《RTCM报文详细介绍.ppt》由会员分享，可在线阅读，更多相关《RTCM报文详细介绍.ppt（24页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、,RTCM Data Format (Radio Technical Commission for Maritime Services),RINEX Raw GPS static data format for data processing and archive NMEA Standard related to data communication between marine electronic devices. Transmission of GPS position from GPS receiver to other devices (e.g. GPS receiver to P
2、DA) For real time positioning RTCM SC-104 Transmission of GPS correction from GPS reference station to GPS Rover For DGPS/RTK surveys,Overview of Common GPS Data Format,Outline,Example of using RTCM Data Format About RTCM RTCM Data Structure RTCM Message Types,RTCM using in SatRef,SatRef System DGPS
3、 Single-RTK Network-RTK All GPS corrections from SatRef are in RTCM-2.1 data format.,About RTCM,Radio Technical Commission for Maritime Services,Various Special Committees set the standards for International maritime radionavigation and radiocommunication Examples: GPS Applications Electronic Charts
4、.,What is RTCM SC-104 ?,RTCM Special Committee (SC) 104 is the one concerned GPS correction signal. RTCM data format related to GPS corrections is called RTCM SC-104 data format. Compact binary data good for real-time processing,What is RTCM SC-104 ?,Different versions RTCM-2.0 (Code correction -DGP
5、S) RTCM-2.1 (Code + Phase correction - RTK) RTCM 2.2 ( + GLONASS ) RTCM 2.3 ( .+ GPS Antenna Definition) RTCM 3.0 (.+ Network RTK & GNSS),RTCM Data Structure (Versions 2.0-2.3),RTCM Data Structure,Each data record contains several message types for various contents. Message 1, Message2. Message N Ea
6、ch message comprises header and body Header: message type, time, length of message, Body: data for every data type,RTCM Message Types(Versions 2.0-2.3),RTCM Message Types,RTCM Message Types,18-21 messages added in RTCM2.1,23-24 messages added in RTCM2.3,31-36 messages added in RTCM2.2,RTCM Message T
7、ypes,31-36 messages added in RTCM2.2,RTCM Raw Data,Binary data,RTCM Message Type 1,1. Pseudorange Corr. 2. Range Rate Corr.,RTCM Message Type 3+22,RTCM Message Type 20,RTCM Message Type 21,RTCM version 3.0,RTCM 3.0 New data structure developed for network RTK applications. new signals L2C and L5 GNS
8、S system data Compact Data Structure RTCM 2.0 0.5 kbit / sec. (DGPS) RTCM 2.1-2.3 requires 5 kbit / sec (DGPS+RTK) RTCM 3.0.requires 2 kbit / sec,RTCM version 3.0,Four Groups of RTCM 3.0 GNSS RTK messages (RTCM 2004),References,RTCM Recommended Standards for Differential NAVSTAR GPS service www.navcen.uscg.gov/pubs/dgps/rctm104/Default.htm RTCM Official Website http:/www.rtcm.org/ DGPS Data Formats 2.0 www.geopp.de/download/DGPS-data-formats2.pdf Reference Station Network Information Distribution work-rtk.info/euler/euler.html,The EndThank you!,