GPS World, August 2012
THE ALMANAC Navigation Information Service see previous listing DOD associated activities only e mail gps_ support@ schriever af mil GPS Test Center of Expertise https gpstest 46tg af mil webpub general bbs nsf The 746 Test Squadron based at Holloman Air Force Base in New Mexico provides archived almanac data in SEM36 and YUMA formats and a special almanac detailing the short GPS week observed range errors as viewed from the GPS Satellite Reference Station at Holloman Air Force Base constellation status and user advisories Information dates back to 1992 and is available 24 hours a day The site also will soon offer links to the GPS Test Center of Expertise legacy databases For more information Michael P Brown phone 575 679 2863 e mail michael brown@ Holloman af mil U S National Geodetic Survey NGS GPS Orbit Information www ngs noaa gov CORS NOAAs National Geodetic Survey NGS manages a network of Continuously Operating Reference Stations CORS that provide GPS data to support threedimensional positioning meteorology space weather and geophysical applications throughout the United States its territories and a few foreign countries The CORS network is a multi purpose cooperative endeavor involving more than 200 government academic and private organizations NGS partners contribute more than 1900 independently owned and operated stations to the CORS network The primary objective of the CORS Program is to define and maintain the National Spatial Reference System NSRS The CORS Program also Provides free access to GPS data from the CORS network sites Establishes coordinates and velocities of CORS stations with respect to the NSRS Enables users to determine centimeterlevel positions with respect to the NSRS by simultaneously processing their own GNSS data with data from the CORS network Computes GPS satellite orbits to support post processing applications Provides web services for post processing GPS data via its Online Positioning User Service OPUS Calibrates GPS antenna phase center values Establishes guidelines for operating and using active geodetic control networks NGS continually updates its website with new information on the CORS program For more information e mail ngs cors@ noaa gov U S Naval Observatory www usno navy mil USNO time gps The U S Naval Observatory USNO provides GPS timing data and status information For more information Contact Stephen Mitchell phone 202 762 0740 or DSN 762 0740 e mail stephen mitchell@ usno navy mil International International GNSS Service IGS www igs org ftp igscb jpl nasa gov http igscb jpl nasa gov organization centers html The foundation of IGS is a global network of more than 350 permanent continuously operating geodetic quality GPS and GPS GLONASS sites The station data are archived at four global data centers and six regional data centers Ten analysis centers regularly process the data and contribute products to the analysis center coordinator who produces the official IGS combined orbit and clock products Timescale ionospheric and tropospheric products are analogously formed by specialized coordinators for each The IGS reference frame coordinator determines tracking site coordinates and velocities from analysis centers solutions and organizes the IGS contribution to the International Terrestrial Reference Frame ITRF The IGS Central Bureau is responsible for day to day management of the IGS following policies set by the IGS International Governing Board as well as for communication and outreach More than 200 institutions and organizations in more than 90 countries contribute to the IGS a service established within the International Association of Geodesy since 1994 The IGS intends to integrate future GNSS signals such as Galileo into its activities as demonstrated by the successful incorporation of GLONASS For more information Contact International GNSS Service Central Bureau Jet Propulsion Lab MS 238 540 Pasadena CA 91109 USA phone 818 354 2077 fax 818 393 6686 email cb@ igs org Australia www ga gov au Geoscience Australia is Australias national agency for geoscience research and geospatial information It maintains a comprehensive Web site with information about many GPS related topics Users can download data from the Australian Regional GPS Network and view graphs of data quality and time series of positions An online GPS processing service AUSPOS allows users to upload dual frequency Rinex data and receive computed ITRF positions rapidly by e mail Within Australia these ITRF positions are also transformed to the Geocentric Datum of Australia The site provides information about Australian coordinates datums and transformations Geoid ellipsoid separations for the region can be downloaded or computed on line For more information Contact Geoscience Australia phone 61 2 6249 9111 fax 61 2 6249 9929 e mail geodesy@ ga gov au Czech Republic http radio feld cvut cz RSRDC doku php id almanacs ftp merope feld cvut cz pub almanac The Czech Technical University Faculty of Electrical Engineering Department of Radio Engineering in Prague Czech Republic offers historical constellation status and almanac data for both GPS and GLONASS systems For more information E mail service administrator at pavel puricer@ fel cvut cz or contact Frantisek Vejrazka Czech Technical University Technicka 2 166 27 Prague 6 Czech Republic phone 420 2 2435 2246 fax 420 2 3333 9801 e mail vejrazka@ feld cvut cz Denmark www kms dk Kort og Matrikelstyrelsen National Survey and Cadastre Denmark provides GPS raw carrier phase data by request and maintains the following services NAV DK and Code corrections distributed by way of cellular telephony These services are based on the permanent reference station network for GPS operated by the National Survey and Cadastre Denmark For more information Contact Casper Jepsen or Bo Hansen Kort and Matrikelstyrelsen Rentemestervej 8 DK 2400 Copenhagen NV Denmark phone 45 72 54 50 00 fax 45 35 87 50 51 e mail kms@ kms dk Russia www glonass ianc rsa ru The Information Analytical Center IAC of the Russian Space Agency publishes official information about GLONASS status and plans as well as consultation information and scientific method services to increase GLONASS applications efficiency It provides current constellations Earth maps of the current and daily navigation availabilities results of GNSS navigation field monitoring in the Moscow area in a real time mode and other data For more information IAC Mission Control Center e mail glonass ianc@ mcc rsa ru www gpsworld com August 2012 GPS World 49
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