GPS World, December 2014
ONLINE RESOURCES NEWSLETTER EXCERPT Professors and Books That Make a Difference I consider it to be one of the three PNT bibles that are a must have in every PNT subjectmatter experts library The other two are Global Positioning System Theory and Applications Volumes 1 and 2 by Bradford W Parkinson and James J Spilker and Understanding GPS Principles and Applications Second Edition by Elliott Kaplan and Christopher Hegarty Read the full column at gpsworld com editorials Hottest Pages @ GPSWorld com October 14 November 13 2014 1 Qualcomm to Acquire SiRF Chipmaker CSR LATEST NEWS 2 Massively Online GPS Course Massively Popular LATEST NEWS 3 Red Cross Recruits Volunteers to Map Ebola Outbreak Regions LATEST NEWS 4 The Almanac FROM THE MAGAZINE 5 Galileo A Constellation of One GNSS Design Test newsletter INSIGHTS 6 RTK GNSS Receivers A Flooded Market Survey Scene newsletter INSIGHTS 7 GPS IIF 8 Launched Successfully from Cape Canaveral LATEST NEWS 8 Misplaced Galileo Satellite Moving to New Orbit LATEST NEWS 9 Eighth GPS IIF Set to Launch Wednesday LATEST NEWS 10 Galileo Team Raced to Respond Following FOC Launch LATEST NEWS This year the prestigious ION Kepler Award was won by Dr Pratap Misra of Tufts University Though I am happy to say that many of my friends and colleagues have won this coveted award honestly in my opinion there has never been a more deserving award winner than Professor Pratap Misra I have had the good fortune to know Pratap Misra for many years and frankly By Don Jewell erroneously assumed along with many others that since he is so obviously deserving he had previously won the Kepler The Kepler Award is presented annually by ION in recognition of an individuals unparalleled sustained and significant contributions to the development of satellite navigation It is the highest honor bestowed by IONs Satellite Division Dr Misra meets and exceeds all of these qualifiers and more He is simply self effacing and polite as he quietly goes about being the best in all he endeavors Throughout the years I have found Pratap to be extremely dedicated to his work and more recently to his students These are key attributes Academically I can honestly say that the authoritative tome Global Positioning System Signals Measurements and Performance that he coauthored with another friend and colleague Per Enge of Stanford University is among the most dog eared in my PNT library WEB PAGE DOWNLOAD The GPS World Almanac Orbit Data and Resources on Active GNSS Satellites GLONASS Constellation GLONASS NUMBER KOSMOS NUMBER LAUNCHED USABLE 95 712 2413 12 26 04 8 1 A 100 714 2419 12 25 05 17 3 B 101 715 2424 12 25 06 4 3 07 14 7 2 102 716 2425 12 25 06 10 12 07 15 0 2 103 717 2426 12 25 06 4 3 07 10 7 2 105 719 2432 10 26 07 11 27 07 20 2 3 106 720 2433 10 26 07 11 25 07 19 3 3 107 721 2434 12 25 07 2 8 08 13 2 2 108 722 2435 12 25 07 14 2 C 109 723 2436 12 25 07 1 22 08 11 0 2 110 724 2442 9 25 08 10 26 08 18 3 D 111 725 2443 9 25 08 11 5 08 21 4 3 116 730 2456 12 14 09 1 30 10 1 1 1 117 733 2457 12 14 09 1 24 10 6 4 1 118 734 2458 12 14 09 1 10 10 5 1 1 119 731 2459 3 1 10 3 28 10 22 3 3 120 732 2460 3 1 10 3 28 10 23 3 3 121 735 2461 3 1 10 3 28 10 24 2 3 122 736 2464 9 2 10 10 4 10 9 2 2 123 737 2465 9 2 10 10 12 10 12 1 2 124 738 2466 9 2 10 10 11 10 16 1 2 125 701 2471 2 26 11 20 5 3 E 126 742 2474 10 2 11 10 25 11 4 6 1 127 743 2475 11 4 11 3 5 13 8 6 1 128 744 2476 11 4 11 12 8 11 3 5 1 129 745 2477 11 4 11 12 23 11 7 5 1 130 746 2478 11 28 11 12 23 11 17 4 3 131 747 2485 4 26 13 7 4 13 2 4 1 132 754 2491 3 24 14 4 13 14 18 3 3 F 133 755 2500 6 14 14 21 3 G Galileo Constellation BeiDou formerly Compass Constellation SATELLITE NORAD ID PRN LAUNCHED ORBIT NOTES BeiDou M1 31115 C30 4 13 07 MEO period 1289 hours A BeiDou G2 34779 N A 4 14 09 GEO drifting B BeiDou G1 36287 C01 