This standard provides guidelines for selecting reference and standard atmospheric models for engineering design or scientific research. The guide describes the content of the model, uncertainties and limitations, technical basis, data bases from which the model is formed, publication references, and sources of computer code for thirty-three (33) atmospheric models for altitudes from Earth's surface to 2400 kilometers, which are generally recognized in the aerospace sciences. Information on atmospheric models for Mars and Venus is also included. This Guide is intended to assist aircraft and space vehicle designers and developers, geophysicists, meteorologists, and climatotogists in understanding available models, comparing sources of data, and interpreting engineering and scientific results based on different atmospheric models.