Message-Id: Date: Thu, 20 Mar 2003 11:20:53 -0800 To: CSRC General Mail , SCIGN Mail , igsmail@igscb.jpl.nasa.gov, UNAVCO Mail From: Yehuda Bock Subject: [IGSMAIL-4317]: Real Time Data Cc: John Canas , AndrewA@pfrd.co.orange.ca.us, Cecilia Whitaker , Mike Duffy , Ken Hudnut , Frank Webb , Bill Young , Nancy King , Greg Helmer , James Swanson , Mark Murray , Michael Scharber , Brent Gilmore , Paul Jamason , David Malveaux , Peng Fang , Linette Prawirodirdjo , Susie Pike Humphrey Sender: owner-igsmail Precedence: bulk ****************************************************************************** IGS Electronic Mail 20 Mar 11:18:17 PST 2003 Message Number 4317 ****************************************************************************** Author: Yehuda Bock There is an effort underway to upgrade continuous GPS sites in California to high-rate (1Hz) sampling, low-latency (<1 sec) data dissemination ("real-time") as collaboration between the California Spatial Reference Center (CSRC) and the scientific arrays (e.g., BARD, SCIGN). There are numerous scientific, societal, and commercial benefits to real-time data. SOPAC is actively collecting and archiving real-time data from two dense SCIGN sub-networks in southern California. The first network includes sites in Orange County (9 sites of the Orange County Real Time Network, with 2 more built but not yet on line), one site in San Diego County (SIO5), and 7 sites in Riverside County to monitor deformation of three earthen dams at Diamond Valley Lake (DVL), operated by the Metropolitan Water District. The OCRTN is now operational and data are now being used by surveyors for wireless, multiple-station RTK. Typical station spacing is 15 km for OCRTN and several hundred meters to 8 km for DVL. Real-time data from all sites (except DVL) can be accessed through assigned IP and port numbers. In order to access the data in real time you will need to register your incoming IP number with SOPAC (please contact me at ybock@ucsd.edu, until further notice). Data are available in both binary Ashtech MBEN and RTCM version 2.2.formats. We have performed a transatlantic test of this capability with Georg Weber of BKG. Thanks Georg. The high-rate (1 Hz) MBEN data for all sites (including DVL) can be found at ftp://garner.ucsd.edu/pub/highrate/cache/raw/. These data are copied to the archive every 24 hours. Please note that file-naming conventions may change as we develop the system. There is a weekly real time data report on the SOPAC site (http://sopac.ucsd.edu/cgi-bin/showRealTimeReport.cgi) that indicates which data are available, and when new sites come on line. This report is updated every few hours. Any feedback will be appreciated. Acknowledgments: John Canas and Art Andrew (Orange County), Cecilia Whitaker and Mike Duffy (DVL), SCIGN, and CSRC. -- *********************************************** Yehuda Bock e-mail: ybock@ucsd.edu Research Geodesist Phone: (858) 534-5292 & Senior Lecturer Fax: (858) 534-9873 WWW: http://sopac.ucsd.edu/; http://csrc.ucsd.edu/ Director, Scripps Orbit and Permanent Array Center (SOPAC) Director, California Spatial Reference Center (CSRC) Address: University of California San Diego 9500 Gilman Drive Institute of Geophysics and Planetary Physics, Code 0225 La Jolla, CA 92093-0225 FedEx Address: Cecil H. and Ida M. Green Institute of Geophysics and Planetary Physics Scripps Institution of Oceanography 8785 Biological Grade, Room 4208 La Jolla, CA 92037 ***********************************************