1 16 10 THE GEO ALMANAC 140 E C BeiDou G3 36590 C03 6 2 10 GEO 1105 E D BeiDou IGSO1 36828 C06 7 31 10 IGSO 118 E 550 incl BeiDou G4 37210 C04 10 31 10 GEO 1600 E BeiDou IGSO2 37256 C07 12 17 10 IGSO 118 E 550 incl BeiDou IGSO3 37384 C08 4 9 11 IGSO 118 E 550 incl BeiDou IGSO4 37763 C09 7 26 11 IGSO 95 E 550 incl BeiDou IGSO5 37948 C10 12 1 11 IGSO 95 E 550 incl BeiDou G5 38091 C05 2 24 12 GEO 5875 E BeiDou M3 38250 C11 4 29 12 MEO period 1289 hours E BeiDou M4 38251 C12 4 29 12 MEO period 1289 hours E BeiDou M5 38774 C13 9 18 12 MEO period 1289 hours E BeiDou M6 38775 C14 9 18 12 MEO period 1289 hours E BeiDou G6 38953 C02 10 25 12 GEO 80 E 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 World Wide Web page 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 centerof 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 also 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 THE ALMANAC 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 is available 24 hours a day from a free online subscription service CSRS Online Database For more information Contact the Geodetic Integrated Services unit 615 Booth Street Ottawa Ontario Canada K1A 0E9 phone 613 995 4410 fax 613 995 3215 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 2 s Ge d a e p n Re e s at a C a e Ar h c i ba n X n r pa n c m c G S t g h w v e O m ro ro Notes IGSO node longitudes are nominal values Nodes are allowed to drift 3 degrees or so A Inactive B Initially achieved geostationary orbit at a longitude of about 845 E but appears to have become uncontrollable shortly thereafter Librating about the 75 E libration point C GEO formerly at 1445 E shifted to 140 E between about June 30 and July 9 2011 D GEO formerly at 84 E shifted to 1105 E between about November 7 and November 23 2012 E The MEO satellites are in a 24 satellite three orbit plane Walker constellation with orbit planes spaced by 120 The first four MEO satellites occupy slots 7and 8 in plane 1 and slots 3 and 4 in plane 2 BeiDou System Information China fielded a demonstration regional satellite based navigation system known as BeiDou Chinese for the Big Dipper asterism and pronounced bay dough following a program of research and development that began in 1980 The initial constellation of three geostationary Earth orbit GEO satellites was completed in 2003 A fourth GEO satellite was launched in 2007 The initial regional BeiDou system BeiDou 1 has been replaced by a global system known as BeiDou 2 or simply BeiDou and formerly Compass It will eventually include five GEO satellites 27 medium Earth orbit MEO satellites and five inclined geosynchronous orbit IGSO satellites BeiDou 2 was declared operational for use in China and surrounding areas on December 27 2011 FOC for this area was declared on December 27 2012 The system will provide global coverage by 2020 or even as early as 2017 according to some reports For more information Official BeiDou website English language version http en beidou gov cn enables users to determine centimeter level positions with respect to m e 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 u o BEIDOU SATELLITES M3 and M4 were launched April 29 2012 Photo ChinaNews com calibrates GPS antenna phase center values establishes guidelines for operating and using active geodetic control networks ntervalues ngandusingactivegeodeticcontrol 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 See more at gpsworld com the almanac 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 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 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 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 http glonass iac 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 ianc@ glonass iac ru t asconsultation andscientifi f c methodservicestoincrease GLONASSapplicationseff f i f ciency