解析rtcm32报文工具_RTCM报文详细介绍.ppt

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 PDA) For real time positioning RTCM SC-104 Transmission of GPS correction from GPS reference station to GPS Rover For DGPS/RTK surveys Outline Example of using RTCM Data Format About RTCM RTCM Data Structure RTCM Message Types RTCM using in SatRef SatRef System DGPS Single-RTK Network-RTK All GPS corrections from SatRef are in RTCM-2.1 data format. Radio Technical Commission for Maritime Services Various Special Committees set the standards for International maritime radionavigation and radiocommunication Examples: GPS Applications Electronic Charts….. 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 ->DGPS) 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 Each data record contains several message types for various contents. Message 1, Message2…. Message N Each 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 RTCM Message Types RTCM Raw 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 version 3.0 RTCM 3.0 New data structure developed for network RTK applications. new signals L2C and L5 GNSS system data Compact Data Structure RTCM 2.0

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