Ooce Note Series on Global Modeling and Data Assimilation Documentation of the Physical-space Statistical Analysis System (psas) Part I: the Conjugate Gradient Solver Version Psas-1.00
Ooce Note Series on Global Modeling and Data Assimilation Documentation of the Physical-space Statistical Analysis System (psas) Part I: the Conjugate Gradient Solver Version Psas-1.00
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Ooce 笔记系列：物理空间统计分析系统 (psas) 的全局建模和数据同化文档，第 I 部分：共轭梯度求解器版本 Psas-1.00
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通讯作者：
Silva Jing Guo
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作者：
R. Rood;Head;A. Da;Silva Jing Guo
本文描述了DAO的物理空间统计分析系统（PSAS）的共轭梯度求解器组件的第1版。概述了一般PSAS算法，其次是预条件共轭梯度算法的轮廓，并在PSAS中实现。文中给出了与共轭梯度法有关的For-tran 90主要子程序的说明，并在附录中列出了源程序。这OOce笔记集中在PSAS算法的一个特定方面，即共轭梯度sol ver。观测和预报误差协方差建模的细节、并行化和区域分解的策略、数据流和用户界面将在随后的D AO OOce Notes中描述。iii目录摘要iii 1引言1 2 PSAS概述1 3共轭梯度算法概述3
This document describes Version 1 of the conjugate gradient solver component o f DAO's Physical-space Statistical Analysis System (PSAS). An overview of the general PSAS algorithm is presented, followed by an outline of the pre-conditioned conjugate gradient algorithm, and its implementation in PSAS. A description of the main For-tran 90 subroutines related to the conjugate gradient s o l v er is given, with the source code listed in the Appendix. This OOce Note focuses on a particular aspect of the PSAS algorithm, namely the conjugate gradient s o l v er. The details of the observation and forecast error covariance modeling, the strategies for parallelization and domain decomposition, data ow a n d user inetrface will be described in subsequent D AO OOce Notes. iii Contents Abstract iii 1 Introduction 1 2 Overview of PSAS 1 3 Overview of the Conjugate Gradient Algorithm 3