Itprovidescurrentconstellations mapsofthecurrentanddailynavigationavailabilities resultsofGNSS navigationfi f eldmonitoringintheMoscowareainareal timemode h d F i f i IAC Mi i C lC il ALMANAC SLOT CHANNEL ORBIT PLANE NOTES EUROPES FIRST TWO Galileo Full Operational Capability FOC satellites in the clean room in Kourou French Guiana before launch SATELLITE NORAD ID LAUNCHED OPERATIONAL SLOT PRN CLOCK NOTES GIOVE A 28922 12 28 05 A GIOVE B 32781 4 27 08 B PFM GSAT0101 37846 10 21 11 12 10 11 B5 E11 H C G FM2 GSAT0102 37847 10 21 11 1 16 12 B6 E12 H D G FM3 GSAT0103 38857 10 12 12 12 1 12 C4 E19 H E G FM4 GSAT0104 38858 10 12 12 12 12 12 C5 E20 Rb F G A Navigation signals from GIOVE A were switched off on June 30 2012 and the satellite decommissioned for ESA use B Navigation signals from GIOVE B were switched off on July 23 2012 and the satellite decommissioned for ESA use C Nicknamed Thijs D Nicknamed Natalia Notes E Nicknamed David F Nicknamed Sif Unavailable since May 27 2014 until further notice due to power anomaly G System is undergoing in orbit validation campaign Occasional planned outages of satellite signals Satellites are currently transmitting valid navigation messages Galileo System Information Galileo Satellite is a joint initiative Based of the European Augmentation Commission EC ec europa eu and Systems the European Space Agency ESA www esa int Initially they formed the Galileo Joint Undertaking GJU to manage Galileos development phase The European GNSS Supervisory Authority GSA www gsa europa eu initially headquartered in Brussels Belgium took over Galileo SBAS responsibility from SATELLITE GJU on January 1 2007 ORBIT The headquarters LONGITUDE were moved PRN to NO Prague NOTES in the Czech Republic on September EGNOS 1 2012 The Inmarsat GSAs tasks 3 include F2 AOR management E of 155 the first W series of satellites 120 to ensure the A large scale demonstration of the capabilities Artemis and reliability of the Galileo system 215 E The first two Galileo 124 satellites secured B the systems frequency allocation and validate Inmarsat key technologies 4 F2 for the full Galileo 25 E constellation Surrey 126 Satellite Technology C Ltd SSTL www sstl co uk in Guildford SES United 5 Kingdom constructed 5 the E first test satellite 136 Formerly known D as the Galileo System Test GAGAN Bed GSTB V2 A satellite GSAT it has 8 been christened Galileo 55 E In Orbit Validation 127 Element A E GIOVE G A and was launched on December 28 2005 GSAT The second 10 test satellite GSTB 83 V2 B E or GIOVE B constructed 128 by a team F G led by Astrium GmbH now MSAS Airbus Defence and MTSAT Space www 1R space airbusds com 140 in Ottobrunn E near Munich 129 Germany H was launched on April 26 2008 The first two in MTSAT orbit validation 2 IOV satellites 145 were E launched on October 137 21 2011 H and the third and fourth IOV QZSS satellites were launched QZS on October 1 12 2012 all 135 provided E by Astrium Three 183 IOV satellites I are currently transmitting SDCM test signals The satellites Luch were 5A provided by Astrium 167 Transmission E of valid 140 navigation messages J began on January 17 2013 The first two full operational capability satellites are scheduled for launch on August 21 2014 Luch 5B 16 W 125 K Luch 5V 95 E 141 L WAAS Intelsat Galaxy 15 CRW 133 W 135 M O TeleSat Anik F1R CRE 1073 W 138 N O Inmarsat 4 F3 AMR 98 W 133 P IRNSS Constellation ALMANAC THE Orbit Data and Resources on Active GNSS Satellites GPS Constellation SV PRN CLOCK LAUNCHED USABLE PLANE SLOT NOTES General Notes 1 The first GLONASS satellite was launched October 12 1982 23 32 Rb 11 26 90 2 26 08 E5 26 26 Rb 7 7 92 7 23 92 F2 F 39 09 6 26 93 A 34 04 Rb 10 26 93 11 22 93 D4 36 06 3 10 94 B 33 03 Cs 3 28 96 4 9 96 C5 40 10 Cs 7 16 96 8 15 96 E6 38 08 Cs 11 6 97 12 18 97 A3 2 The GLONASS numbering scheme used N a s t s e