空间数据和信息传输系统. 结合数据报文

[中文适用范围]： 本会合数据电文 (CDM) 推荐标准规定了用于在会合评估 (CA) 发起者与卫星所有者/运营商及其他授权方之间交换航天器会合信息的标准电文格式。此类交换用于告知卫星所有者/运营商太空物体之间的会合情况，以便采用不同 CA 技术的不同组织能够发出一致的警告。本推荐标准将：a) 促进互操作性，并在提供 CA 的数据发起者和使用 CA 的卫星所有者/运营商之间发出一致的警告；b) 促进 CA 流程的自动化；c) 提供关键信息以便及时做出 CA 决策。本文档包含电文格式旨在满足的要求和标准（参见附件 D）。其中还包括与执行 CA 相关的会合信息的详细说明（参见附件 E）。 [外文原描述]： ISO 19389:2014 specifies a standard message format for use in exchanging spacecraft conjunction information between originators of Conjunction Assessments (CAs) and satellite owner/operators and other authorized parties. Such exchanges are used to inform satellite owner/operators of conjunctions between objects in space to enable consistent warning by different organizations employing diverse CA techniques. ISO 19389:2014 will: facilitate interoperability and enable consistent warning between data originators who supply CA and the satellite owner/operators who use it; facilitate automation for the CA processes; and provide critical information to enable timely CA decisions. This document includes requirements and criteria that the message format has been designed to meet (see Annex D). Also included are informative descriptions of conjunction information pertinent to performing CA (see Annex E). ISO 19389:2014 is applicable to satellite operations in all environments in which close approaches and collisions among satellites are concerns. It contains the specification for a Conjunction Data Message (CDM) designed for applications involving conjunction information interchange between originators of CAs and recipients. Conjunction information includes data types such as miss distance, probability of collision, Time of Closest Approach (TCA), and closest approach relative position and velocity. Further information describing the conjunction information contained in this message can be found in section 3 and Annex E. This message is suited for exchanges that involve manual or automated interaction. The attributes of a CDM make it suitable for use in machine-to-machine interfaces because of the large amount of data typically present. The CDM is self contained. However, additional information could be specified in an Interface Control Document (ICD) written jointly by the service originator and recipients. It is desirable that CDM originators maintain consistency with respect to the optional keywords provided in their implementations; i.e., it is desirable that the composition of the CDMs provided not change on a frequent basis. ISO 19389:2014 is applicable only to the message format and content, but not to its transmission nor to the algorithms used to produce the data within. The method of transmitting the message between exchange partners is beyond the scope of this document and could be specified in an ICD. The methods used to predict conjunctions and calculate the probability of collision, and the definition of the conjunction assessment accuracy underlying a particular CDM, are also outside the scope of ISO 19389:2014 (the interested reader can consult references in Annex F).