Civil GPS Service Interface Committee
International Information Subcommittee
The International Information Subcommittee (IISC) of the Civil GPS Service Interface Committee (CGSIC) convened in Edinburgh, Scotland, on December 6-7, 1993.
The original meeting minutes are below.
CIVIL GPS SERVICE INTERFACE COMMITTEE ( CGSIC ) INTERNATIONAL INFORMATION SUB-COMMITTEE ( IISC ) RECORD OF THE FIFTEENTH MEETING 6TH/7TH DECEMBER 1993 - EDINBURGH 1. Meeting agenda at Annex A, attendee list at Annex B, action list located Annex C and Bibliography ex UKCSG Teach-in meeting Annex D. Meeting commenced with representatives introducing themselves to each other. 2. Opening Addresses and Chairpersons Review Walter Blanchard, the RIN President and UKCSG Chairman opened the meeting and thanked delegates for their attendance, especially the representatives from Australia and Japan. Captain James Taylor, Chief Executive of Northern Lighthouse Board delivered the opening address and warmly welcomed attendees. He recognised the increasing importance of Satellite Navigation and the necessity for comprehensive resources to facilitate GPS introduction. Although Northern Lighthouse Board were hosting the meeting, Captain Taylor stressed the impartiality of the UK Department of Transport in respect of GPS. 3. Chairperson's Review George Preiss acknowledged the attendance of representatives from Australia, Germany, Italy, Norway, Poland, United Kingdom and the United States. Absent delegates from Denmark, Finland, Netherlands and Sweden had forwarded their best wishes for a successful meeting. He reviewed IISC activity following the two previous European meetings, Honefoss 1990 and London November 1991. Since then, four CGSIC meetings had been held with simultaneous IISC meetings. At the last Interface Committee meeting, the revised IISC charter was submitted to the CGSIC Co - Chairman for adoption. Significantly, the Edinburgh meeting coincided with European and American Satellite Navigation policy developments . In particular, the anticipated GPS Initial Operating Capability Declaration and release of the Joint DOD/DOT Task Force report. He concluded by thanking the outgoing IISC Vice - Chairperson Mike Jensen for his major contribution to the Subcommittee. (Subsequently, the meeting appointed George Weber from IFAG Frankfurt as the new Vice - Chairperson.) 4. Civil GPS Service and GPSIC Status Update Viewfoil copies are available on request. The complete USCG maritime DGPS service will become operational by 1996. A demonstration of the first DGPS Control Station is scheduled for March 1994. PPS applications for valid reasons must be directly submitted to the US Department of Defence and for non US countries routed through their own Defence Departments. At the last CGSIC meeting, attendees reported that complete GPS outages had occurred at the following locations Venice, Brindisi, Cartagena, Pearl Harbour, Panama City and North Australian coastal waters. In response, the USCG have requested that any circumstances preventing GPS reception, in particular multipath or interference, are reported to the Commanding Officer GPSIC by either Letter ( USCG Omega Navigation System Center, 7323 Telegraph Road, Alexandria, VA 22310 - 3998 ), Fax ( 0101 703 313 5900 ), or Telephone ( 0101 703 313 5900 ), Email on the GPS Bulletin Board ( 0101 703 313 5910 ) or X.25 ( 0311 0350 1132 800 ). 5. GPS Status Update Viewfoil copies are available on request. Bill Fauver stated the continuing problems with PRN19 affecting the PPS signal and perhaps DGPS systems. The C1 constellation slot remained open and launch for this slot would not be earlier than 3.3.1994. Also satellites 36, 37, 38 and 39 would be launched on demand and be referenced by flight numbers instead of PRN/SV numbers. The declarations of Initial Operating Capability ( IOC ) and Full Operating Capability ( FOC ) remain outstanding. However Air Force Space Command had advised the Secretary of State for Defence that IOC could be declared. ( Subsequently IOC was declared 8.12.1993 ). FOC will be declared after the 24th Block II/IIA satellite is operational and system testing is complete. Laser reflectors are fitted on two Block II satellites and the provision of a combat service location capability modelled on COSPAR/SARSAT is under consideration. Currently, GPS Control Segment software is being upgraded and RAIM is required for DOD user equipment. Several enhancements are planned for the Block IIF satellites subject to weight considerations including a Wide Area DGPS capability. The first Block IIF launch is planned for 2004 and Position, Velocity and Timing levels remain at existing levels until then. For Inmarsat, the PRN codes will be different to US DOD ICD 200 specification types and GIC will be based on PRN code developed by Inmarsat. A draft ICD is available from RTCA to describe the alternative signal format. 