DOI: 10.1029/2012JD017782
论文题名: A bending angle forward operator for global positioning system radio occultation measurements
作者: Cucurull L. ; Derber J.C. ; Purser R.J.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 1 起始页码: 14
结束页码: 28
语种: 英语
英文关键词: data assimilation
; GPS RO
; operational NWP
Scopus关键词: Algorithms
; Global positioning system
; Tracking (position)
; Weather forecasting
; Accuracy and precision
; Data assimilation
; National centers for environmental predictions
; Numerical weather prediction
; Operational assimilation
; Operational configuration
; operational NWP
; Radio occultation measurements
; Refraction
; algorithm
; climate prediction
; data assimilation
; decadal variation
; GPS
; NOAA satellite
; precision
; refraction
; refractive index
英文摘要: Applications for space-based GPS technology have extended to the atmospheric field during the last two decades. More recently, numerical weather prediction (NWP) centers started incorporating global positioning system (GPS) radio occultation (RO) soundings into their operational assimilation algorithms, resulting in a significant improvement in weather forecasting skill. The main reasons for such benefits are the unbiased nature of the GPS RO measurements, high accuracy and precision, all-weather capability, and equal accuracy over either land or ocean. Profiles of refractivity or bending angle are typically used, owing to the relative simplicity of their forward operators and the computational economy this implies. Although the NOAA National Centers for Environmental Prediction (NCEP) are using refractivities in their operational configuration, a bending angle forward operator has been developed, tested, and implemented and was scheduled to replace the assimilation of refractivities operationally in May, 2012. Results from the NCEP's bending angle method (NBAM) show improvement over the assimilation of refractivities in all atmospheric fields being evaluated. A detailed description and evaluation of NBAM is presented in this article, as well as the advantages this code offers over the assimilation of refractivities and other existing algorithms that assimilate GPS RO bending angles. Key-points implementation of a new forward operator for GPS RO assimilation benefits of the new forward operator detail analysis of the performance of the new forward operator. © 2012 American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63962
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: National Centers for Environmental Prediction, Environmental Modeling Center, Washington, DC, United States; University Corporation for Atmospheric Research, Boulder, CO, United States; IMSG, Washington, DC, United States
Recommended Citation:
Cucurull L.,Derber J.C.,Purser R.J.. A bending angle forward operator for global positioning system radio occultation measurements[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(1)