Results 151 to 160 of about 1,516 (192)

Digitalized suicide risk assessment in emergency psychiatry services. [PDF]

Front Psychiatry
Duica L, Bran M, Plesea-Condratovici C, Nicolcescu P, Antonescu I, Constantinescu N.   +5 more
europepmc   +1 more source

Detection and updation of landslide inventory before and during impoundment in the Baihetan reservoir area using multi-temporal InSAR datasets. [PDF]

Sci Rep
Dun J, Feng W, Yi X, Ding Z, Zhuo G, Dai K, Wu M.   +6 more
europepmc   +1 more source

Usability of high-resolution GNSS-ZTD data in the AROME model

, 2018
openaire   +1 more source

Assessment of ZTD derived from ECMWF/NCEP data with GPS ZTD over China

GPS Solutions, 2011
The accuracy and feasibility of computing the zenith tropospheric delays (ZTDs) from data of the European Center for Medium-Range Weather Forecasts (ECMWF) and the United States National Centers for Environmental Prediction (NCEP) are studied. The ZTDs are calculated from ECMWF/NCEP pressure-level data by integration and from the surface data with the ...
Qinming Chen, Yuei-An Liou, Shuli Song
exaly   +5 more sources

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A new ZTD model based on permanent ground-based GNSS-ZTD data

Survey Review, 2016
Tropospheric delay has a major effect on the accuracy of navigation and positioning when using the Global Navigation Satellite System (GNSS). Zenith tropospheric delay (ZTD) modelling has been used to weaken the influence of the atmosphere. The work reported here focused on ZTD modelling based on real-time surface meteorological parameters ...
M Ding
exaly   +2 more sources

Development and evaluation of the refined zenith tropospheric delay (ZTD) models [PDF]

Satellite Navigation, 2021
AbstractThe tropospheric delay is a significant error source in Global Navigation Satellite System (GNSS) positioning and navigation. It is usually projected into zenith direction by using a mapping function. It is particularly important to establish a model that can provide stable and accurate Zenith Tropospheric Delay (ZTD).
Jiming Guo, Fei Yang, Xiaolin Meng
exaly   +3 more sources

Assessing long-term ZTD trends for climate

2023
In this presentation we showcase results of an ongoing effort to assess long-term ZTD trends for eventual use in climate models, either for assimilation or validation. We have been analyzing the ZTD time series estimated from six REPRO3 IGS Analysis Centers (ACs), namely, COD, ESA, GFZ, GRG, JPL, TUG, to compare their long-term trends.
Marcelo C. Santos, Jordan Rees, Kyriakos Balidakis,, Anna Klos, Rosa Pacione   +4 more
openaire   +1 more source

A method for calculating real-time ZTD grid data in Chinese regions based on GNSS ZTD modified ERA5 grid products

Journal of Atmospheric and Solar-Terrestrial Physics
Shirong Ye, Pengzhi Wei, Zhimin Sha
exaly   +2 more sources

Assessing the Impact of GNSS ZTD Data Assimilation into the WRF Modeling System during High-Impact Rainfall Events over Greece

Remote Sensing, 2020
The derivation of global navigation satellite systems (GNSSs) tropospheric products is nowadays a state-of-the-art technique that serves both research and operational needs in a broad range of applications in meteorology.
Christos Giannaros, Christos Pikridas, Theodore M Giannaros   +2 more
exaly   +2 more sources

Estimation of ZTD Using ANFIS

2015
This chapter describes the estimation of zenith tropospheric delay (ZTD) using ANFIS technique followed by obtaining of ZTD data from GPS together with data location of dataset. This chapter also describes the method of analysis used in the development of ZTD estimation model.
Wayan Suparta, Kemal Maulana Alhasa
openaire   +1 more source