Publication: Improving the performance of GPS/MET 3DVAR by using the ADG software
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Improving the performance of GPS/MET 3DVAR by using the ADG software

- Part of a collection -
 

Area
Data Assimilation

Author(s)
Qiang Cheng , Haibin Zhang , Yonghua Zhao , Bin Wang

Published in
Proceedings of First International Conference of Modeling and Simulation

Editor(s)
Honggao Yu, Yong Jiang

Year
2008

Publisher
ACADEMIC

Abstract
In this paper we calculate the gradient of the object function in GPS/MET three-dimensional variational data assimilation program (3DVAR) by replacing the adjoint model with that generated by using the ADG software. A number of techniques are used to reduce the time cost of the adjoint model. The main contribution of this work is to demonstrate that the time cost for developing the adjoint model is dramatically shortened from two years and half by hand to no more than three months by using the ADG software. The experimental results show that the time cost of the users’ code is reduced by 34% after optimization.

AD Tools
ADG

BibTeX
@INPROCEEDINGS{
         Cheng2008Itp,
       title = "Improving the performance of GPS/MET 3DVAR by using the ADG software",
       author = "Qiang Cheng, Haibin Zhang, Yonghua Zhao, Bin Wang",
       editor = "Honggao Yu, Yong Jiang",
       publisher = "ACADEMIC",
       year = "2008",
       booktitle = "Proceedings of First International Conference of Modeling and Simulation",
       series = "IV",
       pages = "7--11",
       abstract = "In this paper we calculate the gradient of the object function in GPS/MET
         three-dimensional variational data assimilation program (3DVAR) by replacing the adjoint model with
         that generated by using the ADG software. A number of techniques are used to reduce the time cost of
         the adjoint model. The main contribution of this work is to demonstrate that the time cost for
         developing the adjoint model is dramatically shortened from two years and half by hand to no more
         than three months by using the ADG software. The experimental results show that the time cost of the
         users’ code is reduced by 34% after optimization.",
       ad_area = "Data Assimilation",
       ad_tools = "ADG"
}


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