GPX Exchange Format GPX (the GPS Exchange Format) is a light-weight Using time-division multiple access in the VHF maritime mobile band The official standard descrcribing AIS. : Technical characteristics for an automatic identification system Information on AIS and its addenda remains otherwise difficult toĬollect from scattered and rather impenetrable standards The core AIVDM standard is no longer evil (see below), but complete AIVDM/AIVDO protocol decoding This document describes AIVDM, a standard layered on top of NMEAĠ183 and used for the marine Automatic Identification System (AIS). Implementations, it is however possible to develop a working NtripĬlient. (missing in the online version) and the C and Perl reference With the help of examples in the official standard Written, confusing and leaves too much open to the interpretation of The distribution terms for the NTRIP standardĪre evil, but a stripped down version of the document is freelyĪvailable on the home page. Ntrip home page NTRIP is a protocol for shipping DGPS corrections that uses HTTPĪs a transport layer. ICD (2010) This is issue 1 revision 1 0 of the Galileo Open Service Signal In Space Unfortunately, its distribution terms are also evil. Rtcm-104, the specification used for broadcasting differential-gpsĬorrections. ITU-R M.823-2 This specification documents some of the murky depths of
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Official copies, so we do have full details of the message format.Ĭopies of some of these have leaked onto the Web and may be found byġ0403.1". At least one of the GPSD project members has purchased Recommended Standards for Differential GNSS This is the ordering page for the official RTCM SC-104 standards,īoth the obsolescent 2.x and current 3.x versions. WAAS System Specification This is the official specification for the FAA's Wide Area World Geodetic System Technical and historical summary of WGS84. Government makesĪvailable to civil users through the GPS Standard Positioning Service Performance Specification (2008) This document defines the levels of performance the U.S. Be warned: though this specification is not evil, it Unless you are trying to make sense of the raw 50BPS subframeĭata. Global Positioning Interface Specification IS-GPS-200J (2018) This is the official specification for interpreting radio Information on vendor-specific quirks that we don't. NMEA data This is one of the sources for the above. Read it and/or studied the behavior of GPSes claiming to conform to That standard from various Web resources written by people who have Project has collated comprehensive information on the prescriptions of NMEA sentences Because the NMEA 0183 standard itself is extremely evil, the GPSD Consequently, nobody on the GPSD project has ever The distribution termsĪre extremely evil.
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Report to computers over a serial or USB link. GPS standards NMEA 0183 This is the official standard from the National MaritimeĮlectronics Association describing how GPSes are supposed to This was a selection of the files available at GPSD's Google Codeĭocument repository.
Publisher have been known to threaten people who quote it on the The distribution terms evil, but that attack lawyers for the document The phrase "extremely evil" means that not only are
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(a) it is not available for free download, and (b) it cannot legallyīe redistributed. In the descriptions below, the adjective "evil" applied to theĭistribution terms of a standard or technical specification means that This page lists both onsite and offsite resources for programmers
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