GPS World, August 2015
THE ALMANAC GNSS Internet Resources United States and Canada Canadian Space Geodesy Forum http www2 unb ca gge Resources CANSPACE html This University of New Brunswick service presents daily GPS constellation status reports ionospheric disturbance warnings and news and discussion about GPS and other space based positioning systems by way of electronic mail Downloadable files are also available To subscribe e mail the oneline message sub CANSPACE your_ name to listserv@ UNB CA For more information Terry Arsenault or Richard Langley phone 506 453 4698 fax 506 453 4943 e mail se@ unb ca GPS gov The U S government provides the GPS gov website to educate the public about the Global Positioning System and related topics Information includes sections for the general public for Congress for international citizens for professionals and for students The site is maintained by the National Coordination Office for Space Based Positioning Navigation and Timing in coordination with multiple federal agencies DoD GPS Operations Center 2SOPS Constellation Status https gps afspc af mil gpsoc https gps afspc af mil gps The U S Department of Defense DoD GPS Operations Center and the 2nd Space Operations Squadron 2SOPS U S Air Force maintain Internet sites for military and DoD users only civilians are referred to the U S Coast Guards Navigation Information Service The GPS Operations Center provides DOP predictions GPS performance assessments anomaly impact analysis GPS FAQs and other services to meet the needs of GPS users in the field 2SOPS operates a GPS Constellation Status site with scheduled outages user advisories almanac data electronic mail and downloadable files For more information Military Contact GPS Operations Center at DSN 560 2541 or Commercial 719 567 2541 https gps afspc af mil gpsoc Civilians Contact USCG Navigation Center at 703 313 5900 www navcen uscg gov Website POC email gps@ schriever af mil National Executive Committee EXCOM for Space Based Positioning Navigation Timing PNT www gps gov governance excom The EXCOM advises senior national government leadership and coordinates with federal agencies about policy matters concerning GPS its augmentations and related systems The deputy secretaries of Defense and Transportation jointly chair the EXCOM Executive Committee membership includes equivalent level officials from NASA the departments of State Commerce Homeland Security Agriculture Interior and the Joint Chiefs of Staff Components of the Executive Office of the President and other selected agencies participate as observers The National Coordination Office an interagency staff directed by a member of the Senior Executive Service in Washington provides day to day administrative and operational support to the EXCOM The National Space Based PNT Advisory Board operates in an independent advisory capacity for the EXCOM as directed by the National PNT Policy and in accordance with the Federal Advisory Committee Act For information contact National Coordination Office for Space Based PNT Herbert C Hoover Building Rm 2518 1401 Constitution Ave NW Washington D C 20230 phone 202 482 5809 fax 202 482 4429 e mail pnt office@ gps gov National Geospatial Intelligence Agency NGA http earth info nga mil GandG sathtml The NGA Global Positioning System Division Ephemeris Support and Analysis Team maintains a webpage for Department of Defense and civilian users with precise GPS orbit and clock information based on tracking data collected from NGA U S Air Force and IGS stations Daily and weekly precise ephemeris and clock estimate data both center of mass pedata and antenna phase center apcpe are calculated on a 15 minute interval Approximately two years of data are kept at this site with previous data available on request NGA offers a nine day orbit prediction ephemeris along with a daily orbit and clock rapid ephemeris also calculated on a 15 minute interval Earth Orientation Parameter Predictions based on data provided by the U S Naval Observatory are provided EOP coefficients and predictions used by the Air Force GPS Operational Control Segment are calculated each Thursday to go into effect the following Sunday through Saturday each new GPS week Daily EOPs are computed for testing and evaluation to be used in GPS III For more information Duty hours 6 a m 6 p m Mon Fri 314 676 9142 or DSN 846 9142 e mail gps@ nga mil 24 hour contact 314 676 9140 or DSN 846 9140 Natural Resources Canada Canadian Spatial Reference System www geod nrcan gc ca Natural Resources Canada Canadian Geodetic Survey operates the Canadian Active Control System CACS a national network of continuously operating GNSS tracking stations Products derived from CACS include GNSS observation data precise GNSS orbits and precise GNSS clock corrections The system supports the