標準解讀
《GB/T 44175.1-2024全球連續監測評估系統(iGMAS)實時服務 第1部分：數據流格式》這一標準文件，主要規定了全球連續監測評估系統(iGMAS)在提供實時服務時，數據傳輸與交換的具體格式要求。iGMAS作為一個全球性的監測網絡，其目標在于實現對地球空間環境的連續觀測和評估，為各種應用領域如導航定位、氣象預報、地質災害預警等提供精確及時的數據支持。
該標準詳細闡述了以下幾個關鍵方面：
-
數據結構定義：明確了數據包的構成要素，包括但不限于數據頭、數據體以及可能存在的校驗信息等，確保數據在傳輸過程中的完整性和正確性。每個部分的具體內容、編碼規則及長度限制都有詳細說明，便于接收端正確解析。
-
實時服務數據類型：規范了iGMAS系統提供的各類實時數據類型，比如衛星軌道參數、時間同步信號、空間環境監測數據（如電離層狀態、地磁活動等）。對于每種數據類型，標準都規定了其特有的數據格式和表示方法。
-
傳輸協議與接口規范：指定了數據傳輸所遵循的通信協議（如TCP/IP）以及數據交互的接口標準，確保不同系統間的數據能夠順暢對接和互操作。
-
實時性要求：針對實時服務特性，設定了數據生成到送達用戶端的時間延遲上限，保證數據的時效性滿足應用需求。
-
錯誤處理與恢復機制：描述了數據傳輸過程中可能出現的錯誤類型及其處理方式，包括數據包丟失、損壞時的重傳機制，確保服務的穩定性和可靠性。
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安全與隱私保護：雖然未直接提及，但隱含要求數據傳輸應遵循相關的安全標準和加密措施，保護數據在傳輸過程中的安全性和用戶的隱私信息。
如需獲取更多詳盡信息，請直接參考下方經官方授權發布的權威標準文檔。
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文檔簡介
ICS
49.020
CCS
V04
中華人民共和國國家標準
GB/T44175.1—2024
全球連續監測評估系統（iGMAS）
實時服務第1部分:數據流格式
Real-timeserviceofinternationalGNSSmonitoringandassessmentsystem
(iGMAS)—Part1:Datastreamformat
2024-07-24發布2024-07-24實施
國家市場監督管理總局發布
國家標準化管理委員會
GB/T44175.1—2024
目次
前言
·····································································································
Ⅲ
引言
·····································································································
Ⅳ
1
范圍
··································································································
1
2
規范性引用文件
······················································································
1
3
術語、定義和縮略語
·················································································
1
3.1
術語和定義
······················································································
1
3.2
縮略語
···························································································
1
4
總則
··································································································
2
4.1
信息類型
·························································································
2
4.2
信息結構
·························································································
3
4.3
數據字段
·························································································
4
5
系統參數信息格式
····················································································
9
6
天線參考點信息格式
·················································································
9
7
接收機和天線信息格式
···············································································
9
8
GNSS觀測數據信息格式
·············································································
9
9
GNSS導航數據信息格式
·············································································
9
9.1
BDS導航數據信息
···············································································
9
9.2
GPS導航數據信息
··············································································
13
9.3
GLONASS導航數據信息
·······································································
14
9.4
Galileo導航數據信息
···········································································
14
10
GNSS電離層參數信息格式
········································································
14
10.1
BDS電離層參數信息
··········································································
14
10.2
GPS電離層參數信息
··········································································
15
10.3
Galileo電離層參數信息
········································································
15
11
BDS?2完好性及差分信息格式
·····································································
16
12
氣象數據信息格式
·················································································
17
13
時差測量數據信息格式
·············································································
17
14
GNSS健康狀態信息格式
··········································································
17
14.1
通用格式
······················································································
18
14.2
BDS健康狀態信息
············································································
18
14.3
GPS健康狀態信息
············································································
18
14.4
GLONASS健康狀態信息
······································································
18
14.5
Galileo健康狀態信息
··········································································
18
附錄A（規范性）
RTCMSTANDARD10403.3?2022規定的格式
································
19
Ⅰ
GB/T44175.1—2024
A.1
數據流數據字段
················································································
19
A.2
數據類型
·······················································································
30
A.3
系統參數信息格式
·············································································
32
A.4
天線參考點信息格式
···········································································
32
A.5
接收機和天線信息格式
········································································
33
A.6
GNSS觀測數據信息格式
······································································
33
A.7
GNSS導航數據信息格式
······································································
40
附錄B（規范性）
CRC?24Q校驗算法
······························································
47
參考文獻
·······························································································
48
Ⅱ
GB/T44175.1—2024
前言
本文件按照GB/T1.1—2020《標準化工作導則第1部分：標準化文件的結構和起草規則》的規
定起草。
本文件是GB/T44175《全球連續監測評估系統（iGMAS）實時服務》的第1部分。GB/T44175已經發
布了以下部分：
—第1部分：數據流格式；
—第2部分：產品格式。
請注意本文件的某些內容可能涉及專利。本文件的發布機構不承擔識別專利的責任。
本文件由中央軍委裝備發展部提出。
本文件由全國北斗衛星導航標準化技術委員會（SAC/TC544）歸口。
本文件起草單位：中國航天時代電子有限公司、中國衛星導航工程中心、中國地震局地震預測研究
所、武漢大學、中國科學院國家授時中心、中國人民解放軍國防科技大學、中國電科網絡通信研究院。
本文件主要起草人：陳海龍、李冬、焦文海、劉瑩、王凱、孫漢榮、蘇牡丹、蔡洪亮、劉暉、
周巍、胡志剛、張喆、余意、秦明峰、張建偉。
Ⅲ
GB/T44175.1—2024
引言
全球連續監測評估系統（iGMAS）實時服務是全球連續監測評估系統的特色服務之一。其主要應用
價值在于GNSS用戶能夠通過實時服務開展高精度實時定位應用。為了滿足全球連續監測評估系統實時
數據和精密定位服務改正數的交換和處理需求，制定GB/T44175《全球連續監測評估系統
（iGMAS）實時服務》，擬由兩個部分構成。
—第1部分：數據流格式。目的在于規定全球連續監測評估系統向GNSS用戶提供實時數據流的
格式。
—第2部分：產品格式。目的在于規定全球連續監測評估系統向GNSS用戶提供實時產品的格式。
Ⅳ
GB/T44175.1—2024
全球連續監測評估系統（iGMAS）
實時服務第1部分:數據流格式
1范圍
本文件規定了全球連續監測評估系統實時服務數據流的信息類型、信息結構、數據字段和信息
格式。
本文件適用于全球連續監測評估系統跟蹤站觀測數據數據流的采集、存儲、處理和交換等工作，也
適用于GNSS測量接收機的研制、生產、測試及GNSS觀測實時數據流的使用。
2規范性引用文件
下列文件中的內容通過文中的規范性引用而構成本文件必不可少的條款。其中，注日期的引用文
件，僅該日期對應的版本適用于本文件；不注日期的引用文件，其最新版本（包含所有的修改單）適用
于本文件。
GB/T27606—2020GNSS接收機數據自主交換格式
G
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