i o s s S w a s S a c in this table includes the eight dummy satellites orbited as ballast along with real satellites on the first seven GLONASS launches The second number in parentheses in the GLONASS Number column is that assigned by the Russian Space Forces 43 13 Rb 7 23 97 1 31 98 F3 46 11 Rb 10 7 99 1 3 00 D2 F 51 20 Rb 5 11 00 6 1 00 E1 44 28 Rb 7 16 00 8 17 00 B3 41 14 Rb 11 10 00 12 10 00 F1 54 18 Rb 1 30 01 2 15 01 E4 56 16 Rb 1 29 03 2 18 03 B1 A 45 21 Rb 3 31 03 4 12 03 D3 47 22 Rb 12 21 03 12 1 04 E2 3 The Russian Federation designated the Kosmos Number 4 GLONASS numbers 1 94 have been withdrawn from service 5 All operational satellites are GLONASS M satellites except GLONASS 125 which is a GLONASS K1 satellite GLONASS 132 includes an L3 transmitter 6 All launch and usable dates are based on Moscow Time Universal Time 3 hours 7 Almanac c slot numbers in parentheses TYPE Block IIA TYPE Block IIR SV PRN CLOCK LAUNCHED USABLE PLANE SLOT NOTES TYPE Block IIR 59 19 Rb 3 20 04 4 5 04 C3 60 23 Rb 6 23 04 7 9 04 F4 61 02 Rb 11 6 04 11 22 04 D1 TYPE Block IIR M 53 17 Rb 9 26 05 12 16 05 C4 52 31 Rb 9 25 06 10 12 06 A2 58 12 Rb 11 17 06 12 13 06 B4 55 15 Rb 10 17 07 10 31 07 F2 A 57 29 Rb 12 20 07 1 2 08 C1 48 07 Rb 3 15 08 3 24 08 A4 50 05 Rb 8 17 09 8 27 09 E3 TYPE Block IIF 62 25 Rb 5 28 10 8 27 10 B2 63 01 Rb 7 16 11 10 14 11 D2 A 65 24 Cs 10 4 12 11 14 12 A1 66 27 Rb 5 15 13 6 21 13 C2 64 30 Rb 2 21 14 5 30 14 A6 67 06 Rb 5 17 14 6 10 14 D6 General Notes Performance Note 1 SV Number refers to space vehicle number indicate the physical orbital slot of reserve test satellites e or those in maintenance and not in the h almanac PRN Number refers to the satellites unique pseudorandom noise code 2 Clock Rb rubidium Cs cesium 3 Launched and Usable dates are based on 8 Channel number k indicates L1 and L2 carrier frequencies L1 1602 Universal 05625 Time k MHz L2 1246 04375 k MHz 4 The current active GPS constellation consists Performance Notes r L of 6 Block IIA satellites 12 Block IIRs 7 Block IIR Ms and 6 Block IIFs for a total of 31 satellites and is under FOC Full Operational Capability The constellation is in the 24 3 or Expandable 24 configuration with satellites occupying the fore and aft bifuracted slots in the B D and F planes There are currently five reserve satellites SVNs 27 32 35 36 and 37 and one test satellite 49 near slots A1 F2 F B1 F C2 C1 and B1 F respectively SVN27 transmitted signals as PRN30 between December 3 and 17 2013 SVN49 transmitted signals as PRN30 between December 19 2013 and February 10 2014 and as PRN06 between April 3 and May 5 2014 These satellites were set unhealthy and not included in broadcast almanacs A GLONASS S 95 is a reserve satellite B GLONASS S 100 was operational and set healthy between February 24 and April 11 2014 4 using frequency channel 6 It subsequently u resumed its status as a reserve satellite C Maintenance tests of GLONASS 108 were n e n S 4 concluded on July 22 2014 and the satellite has been removed from the constellation D GLONASS 110 was set unusable on February 12 2014 It is currently under maintenance 6 SVN35 and 36 carry onboard corner cube reflectors for satellite laser ranging SLR SLR tracking of the satellites permitted analysts to differentiate between onboard clock errors and satellite ephemeris errors in GPS tracking 7 Selective availability SA was set to zero on all satellites by presidential order on May 2 2000 at approximately 4 00 UT Previous Almanacs provide a history of SA status 8 Antispoofing AS was activated on January 31 1994 on all Block IIs AS is occasionally off for testing and other purposes Previous Almanacs provide a history of AS status 9 The design life and mean mission duration goals of the Block IIA IIR and IIF satellites are 75 and 6 years 10 and 75 years and 12 and 99 years respectively 10 GPS World