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<TITLE>IGS Real-time Working Group Supports Proposed RTCM State Space Messages (RTCM-SSR)</TITLE>
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<P><FONT FACE="Arial">Author: Mark Caissy</FONT>
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<P><FONT FACE="Arial">Dear Colleagues,</FONT>
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<P><FONT FACE="Arial">The RTCM SC 104 is now voting on proposed State Space Represenation (RTCM-SSR) messages. The voting deadline is November 3, 2010. The Real-time IGS is a strong supporter of the proposed messages and encourages all RTCM SC-104 members to vote to adopt these messages as an RTCM standard.</FONT></P>
<P><FONT FACE="Arial">Background</FONT>
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<P><FONT FACE="Arial">Internationally adopted standards are important to the IGS's success. This is demonstrated by the IGS's current work within RTCM to develop a high precision GNSS data format and the IGS Real-time Pilot Project's adoption of the proposed RTCM-SSR messages with the expectation that they will become an RTCM standard. To increase the likelihood of their adoption, members of the pilot project have worked closely with GEO++ who, within RTCM, has sponsored and documented the RTCM-SSR suite of messages.</FONT></P>
<P><FONT FACE="Arial">Presently, within the IGS real-time pilot project analysis centres are generating RTCM-SSR formatted GNSS orbit and clock corrections and these individual analysis centre solutions are being combined into a prototype IGS real-time GNSS correction product. It is planned that in the near future a real-time IGS service will use the NTRIP protocol to deliver these GNSS corrections using the RTCM-SSR suite of messages.</FONT></P>
<P><FONT FACE="Arial">The Real-time IGS Working Group has a significant investment in the use of the RTCM-SSR messages and I encourage all RTCM members to vote before the November 3rd deadline to adopt these proposed messages as an RTCM standard for the delivery of GNSS State Spaced Correction messages.</FONT></P>
<P><FONT FACE="Courier New">Best regards,</FONT>
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<P><FONT FACE="Courier New">Mark Caissy</FONT>
<BR><FONT FACE="Courier New">Chair IGS Real-time Working Group</FONT>
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