DOI: 10.1002/2013JD020170
论文题名: Performance of the high-resolution atmospheric model HRRR-AK for correcting geodetic observations from spaceborne radars
作者: Gong W. ; Meyer F.J. ; Webley P. ; Morton D.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 20 起始页码: 11611
结束页码: 11624
语种: 英语
英文关键词: atmospheric delays
; numerical weather prediction
; radar remote sensing
Scopus关键词: Geodesy
; Statistical methods
; Synthetic aperture radar
; Weather forecasting
; Atmospheric delay
; Ground deformation monitoring
; High-resolution atmospheric models
; Numerical weather prediction
; Numerical weather prediction models
; Performance limitations
; Radar remote sensing
; Radiosonde observations
; Geodetic satellites
; atmospheric correction
; atmospheric modeling
; data acquisition
; geodesy
; performance assessment
; radiosonde
; remote sensing
; SIR
; synthetic aperture radar
; weather forecasting
; Alaska
; United States
英文摘要: Atmospheric phase delays are considered to be one of the main performance limitations for high-quality satellite radar techniques, especially when applied to ground deformation monitoring. Numerical weather prediction (NWP) models are widely seen as a promising tool for the mitigation of atmospheric delays as they can provide knowledge of the atmospheric conditions at the time of Synthetic Aperture Radar data acquisition. However, a thorough statistical analysis of the performance of using NWP production in radar signal correction is missing to date. This study provides a quantitative analysis of the accuracy in using operational NWP products for signal delay correction in satellite radar geodetic remote sensing. The study focuses on the temperate, subarctic, and Arctic climate regions due to a prevalence of relevant geophysical signals in these areas. In this study, the operational High Resolution Rapid Refresh over the Alaska region (HRRR-AK) model is used and evaluated. Five test sites were selected over Alaska (AK), USA, covering a wide range of climatic regimes that are commonly encountered in high-latitude regions. The performance of the HRRR-AK NWP model for correcting absolute atmospheric range delays of radar signals is assessed by comparing to radiosonde observations. The average estimation accuracy for the one-way zenith total atmospheric delay from 24 h simulations was calculated to be better than ~14 mm. This suggests that the HRRR-AK operational products are a good data source for spaceborne geodetic radar observations atmospheric delay correction, if the geophysical signal to be observed is larger than 20 mm. Key Points A thorough statistical analysis of HRRR-AK in radar signal correction The quality dependence of absolute delay predictions has been discussed in-depth The HRRR-AK is a useful data source for geodetic radar signal correction ©2013 The Authors. Journal of Geophysical Research: Atmospheres published by Wiley on behalf of the American Geophysical Union. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63210
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Earth and Planetary Remote Sensing Group, Geophysical Institute, University of Alaska Fairbanks, 903 Koyukuk Dr., Fairbanks, AK 99775, United States; Arctic Region Supercomputing Center, University of Alaska Fairbanks, Fairbanks AK, United States
Recommended Citation:
Gong W.,Meyer F.J.,Webley P.,et al. Performance of the high-resolution atmospheric model HRRR-AK for correcting geodetic observations from spaceborne radars[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(20)