believes this information to be correct as of press time However because of the satellite constellations evolving nature readers should contact GPS information services listed on these pages for more current data GLONASS N Satellite System Information Information ti Analytical Center IAC Russian Space Agency www glonass s ianc rsa ru 5 The Block IIF 1 2 3 4 5 and 6 satellites The IAC publishes b official information have nicknames about GLONASS Polaris status Sirius and Arcturus plans as well Vega as consultation information n and scientific method Canopus services and to Rigel increase respectively GLONASS applications efficiency It provides current constellations s Earth maps of the current and daily navigation availabilities results of GNSS navigation field f monitoring in the Moscow area in a real time mode and other data For more information o IAC Mission Control Center email glonass ianc@ mcc rsa ru 11 Dr Richard Langley of the University of New Brunswick provided the GPS satellite status information and compiled the notes GLONASS M 755 was launched from the Plesetsk Cosmodrome June 14 Notes 9 All GLONASS satellites use cesium atomic clocks 10 Twenty four GLONASS satellites are currently set healthy 11 The latest GLONASS launches were for GLONASS 132 and 133 which were launched from the Plesetsk Cosmodrome on March 24 and June 14 2014 respectively 132 was set operational on April 13 2014 133 is still undergoing checkout and is not yet operational A GLONASS K1 single satellite launch from Plesetsk and a GLONASS M triple satellite launch from Baikonur are expected later this year and early next year respectively 12 New GLONASS channel allocations were introduced September 1993 to reduce interference to radio astronomy Note the use of the same channel on pairs of antipodal satellites 13 GPS World believes this information to be correct as of press time However because of the satellite constellations evolving nature we encourage readers to contact the GLONASS sources listed on these pages for more current information 14 Information compiled by Richard Langley tests E GLONASS 125 is currently in flight test mode and is near physical orbital slot 20 When not in the active constellation the satellite typically identifies itself as satellite 26 in its broadcast ephemeris F GLONASS 132 has a Kosmos number of 2491 assigned by the Russian Federation but NORAD is using a designation of 2494 G GLONASS 133 is undergoing commissioning and is not yet operational S A Inmarsat 3 F2 began Safety of f Life Service on March 2 2011 and is transmitting message type 2 B Decomissioned for EGNOS use S Satellite sold to Britains Avanti Communications C Inmarsat 4 F2 began Safety of f Life Service on March 22 2012 and is transmitting message type 2 D SES 5 also known as Sirius 5 and n Astra 4B was launched on July 9 2012 Satellite occasionally transmits test signals E GSAT 8 was launched on May 20 2 2011 F GSAT 10 was launched on September e 28 2012 G GAGAN was certified for enroute t navigation and non precision approaches on December 30 2013 H MSAS commissioned for aviation o use on September 27 2007 Either satellite can transmit both PRN signals if necessary I QZS 1 nicknamed Michibiki transmits r an L1 augmentation signal using PRN code 183 That signal is in test mode Central Longitude can vary by 5 or more from nomimal value J Luch 5A was launched on December e 11 2011 Initially positioned at 585 E it was shifted to 95 E between about May 30 THE SIXTH GPS BLOCK IIF satellite was launched May 16 and June 28 2012 then shifted to 167 E between about November 30 and December 22 2012 Transmissions as PRN 140 began on July 12 2012 Transmitted occasional non coherent code carrier test signals n g ember l route K Luch 5B was launched on November 2 2012 and started transmitting test signals on January 17 2013 L Luch 