标准解读
《GB/T 44175.1-2024全球连续监测评估系统(iGMAS)实时服务 第1部分：数据流格式》这一标准文件，主要规定了全球连续监测评估系统(iGMAS)在提供实时服务时，数据传输与交换的具体格式要求。iGMAS作为一个全球性的监测网络，其目标在于实现对地球空间环境的连续观测和评估，为各种应用领域如导航定位、气象预报、地质灾害预警等提供精确及时的数据支持。
该标准详细阐述了以下几个关键方面：
-
数据结构定义：明确了数据包的构成要素，包括但不限于数据头、数据体以及可能存在的校验信息等，确保数据在传输过程中的完整性和正确性。每个部分的具体内容、编码规则及长度限制都有详细说明，便于接收端正确解析。
-
实时服务数据类型：规范了iGMAS系统提供的各类实时数据类型，比如卫星轨道参数、时间同步信号、空间环境监测数据（如电离层状态、地磁活动等）。对于每种数据类型，标准都规定了其特有的数据格式和表示方法。
-
传输协议与接口规范：指定了数据传输所遵循的通信协议（如TCP/IP）以及数据交互的接口标准，确保不同系统间的数据能够顺畅对接和互操作。
-
实时性要求：针对实时服务特性，设定了数据生成到送达用户端的时间延迟上限，保证数据的时效性满足应用需求。
-
错误处理与恢复机制：描述了数据传输过程中可能出现的错误类型及其处理方式，包括数据包丢失、损坏时的重传机制，确保服务的稳定性和可靠性。
-
安全与隐私保护：虽然未直接提及，但隐含要求数据传输应遵循相关的安全标准和加密措施，保护数据在传输过程中的安全性和用户的隐私信息。
如需获取更多详尽信息，请直接参考下方经官方授权发布的权威标准文档。
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文档简介
ICS
49.020
CCS
V04
中华人民共和国国家标准
GB/T44175.1—2024
全球连续监测评估系统（iGMAS）
实时服务第1部分:数据流格式
Real-timeserviceofinternationalGNSSmonitoringandassessmentsystem
(iGMAS)—Part1:Datastreamformat
2024-07-24发布2024-07-24实施
国家市场监督管理总局发布
国家标准化管理委员会
GB/T44175.1—2024
目次
前言
·····································································································
Ⅲ
引言
·····································································································
Ⅳ
1
范围
··································································································
1
2
规范性引用文件
······················································································
1
3
术语、定义和缩略语
·················································································
1
3.1
术语和定义
······················································································
1
3.2
缩略语
···························································································
1
4
总则
··································································································
2
4.1
信息类型
·························································································
2
4.2
信息结构
·························································································
3
4.3
数据字段
·························································································
4
5
系统参数信息格式
····················································································
9
6
天线参考点信息格式
·················································································
9
7
接收机和天线信息格式
···············································································
9
8
GNSS观测数据信息格式
·············································································
9
9
GNSS导航数据信息格式
·············································································
9
9.1
BDS导航数据信息
···············································································
9
9.2
GPS导航数据信息
··············································································
13
9.3
GLONASS导航数据信息
·······································································
14
9.4
Galileo导航数据信息
···········································································
14
10
GNSS电离层参数信息格式
········································································
14
10.1
BDS电离层参数信息
··········································································
14
10.2
GPS电离层参数信息
··········································································
15
10.3
Galileo电离层参数信息
········································································
15
11
BDS﹘2完好性及差分信息格式
·····································································
16
12
气象数据信息格式
·················································································
17
13
时差测量数据信息格式
·············································································
17
14
GNSS健康状态信息格式
··········································································
17
14.1
通用格式
······················································································
18
14.2
BDS健康状态信息
············································································
18
14.3
GPS健康状态信息
············································································
18
14.4
GLONASS健康状态信息
······································································
18
14.5
Galileo健康状态信息
··········································································
18
附录A（规范性）
RTCMSTANDARD10403.3﹘2022规定的格式
································
19
Ⅰ
GB/T44175.1—2024
A.1
数据流数据字段
················································································
19
A.2
数据类型
·······················································································
30
A.3
系统参数信息格式
·············································································
32
A.4
天线参考点信息格式
···········································································
32
A.5
接收机和天线信息格式
········································································
33
A.6
GNSS观测数据信息格式
······································································
33
A.7
GNSS导航数据信息格式
······································································
40
附录B（规范性）
CRC﹘24Q校验算法
······························································
47
参考文献
·······························································································
48
Ⅱ
GB/T44175.1—2024
前言
本文件按照GB/T1.1—2020《标准化工作导则第1部分：标准化文件的结构和起草规则》的规
定起草。
本文件是GB/T44175《全球连续监测评估系统（iGMAS）实时服务》的第1部分。GB/T44175已经发
布了以下部分：
—第1部分：数据流格式；
—第2部分：产品格式。
请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别专利的责任。
本文件由中央军委装备发展部提出。
本文件由全国北斗卫星导航标准化技术委员会（SAC/TC544）归口。
本文件起草单位：中国航天时代电子有限公司、中国卫星导航工程中心、中国地震局地震预测研究
所、武汉大学、中国科学院国家授时中心、中国人民解放军国防科技大学、中国电科网络通信研究院。
本文件主要起草人：陈海龙、李冬、焦文海、刘莹、王凯、孙汉荣、苏牡丹、蔡洪亮、刘晖、
周巍、胡志刚、张喆、余意、秦明峰、张建伟。
Ⅲ
GB/T44175.1—2024
引言
全球连续监测评估系统（iGMAS）实时服务是全球连续监测评估系统的特色服务之一。其主要应用
价值在于GNSS用户能够通过实时服务开展高精度实时定位应用。为了满足全球连续监测评估系统实时
数据和精密定位服务改正数的交换和处理需求，制定GB/T44175《全球连续监测评估系统
（iGMAS）实时服务》，拟由两个部分构成。
—第1部分：数据流格式。目的在于规定全球连续监测评估系统向GNSS用户提供实时数据流的
格式。
—第2部分：产品格式。目的在于规定全球连续监测评估系统向GNSS用户提供实时产品的格式。
Ⅳ
GB/T44175.1—2024
全球连续监测评估系统（iGMAS）
实时服务第1部分:数据流格式
1范围
本文件规定了全球连续监测评估系统实时服务数据流的信息类型、信息结构、数据字段和信息
格式。
本文件适用于全球连续监测评估系统跟踪站观测数据数据流的采集、存储、处理和交换等工作，也
适用于GNSS测量接收机的研制、生产、测试及GNSS观测实时数据流的使用。
2规范性引用文件
下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。其中，注日期的引用文
件，仅该日期对应的版本适用于本文件；不注日期的引用文件，其最新版本（包含所有的修改单）适用
于本文件。
GB/T27606—2020GNSS接收机数据自主交换格式
G
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