1 / 24

RTCM Data Format ( R adio T echnical C ommission for M aritime Services)

RTCM Data Format ( R adio T echnical C ommission for M aritime Services). Overview of Common GPS Data Format. RINEX Raw GPS static data format for data processing and archive NMEA Standard related to data communication between marine electronic devices.

rianne
Télécharger la présentation

RTCM Data Format ( R adio T echnical C ommission for M aritime Services)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. RTCM Data Format (Radio Technical Commission for Maritime Services)

  2. Overview of Common GPS Data Format • 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

  3. Outline • Example of using RTCM Data Format • About RTCM • RTCM Data Structure • RTCM Message Types

  4. RTCM using in SatRef • SatRef System • DGPS • Single-RTK • Network-RTK All GPS corrections from SatRef are in RTCM-2.1 data format.

  5. About RTCM

  6. Radio Technical Commission for Maritime Services • Various Special Committees set the standards for International maritime radionavigation and radiocommunication Examples: • GPS Applications • Electronic Charts…..

  7. 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

  8. 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)

  9. RTCM Data Structure (Versions 2.0-2.3)

  10. 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

  11. RTCM Message Types(Versions 2.0-2.3)

  12. RTCM Message Types

  13. RTCM Message Types 18-21 messages added in RTCM2.1 23-24 messages added in RTCM2.3 31-36 messages added in RTCM2.2

  14. RTCM Message Types 31-36 messages added in RTCM2.2

  15. RTCM Raw Data Binary data

  16. RTCM Message Type 1 1. Pseudorange Corr. 2. Range Rate Corr.

  17. RTCM Message Type 3+22

  18. RTCM Message Type 20

  19. RTCM Message Type 21

  20. RTCM version 3.0

  21. 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 – 0.5 kbit / sec. (DGPS) • RTCM 2.1-2.3 requires 5 kbit / sec (DGPS+RTK) • RTCM 3.0.requires 2 kbit / sec

  22. Four Groups of RTCM 3.0 GNSS RTK messages (RTCM 2004)

  23. 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 http://www.network-rtk.info/euler/euler.html

  24. The EndThank you!

More Related