標準解讀
《GB/T 44175.1-2024全球連續(xù)監(jiān)測評估系統(tǒng)(iGMAS)實時服務 第1部分：數(shù)據(jù)流格式》這一標準文件，主要規(guī)定了全球連續(xù)監(jiān)測評估系統(tǒng)(iGMAS)在提供實時服務時，數(shù)據(jù)傳輸與交換的具體格式要求。iGMAS作為一個全球性的監(jiān)測網(wǎng)絡，其目標在于實現(xiàn)對地球空間環(huán)境的連續(xù)觀測和評估，為各種應用領(lǐng)域如導航定位、氣象預報、地質(zhì)災害預警等提供精確及時的數(shù)據(jù)支持。
該標準詳細闡述了以下幾個關(guān)鍵方面：
-
數(shù)據(jù)結(jié)構(gòu)定義：明確了數(shù)據(jù)包的構(gòu)成要素，包括但不限于數(shù)據(jù)頭、數(shù)據(jù)體以及可能存在的校驗信息等，確保數(shù)據(jù)在傳輸過程中的完整性和正確性。每個部分的具體內(nèi)容、編碼規(guī)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(shù)據(jù)類型：規(guī)范了iGMAS系統(tǒng)提供的各類實時數(shù)據(jù)類型，比如衛(wèi)星軌道參數(shù)、時間同步信號、空間環(huán)境監(jiān)測數(shù)據(jù)（如電離層狀態(tài)、地磁活動等）。對于每種數(shù)據(jù)類型，標準都規(guī)定了其特有的數(shù)據(jù)格式和表示方法。
-
傳輸協(xié)議與接口規(guī)范：指定了數(shù)據(jù)傳輸所遵循的通信協(xié)議（如TCP/IP）以及數(shù)據(jù)交互的接口標準，確保不同系統(tǒng)間的數(shù)據(jù)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(shù)據(jù)生成到送達用戶端的時間延遲上限，保證數(shù)據(jù)的時效性滿足應用需求。
-
錯誤處理與恢復機制：描述了數(shù)據(jù)傳輸過程中可能出現(xiàn)的錯誤類型及其處理方式，包括數(shù)據(jù)包丟失、損壞時的重傳機制，確保服務的穩(wěn)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(shù)據(jù)傳輸應遵循相關(guān)的安全標準和加密措施，保護數(shù)據(jù)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(jīng)官方授權(quán)發(fā)布的權(quán)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(xù)監(jiān)測評估系統(tǒng)（iGMAS）
實時服務第1部分:數(shù)據(jù)流格式
Real-timeserviceofinternationalGNSSmonitoringandassessmentsystem
(iGMAS)—Part1:Datastreamformat
2024-07-24發(fā)布2024-07-24實施
國家市場監(jiān)督管理總局發(fā)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(guī)范性引用文件
······················································································
1
3
術(shù)語、定義和縮略語
·················································································
1
3.1
術(shù)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(jié)構(gòu)
·························································································
3
4.3
數(shù)據(jù)字段
·························································································
4
5
系統(tǒng)參數(shù)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(shù)據(jù)信息格式
·············································································
9
9
GNSS導航數(shù)據(jù)信息格式
·············································································
9
9.1
BDS導航數(shù)據(jù)信息
···············································································
9
9.2
GPS導航數(shù)據(jù)信息
··············································································
13
9.3
GLONASS導航數(shù)據(jù)信息
·······································································
14
9.4
Galileo導航數(shù)據(jù)信息
···········································································
14
10
GNSS電離層參數(shù)信息格式
········································································
14
10.1
BDS電離層參數(shù)信息
··········································································
14
10.2
GPS電離層參數(shù)信息
··········································································
15
10.3
Galileo電離層參數(shù)信息
········································································
15
11
BDS?2完好性及差分信息格式
·····································································
16
12
氣象數(shù)據(jù)信息格式
·················································································
17
13
時差測量數(shù)據(jù)信息格式
·············································································
17
14
GNSS健康狀態(tài)信息格式
··········································································
17
14.1
通用格式
······················································································
18
14.2
BDS健康狀態(tài)信息
············································································
18
14.3
GPS健康狀態(tài)信息
············································································
18
14.4
GLONASS健康狀態(tài)信息
······································································
18
14.5
Galileo健康狀態(tài)信息
··········································································
18
附錄A（規(guī)范性）
RTCMSTANDARD10403.3?2022規(guī)定的格式
································
19
Ⅰ
GB/T44175.1—2024
A.1
數(shù)據(jù)流數(shù)據(jù)字段
················································································
19
A.2
數(shù)據(jù)類型
·······················································································
30
A.3
系統(tǒng)參數(shù)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(shù)據(jù)信息格式
······································································
33
A.7
GNSS導航數(shù)據(jù)信息格式
······································································
40
附錄B（規(guī)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(jié)構(gòu)和起草規(guī)則》的規(guī)
定起草。
本文件是GB/T44175《全球連續(xù)監(jiān)測評估系統(tǒng)（iGMAS）實時服務》的第1部分。GB/T44175已經(jīng)發(fā)
布了以下部分：
—第1部分：數(shù)據(jù)流格式；
—第2部分：產(chǎn)品格式。
請注意本文件的某些內(nèi)容可能涉及專利。本文件的發(fā)布機構(gòu)不承擔識別專利的責任。
本文件由中央軍委裝備發(fā)展部提出。
本文件由全國北斗衛(wèi)星導航標準化技術(shù)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(wèi)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(wǎng)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(xù)監(jiān)測評估系統(tǒng)（iGMAS）實時服務是全球連續(xù)監(jiān)測評估系統(tǒng)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(xù)監(jiān)測評估系統(tǒng)實時
數(shù)據(jù)和精密定位服務改正數(shù)的交換和處理需求，制定GB/T44175《全球連續(xù)監(jiān)測評估系統(tǒng)
（iGMAS）實時服務》，擬由兩個部分構(gòu)成。
—第1部分：數(shù)據(jù)流格式。目的在于規(guī)定全球連續(xù)監(jiān)測評估系統(tǒng)向GNSS用戶提供實時數(shù)據(jù)流的
格式。
—第2部分：產(chǎn)品格式。目的在于規(guī)定全球連續(xù)監(jiān)測評估系統(tǒng)向GNSS用戶提供實時產(chǎn)品的格式。
Ⅳ
GB/T44175.1—2024
全球連續(xù)監(jiān)測評估系統(tǒng)（iGMAS）
實時服務第1部分:數(shù)據(jù)流格式
1范圍
本文件規(guī)定了全球連續(xù)監(jiān)測評估系統(tǒng)實時服務數(shù)據(jù)流的信息類型、信息結(jié)構(gòu)、數(shù)據(jù)字段和信息
格式。
本文件適用于全球連續(xù)監(jiān)測評估系統(tǒng)跟蹤站觀測數(shù)據(jù)數(shù)據(jù)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(chǎn)、測試及GNSS觀測實時數(shù)據(jù)流的使用。
2規(guī)范性引用文件
下列文件中的內(nèi)容通過文中的規(guī)范性引用而構(gòu)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(shù)據(jù)自主交換格式
G
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