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RTCM 10403.2
RTCM Paper 104-2013-SC104-STD
with Amendment 1
RTCM Paper 151-2013-SC104-STD
RTCM STANDARD 10403.2
DIFFERENTIAL GNSS
(GLOBAL NAVIGATION SATELLITE SYSTEMS)
SERVICES – VERSION 3
DEVELOPED BY
RTCM SPECIAL COMMITTEE NO. 104
JULY 12, 2013
COPYRIGHT©2013 RTCM
Radio Technical Commission for Maritime Services
1611 N. Kent St., Suite 605
Arlington, Virginia 22209-2143, U.S.A.
E-Mail: info@rtcm.org
Web Site: http:/www.rtcm.org
© RTCM – Not for reproduction or redistribution
The Radio Technical Commission For Maritime Services (RTCM) is an incorporated non-profit
organization, with participation in its work by international representation from both government and non-
government organizations. The RTCM does not work to induce sales, it does not test or endorse
products, and it does not monitor or enforce the use of its standards.
The RTCM does not engage in the design, sale, manufacture or distribution of equipment or in any way
control the use of this standard by any manufacturer, service provider, or user. Use of, and adherence to,
this standard is entirely within the control and discretion of each manufacturer, service provider, and user.
For information on RTCM Documents or on
participation in development of future RTCM documents contact:
Radio Technical Commission For Maritime Services
1611 N. Kent St., Suite 605
Arlington, Virginia 22209-2143 USA
Telephone: +1-703-527-2000
Telefax: +1-703-351-9932
E-Mail: info@rtcm.org
© RTCM – Not for reproduction or redistribution
RTCM 10403.2
RTCM Paper 104-2013-SC104-STD
with Amendment 1
RTCM Paper 151-2013-SC104-STD
RTCM STANDARD 10403.2
DIFFERENTIAL GNSS
(GLOBAL NAVIGATION SATELLITE SYSTEMS)
SERVICES – VERSION 3
DEVELOPED BY
RTCM SPECIAL COMMITTEE NO. 104
JULY 12, 2013
COPYRIGHT©2013 RTCM
Radio Technical Commission for Maritime Services
1611 N. Kent St., Suite 605
Arlington, Virginia 22209-2143, U.S.A.
E-Mail: info@rtcm.org
Web Site: http:/www.rtcm.org
© RTCM – Not for reproduction or redistribution
This page intentionally left blank
© RTCM – Not for reproduction or redistribution
RTCM 10403.2
i
PREFACE
This standard has been developed by RTCM Special Committee 104 as a more efficient
alternative to Version 2 in various documents entitled "RTCM Recommended Standards for
Differential Navstar GPS Service, Version 2.x”. Service providers and vendors represented on
the SC-104 Committee requested the development of a new standard that would be more
efficient, easy to use, and more easily adaptable to new situations. The main complaint was that
the Version 2 parity scheme, which uses words with 24 bits of data followed by 6 bits of parity,
was wasteful of bandwidth. Another complaint was that the parity was not independent from
word to word. Still another was that even with so many bits devoted to parity, the actual
integrity of the message was not as high as it should be. Plus, 30-bit words are awkward to
handle. This standard, Version 3, is intended to correct these weaknesses.
Unlike Version 2, the Version 3 standards do not include tentative messages. The messages in
Version 3 have undergone testing for validity and interoperability, and are considered to be
permanent. Future modifications of the standard may change the meaning of reserved bits or
provide additional clarifying text, but no changes will be made in the data fields. Changes will
require new messages to be developed. As new messages and capabilities have been
demonstrated through validity and interoperability testing, they will be incorporated into future
revisions of the Version 3 standard, either as amendments or as a new revision of standard
10403.x. Amendments will be made available electronically to those who have purchased the
standard. Periodically, accumulated Amendments will be incorporated into a complete revision
of standard 10403.x.
RTCM SC-104 believes that Standard 10403.2 for DGNSS services will continue to prove useful
in supporting highly accurate differential and kinematic positioning as well as a wide range of
navigation applications worldwide throughout the next decade.
© RTCM – Not for reproduction or redistribution
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