Chapter 2 introduces the background of AOS, CCSDS Principal Network, AOS services, the characteristics of AOS and the system of tracking that supports AOS Recommendation in detail.

• 第二章研究了AOS建议制定的背景与适用对象、CCSDS主网(CPN)、AOS的分层结构与提供的八种业务、AOS的特点和支持AOS体制的测控系统等内容。