6. GPS Cost benefits Viewfoil copies are available on request. Walter Blanchard expertly delivered this paper on behalf of Hans van der Wal. The paper identified the potential macro economic benefits and detailed interesting and challenging concepts. Whether the overall benefits of GPS introduction result in increased employment, additional value added services and improved productivity remains to be determined. 7. Point of Contact, Legal and Agreement Issues The POC list requires to be updated and volunteers are needed to do this. The meeting decided to set up a working group to discuss and respond to the impending Task Force report. 8. US DOT/DOD Task Force and Federal Radionavigation Plan Viewfoil copies are available on request. Tom Gunther delivered this presentation in the absence of Heywood Shirer. Tom emphasized the ongoing work with the Task Force report and therefore his inability to describe its content, recommendations or conclusions. However, he did describe the Terms of Reference and GPS issues concerning the Task Force. 9. Civil GNSS Office Development Walter Blanchard reported on events since the Paris October 93 meeting which charged IAIN with the establishment of a GNSS office. ( See CGSIC 22nd meeting record ). Eleven Institutes of Navigation had provided written support for office creation. The joint ICAO/IMO group needed ICAO to establish a panel of Satellite Navigation experts before proceeding further with its establishment. The GNSS Office is expected to require a staff of 10 to 15 people and need annual budget of 2.5 million US dollars. 10. Inmarsat Update Viewfoil copies are available on request. George Kinal gave an excellent presentation on the Inmarsat Navigation Programme. He addressed the topics of Geostationary Overlay, the options to provide Differential Corrections including WADGS and Future GNSS options. George also identified the difficult Institutional, Legal and Political Issues related to the above topics which will need to be resolved in the future. 11. Global Integrity Monitoring Viewfoil copies are available on request. Borje Forssell delivered a first class presentation, which was probably the highlight of the meeting. He identified the requirements of a Satellite Navigation System and described the various techniques to implement GPS Integrity Monitoring, particularly for aviation. He concluded by noting the key points requiring attention to provide Integrity Monitoring and outlining the European GNSS Transition Strategy Plan of Eurocontrol. 12. Glonass Dr Peter Daly described Glonass status and mentioned the anticipated launch of three more satellites by 1st January 1994. Glonass had recently changed from 24 to 12 frequency transmissions with the earth shielding satellites transmitting on the same frequency. A P code standard is apparently under test and Leeds University have a 20 channel combined Glonass/GPS receiver under development, with existing 10 channel GNSS receiver aboard CAA trials BAC111 aircraft. Peter recognised that the European Space Agency and Eurocontrol are changing their approach to SatNav and will probably consider supplementing GPS with their own satellites. Difficulties still remain with obtaining Glonass information directly from Russia and the USCG are perhaps also trying to obtain direct data from the system provider. ( See Annex F, also the IFAG GIBS Computer Bulletin Board does provide Glonass almanacs in Yuma format ). 13. SATREF ( Norwegian National DGPS Service ) Viewfoil copies are available on request. George Preiss explained the current SATREF status, including DGPS transmissions via public broadcasting stations and the anticipated use of a satellite link to Svalbard reference station. 14. Geodetic Aspects, IGS and Datums Viewfoil copies are available on request. Terry gave an interesting presentation about the IGS structure and its objectives to obtain a Global Terrestrial Reference Frame and determine Earth Rotation Parameters, effect Geodynamic Studies and calculate the precise orbits of GPS and other satellites. 15. Norwegian Radionavigation Policy Viewfoil copies are available on request. Inger-Lise Sogstad updated the meeting on progress to develop the proposed Norwegian Radionavigation Plan. She referred to the Terms of Reference, the Working Group Proposal and Recommendation, Steering Committee deliberations and the current status of NRP development. Inger-Lise hoped the first NRP would be published early in 1994, after receipt of a report from the recently formed DGPS working group. 