本指南有助于为工程设计或科学研究选择电离层模型。它描述了模型的内容、不确定性和局限性、技术基础、形成模型的数据库、出版物参考以及46个电离层模型的计算机代码来源。这些模型覆盖了从地球表面到大约10000公里的高度范围。本指南旨在帮助通信和空间系统设计师和开发人员、地球物理学家、空间物理学家和气候学家理解可用的模型，比较数据源，并解释基于不同电离层模型的工程和科学结果。

This guide assists in the selection of ionospheric models for engineering design or scientific research. It describes the content of the models, uncertainties and limitations, technical basis, databases from which the models are formed, publication references, and sources of computer codes for 46 ionospheric models.The models cover the altitude range from the Earth's surface to approximately 10,000 kilometers. This guide is intended to assist communication and space system designers and developers, geophysicists, space physicists, and climatologists in understanding available models, comparing sources of data, and interpreting engineering and scientific results based on different ionospheric models.