva, Hadaś, Hernandez-Pajares, Hernández-Pajares, Hernández-Pajares, Hernández-Pajares, Hernández-Pajares, Hernández-Pajares, Hoque, Jakowski, Jiang, Joshua, Kedar, Liu, Lutz, Odijk, Orús-Pérez, Orús-Pérez, Paziewski, Paziewski, Paziewski, Petrie, Petrie, Prange, Saastamoinen, Thébault, Zus   +38 more
core   +2 more sources

Improving Sentinel‐3 Altimetry Data With GPD+ Wet Tropospheric Corrections

Earth and Space Science, Volume 11, Issue 8, August 2024.
Abstract The provision of accurate wet tropospheric corrections (WTC), accounting for the delay of the radar pulses caused mostly by the atmospheric water vapor in the altimeter‐range observations, is pivotal for the full exploitation of altimeter‐derived surface heights.
M. J. Fernandes, T. Vieira, C. Lázaro, B. Vasconcellos, P. Aguiar   +4 more
wiley   +1 more source

Evaluate the Impact of Regional Ionospheric Data Assimilation Model on Precise Point Positioning

Space Weather, Volume 22, Issue 8, August 2024.
Abstract This study presents an innovative approach to improving the accuracy and reducing the error convergence time of static Precise Point Positioning (PPP) in Global Positioning System (GPS) navigation. The research focuses on the impact of the high spatial and temporal resolution of a regional ionospheric data assimilation model on PPP over Taiwan.
Yan‐Shen Chen, Chia‐Hung Chen, Ming Yang, Feng‐Yu Chu   +3 more
wiley   +1 more source

Improving GNSS precise point positioning with tropospheric constraints from data-driven numerical weather prediction model

Geo-spatial Information Science
Accurate priori tropospheric knowledge is advantageous for Global Navigation Satellite System (GNSS) precise point positioning (PPP), which significantly influences both convergence time and the accuracy of tropospheric delay estimations.
Yuanfan Deng, Wu Chen, Junsheng Ding, Ahmed El-Mowafy, Duojie Weng, Long Tang, Lei Bai, Xiaolong Mi   +7 more
doaj   +1 more source

Improving GNSS PPP Performance in the South China Under Different Weather Conditions by Using the Weather Research and Forecasting (WRF) Model‐Derived Wet Delay Corrections

Earth and Space Science, Volume 11, Issue 3, March 2024.
Abstract Atmospheric wet delay caused by Precipitable Water Vapor (PWV) significantly impacts the performance of many geodetic surveying systems such as Global Navigation Satellite System (GNSS). In this study, we use wet delay corrections forecast by the Weather Research and Forecasting (WRF) model to enhance GNSS Precise Point Positioning (PPP ...
Yangzhao Gong, Zhizhao Liu, Shiwei Yu, Pak Wai Chan, Kai Kwong Hon   +4 more
wiley   +1 more source

Analysis and Inter-Calibration of Wet Path Delay Datasets to Compute the Wet Tropospheric Correction for CryoSat-2 over Ocean [PDF]

, 2013
Unlike most altimetric missions, CryoSat-2 is not equipped with an onboard microwave radiometer (MWR) to provide wet tropospheric correction (WTC) to radar altimeter measurements, thus, relying on a model-based one provided by the European Center for ...
Alexandra L Nunes, Clara Lazaro, Joana Fernandes, MJ   +2 more
core   +2 more sources