16. AUSLIG Projects John Manning referred to the early users and applications of GPS i.e. Land Surveyors, Resource Management and Offshore Survey and explained their Bulletin Board arrangements ( See CGSIC 22nd Meeting Record ). Todays major potential user disciplines are for aviation, marine and recreational purposes. Much datum work has taken place concerning the Australian National Spheroid, WGS 84 and the new geocentric date related datums i.e. ITRF 91 and ITRF 92.6. AUSLIG have established a network of reference stations and are introducing a national GPS Integrity Monitor System. ( See CGSIC 22nd Meeting Record ) 17. US GPS Industry Council Michael Swiek described the wide, varied and persuasive roles of USGIC, especially their major achievement to influence the changes US GPS export controls. USGIC found it essential to cooperate and communicate with the US government, they had briefed and arranged equipment demonstrations for congressional representatives. Although the US government funds GPS, it listens to industry views and the USGIC is effectively in partnership with government to promote GPS. Other USGIC functions concerned education either directly through seminars or GPS guide creation or perhaps indirectly through press releases. Mike emphasized that the GPS story is still being created and USGIC are associated with six other reports separate to the DOD/DOT Task Force deliberations. In conclusion, he asked if the creation of a European Industry Group would be beneficial. 18. Japan GPS Council Hiroshi Nishiguichi gave this presentation in English. The current status of JGPSC is contained in the Summary Record of the 22nd CGSIC meeting. 19. Closing Address Luc Tygat began by describing the background to the Transport policy adopted by the European Union particularly related to navigation. He explained the reason for intervention with Loran C development which required coordination between member states. The European Commission are consulting expects to compile a European Radionavigation Plan. The ERP will probably cover three time phases, early nineties until 2000, from 2000 to probably 2010, and then future requirements. This approach is in line with EC policies and the ERP will receive constant review. The EC provides technical support for industry e.g. the financing of Glonass receiver development. They are to keen to establish a European GNSS complement to GPS/Glonass and European workshop to be held on this topic 9.12.1993. A tripartite Task Force of European Space Agency, Eurocontrol and the European Commission will formulate and propose GNSS solutions. The initial proposal will probably include GPS/Glonass/Inmarsat 3 and the Task force will suggest solutions for future generations. By 1995 a Research and Development programme will be established to support a European framework for navigation by satellite. Luc felt that IISC was important, it catalyses issues and serves to liaise in matters concerning national/international interests with the USA. 20. Summary of National Reports Polish viewfoil located Annex E. George commented on the maturity of GPS and the now well established information services in many European countries particularly Denmark, Germany, Netherlands, Norway, Sweden and the United Kingdom. Perhaps the next steps will be to enlarge these Bulletin Boards to cover other radionavigational systems, further address self funding issues, and implement truly active distribution from the United States. ANNEX A AGENDA - EUROPEAN MEETING - 6TH/7TH DECEMBER 1993 - EDINBURGH MONDAY - 6 DECEMBER 1993 1400 UKCSG Welcome Address Walter Blanchard, President, RIN 1405 Opening Address Capt James Taylor, Chief Executive of the Northern Lighthouse Board 1415 Chairperson's Review George Preiss, Norway 1430 Civil GPS Service and GPSIC Cdr Tom Gunther, USCG Status Update 1500 GPS Status Update Major Bill Fauver, AFSPACECOM 1525 Refreshments and Bulletin Board demonstrations 1600 GPS Cost Benefits Hans van der Wal, Netherlands Ministry of Transport 1615 Point of Contact, Legal and Mike Jensen, IISC Vice Agreement Issues Chairperson 1625 National Reports (Information Services etc) All 1700 Open discussion All 1730 Close 1900 Reception hosted by Northern Lighthouse Board T U E S D A Y - 7 D E C E M B E R 1 9 9 3 0900 US DOT/DOD Task Force and Cdr Tom Gunther or Heywood Shirer Federal Radionavigation Plan US Department of Transportation 0930 Civil GNSS Office Development Walter Blanchard, President, RIN 0945 National Reports continued All 1030 Refreshments and Bulletin Board demonstrations 1100 Eurocontrol and GNSS TBA 1120 Inmarsat Update George Kinal, Inmarsat 1140 Global Integrity Monitoring Dr B Forssell, University of Trondheim 1200 Glonass Dr P Daly, Leeds University 1215 Open Discussion 1230 Lunch and Bulletin Board demonstrations 1400 SATREF George Preiss, Norway ( Norwegian National DGPS Service ) 1415 Geodetic