ISO 13541:2021 PDF

This document specifies two standard message formats for use in transferring spacecraft attitude information between space agencies: the Attitude Parameter Message (APM) and the Attitude Ephemeris Message (AEM).° Such exchanges are used for:

- preflight planning for tracking or attitude estimation support;

- scheduling attitude and data processing support;

- carrying out attitude operations;

- performing attitude comparisons;

- carrying out attitude propagations and/or sensor predictions;

- testing to initialize sub-system simulators (communications, power, etc.).

This document includes sets of requirements and criteria that the message formats have been designed to meet.° For exchanges where these requirements do not capture the needs of the participating agencies, another mechanism may be selected.