Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/62400
Title: A comprehensive evaluation and analysis of the performance of multiple tropospheric models in China region
Authors: Chen, B
Liu, Z 
Keywords: Performance evaluation
Radiosonde
Tropospheric delay
Zenith hydrostatic delay (ZHD) model
Zenith wet delay (ZWD) model
Issue Date: 2016
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on geoscience and remote sensing, 2016, v. 54, no. 2, p. 663-678 How to cite?
Journal: IEEE transactions on geoscience and remote sensing 
Abstract: Tropospheric path delay is an important error source in range measurements of many Earth observation systems. In this paper, the accuracies of 9 zenith hydrostatic delay (ZHD) and 18 zenith wet delay (ZWD) models are assessed using benchmark values derived from 10 years (2003-2012) of radiosonde data recorded at 92 stations in the China region. Our study confirms that ZHD can be well modeled with an accuracy of several millimeters by using surface meteorological observations. ZHD derived from the European Center for Medium-Range Weather Forecasts (ECMWF) has the best agreement of 2.8 mm with the radiosonde data in the China region, while the Baby ZHD model achieves the second best with an accuracy of 6.0 mm. All of the ZWD models can only estimate the ZWD with an accuracy of a few centimeters. ECMWF can provide ZWD estimation with the best accuracy of 21.4 mm, followed by the Baby semiempirical, Hopfield, Goad and Goodman, Askne and Nordius, Saastamoinen, Callahan, and Berman 74 ZWD models whose errors are below 40 mm. We find that in the China region all of the ZWD models perform better in winter than in summer and have higher accuracy in high latitudes than low latitudes. The performances of the 18 ZWD models are further validated in a Global Positioning System (GPS) precise point positioning (PPP) computation at 6 GPS stations in China. The PPP results also confirm that ECMWF is the best model. Considering its performance and simplicity, we conclude that Saastamoinen is the optimal ZWD model for the China region.
URI: http://hdl.handle.net/10397/62400
ISSN: 0196-2892
EISSN: 1558-0644
DOI: 10.1109/TGRS.2015.2456099
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

WEB OF SCIENCETM
Citations

1
Last Week
0
Last month
Citations as of Aug 13, 2017

Page view(s)

15
Last Week
1
Last month
Checked on Aug 13, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.