positioning requirements of a broad range of users including the most demanding post mission scientific applications providing coordinates in either the Canadian Spatial Reference System CSRS or the International Terrestrial Reference Frame ITRF An online Precise Point Positioning CSRS PPP service allows GPS users from around the world to recover accurate positions from a single GNSS receiver by submitting their RINEX observation data via the Internet Information about access to CACS data availability and other geodetic products and services is available 24 hours a day from a free online subscription service CSRS Online Database For more information Contact our Geodetic Integrated Services unit 588 Booth Street Ottawa Ontario Canada K1A 0Y7 phone 613 793 2102 fax 613 996 9843 e mail information@ geod nrcan gc ca Scripps Orbit and Permanent Array Center SOPAC http sopac ucsd edu The Scripps Institution of Oceanography University of California San Diego maintains SOPAC which provides precise rapid ultra rapid and hourly orbits for the International GNSS Service IGS and NOAAs Global Systems Division GSD Many GPS related services and tools are available from SOPACs website such as SCOUT a global ITRF Coordi nates Generator Site Information Manager SIM On line Map Interface SOMI and GPS Explorer SOPAC archives 24 hour RINEX data from about 3000 continuous GPS sites from more than 20 scientific networks around the world with a concentration in western North America SOPAC also maintains the operational center for the California Spatial Reference Center and collects and archives high rate 1 Hz low latency 1 second GPS data from stations in California For information about access to real time data streams visit http sopac ucsd edu projects realtime For more information Contact SOPAC Scripps Institution of Oceanography UCSD IGPP 0225 9500 Gilman Drive La Jolla CA 92093 0225 USA call 858 822 2156 fax 858 534 9873 or e mail archive@ gpsmail ucsd edu or Director Yehuda Bock ybock@ ucsd edu U S National Geodetic Survey 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 three dimensional 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 centimeter level 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 For more information e mail ngs cors@ noaa gov U S Coast Guard Navigation Center www navcen uscg gov This site offers GPS constellation status scheduled outage updates user advisories and almanac data as well as Differential GPS and Coast Guard Local Notice to Mariners information Voice recording for GPS constellation status 703 313 5907 For more information Contact the NIS Watchstander 24 hours a day at phone 703 313 5900 fax 703 313 5920 or e mail tis pf nisws@ uscg mil See more at gpsworld com the almanac 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 Stephen Mitchell phone 202 762 1455 or DSN 762 1455 e mail stephen mitchell@ usno navy mil International International GNSS Service IGS www igs org The foundation of IGS is a global network of more than 400 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 applies geoscience to Australias most important challenges by providing geoscience information services and capability to the Australian Government industry and stakeholders Geoscience Australia is the national focal point for coordination of geodetic information and data and maintains a national network of observatories which forms part of a global observatory network Users can download data from GNSS continuously operating reference station sites along with their coordinates Geoscience Australia also provide a number of geodetic calculation tools a geoid model to convert between ellipsoidal heights and the Australian Height Datum AUSGeoid and an online GPS processing service AUSPOS which allows users to upload dual frequency RINEX data and receive computed positions rapidly by e mail For more information Contact Geoscience Australia phone 61 2 6249 9111 fax 61 2 6249 9929 email geodesy@ ga gov au Czech Republic http radio feld cvut cz RSRDC doku php id almanacs 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@ fel cvut cz Denmark www gst dk Danish Geodata Agency provides GNSS raw carrier phase data by request This services are based on the permanent reference station network operated by the Danish Geodata Agency GST For more information Contact Casper Jepsen Danish Geodata Agency Rentemestervej 8 DK 2400 Copenhagen NV Denmark phone 45 72 54 50 00 e mail gst@ gst dk Russia www glonass iac ru The Information and Analysis Center for Positioning Navigation and Timing IAC PNT 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 PNT Center Central Research Institute for Machine Building Federal State Unitary Enterprise email ianc@ glonass iac ru www gpsworld com August 2015 GPS World 49
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