5V was launched on April 28 2014 Testing may have started using PRN 140 not 141 M Galaxy 15 ranging supports enroute through precision approach modes Switched to backup satellite oscillator on January 6 2012 N Anik F1R ranging supports enroute through precision approach modes O The Galaxy 15 and and Anik F1R payloads operated by Lockhhed Martin for the FAA are known as LMPRS 1 and LMPRS 2 respectively oute modes P Inmarsat 4 F3 supports non precision approach ranging service According to the Indian Space Research Organisation the Indian Regional Navigation Satellite System IRNSS will consist of three GEO satellites located at 34 E 83 E and 1315 E as well as two pairs of IGSO satellites with their nodes at longitudes of 55 E and 1115 E with an orbital inclination of 29 The first satellite in the planned constellation IRNSS 1A was launched fromthe from the Satish Dhawan Space Centre on July 1 2013 at 18 11 UTC The satellite with international designation 2013 034A and NORAD JSpOC identification number 39199 achieved its assigned IGSO on July 18 2013 with a nominal nodal longitude of 55 E and an orbital inclination of 27 27 Test transmissions started shortly thereaft thereafter f er The second IGSO satellite satellite IRNSS IRNSS 1B 1B was launched on April 4 4 2014 2014 at 11 44 UTC Designated as 2014 017A and 39635 it was placed in an orbit with a nominal nodal longitude of 55 E and an inclination of 31 For more information ISRO website http www isro org satellites navigationsatellites aspx THE ALMANAC A SVN39 PRN09 was set unusable and removed from the GPS constellation on May 19 19 2014 2014 It continued to transmit L band signals until May 27 2014 It was then reactivated but still set unusable on June 13 2014 for a rubidium clock checkout ntinued nusable VN36 B SVN36 PRN06 was set unusable and removed from the GPS constellation on February 21 2014 It is now a reserve satellite located near slot C2 GPS Satellite Satellite System SystemInformation Information See e GNSS Internet Resources on page 49 for contact information on these agencies GPS S gov The h U S government provides the GPS gov website to educate the public about the Global bal Positioning System and related topics Information includes sections for the general e eral public for Congress for international citizens for professionals and for students dents The site is maintained by the National Coordination Ofce for Space Based Positioning o tioning Navigation and Timing in coordination with multiple federal agencies National tional Executive Committee for Space Based Positioning Navigation avigation Timing www ww gps gov governance excom The he EXCOM advises senior national government leadership and coordinates with federal agencies gencies about policy matters concerning GPS its augmentations and related systems The he National Space Based PNT Advisory Board operates in an independent advisory capacity acity for the EXCOM as directed by the National PNT Policy and in accordance with the Federal Advisory Committee Act DoD GPS Operations Center and 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 The GPS Operations Center provides DOP predictions performance assessments anomaly impact analysis FAQs and other services for GPS users in the feld 2SOPS operates a GPS Constellation Status site with scheduled outages user advisories almanac data electronic mail and downloadable fles U S Coast Guard Navigation Center Navigation Information Service NIS www navcen uscg gov This site ofers GPS constellation status scheduled outage updates user advisories and almanac data as well as Diferential GPS and Coast Guard Local Notice to Mariners information Access two ways Web page with links Download the PDF Available at gpsworld com the almanac GPS World December 2014 www gpsworld com 4
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