Aspects, IGS and Dr Terry Moore, IEESG Datums Nottingham University 1430 Norwegian Radionavigation Inger-Lise Sogstad, Royal Policy Norwegian Ministry of Fisheries 1445 AUSLIG Projects John Manning, Australia 1500 Refreshments and Bulletin Board demonstrations 1530 US GPS Industry Council Michael Sweick, USA 1545 Japan GPS Council Hiroshi Nishiguichi, Japan 1600 Summary of National Reports George Preiss, IISC Chairman 1615 Closing Address Luc Tytgat, European Commission 1645 Open discussion 1715 Close ANNEX B LIST OF DELEGATES Neil Ackroyd Trimble Navigation Hook, Hampshire Gordon R Baron Institute of Offshore Engineering Heriot-Watt University Edinburgh Mr W Blanchard Consultant Dorking, Surrey Mr Tom Boa Northern Lighthouse Board Edinburgh Bruce Butler Trimble Navigation Hook, Hampshire Carlo Carmebienc PELESIBO Rome Italy Dr Peter Daly Director Institute of Satellite Navigation Leeds University Peter Douglas Northern Lighthouse Board Edinburgh Mr T J Ernst ITT Fort Wayne USA Major Bill Fauver AFSPACECOM Petersen AFB Colorado Springs USA Dr Borje Forssell Norwegian Institute of Technology University of Trondheim Norway Captain M Gibbon FORSTAD Aberdeen Commander Tom Gunther USCG Alexandria USA Miss M Haga Interpreter London Ken Henderson The Scottish Office Edinburgh Robert G Horton Hydrographic Office Taunton, Somerset Mike Jensen ( IISC Vice - Chairperson ) Shell International Petroleum The Hague Netherlands George Kinal Inmarsat London Mr Ron Kinnear Northern Lighthouse Board Edinburgh John Manning AUSLIG Belconnen Australia Mr J Mitchell GEC Marconi Avionics Ltd Edinburgh Dr Terry Moore Institute of Engineering, Space Science and Geodesy Nottingham University Hiroshi Nishiguichi Japan GPS Council Tokyo Graham Norris GEC Marconi Avionics Ltd Edinburgh Dennis O'Connell WIMPOL Ltd Aberdeen Ian Padgham FUGRO-UDI Ltd Aberdeen Captain W Parkinson Petersen AFB Colorado Springs USA Mr Bill Paterson Engineer in Chief Northern Lighthouse Board Edinburgh George Preiss ( IISC Chairperson ) Statens Kartverk Honefoss Norway David Roberts WIMPOL Ltd Aberdeen Mike Savill ( IISC Secretary ) Northern Lighthouse Board Edinburgh Inger-Lise Sogstad Ministry of Fisheries Oslo Norway Michael Swiek United States GPS Industry Council Washington USA Captain James Taylor Chief Executive Northern Lighthouse Board Edinburgh Moira F Tighe Shell Expro London Luc Tytgat Directorate-general for Transport European Commission Brussels Belgium Dr Nick Ward Trinity House Lighthouse Cowes Dr George Weber Institut fuer Augewandte Geodaesie Frankfurt Germany Dr J. B. Zielinski Polish Academy of Sciences Space Research Centre Warsaw Poland ANNEX C ACTION LIST Note: Action items are grouped in accordance with the objectives given in the current IISC Charter, together with a final group "Housekeeping" concerning the management of the Sub-Committee's affairs. Action Item INFORMATION NEEDS I. Report any integrity monitoring developments and activity. (See also Annex R to the report of the IISC meeting in Norway 11/90.) II. Report any DGPS Integrity Monitoring developments and activity COMMUNICATIONS NEEDS III. Information Package development: Distribute questionnaire to other known information service centres IV. Monitor GPSIC developments. GENERAL INFORMATION EXCHANGE V. Check validity of POC list HOUSEKEEPING VI. Track formal Issues with CGSIC Chairmen VII. Maintain document archive. VIII. Determine Interface to new Reference Station Subcommittee IX. Compile IISC List of achievements for next CGSIC meeting Action by To be included in national reports To be included in national reports Chairman Standing All Standing Chairman Standing Chairman/ Secretary Chairman/ Secretary Chairman/ Secretary ANNEX D GPS BIBLIOGRAPHY Global Positioning System, Theory and Practice Hofmann-Wellenhof et al, Springer-Verlag, 1992 Global Navigation, A GPS User's Guide Neil Ackroyd and Robert Lorimar, Lloyd's of London, 1990 GPS: A Guide to the Next Utility Trimble Navigation Ltd, 1988 GPS Satellite Surveying Alfred Leick, John Wiley & Sons, 1990 Guide to GPS Positioning David Wells et al, Canadian GPS Associates, 1986 GPS: A Field Guidebook to Static Surveying Trimble Navigation Ltd, 1991 GPS: A Field Guidebook to Dynamic Surveying Trimble Navigation Ltd, 1992 RTCM Recommended Standards for Differential Navstar GPS Service RTCM, 1990 Basic Geodesy Jim Smith, Landmark Enterprises, 1988 Satellite Geodesy Gunter Seeber, Walter de Gruyter, 1993 GPS World European Office, Unit 4E, Bridgegate Pavilion, Chester Business Park, Wrexham Road, Chester, CH4 9QH, United Kingdom SPN Journal of Satellite-Based Positioning, Navigation and Communication Herbert Wichman Verlag, Karlsruhe Department of Defense World Geodetic System 1984 Technical Report and Supplements, DMA TR - 8350.2, 1987