1. GPS Augmentation Services in Japan for the 8th IISC Europe at Prague December 2 - 3, 1999 by IISC CPoC in Japan Hiroshi Nishiguchi Japan GPS Council

2. Current Augmentation Systems in Japan MSAS : MTSAT Satellite-based Augmentation System (under Construction by JCAB) Beacon DGPS : Maritime Safety Agency (FOC : April, 99 with 27 Ref. St. ) FM-DGPS : Nation-wide Service by Gpex and Japan FM Network using FM sub-carrier without direct charge (FOC : May, 97 with 7 Ref. St.) RTK-OTH : Marine Constructions, off-shore Remote Constructions, in-land

3. Status of the Car Navigation Markets Actual shipment results Source : JGPSC FM-DGPS service has been provided since May,1997. EIAJ figure + non EIAJ

4. GNSS Performance Accuracy –Difference between measured position and true position Integrity –The ability of system to provide timely warnings to users when the system should not be used for navigation Continuity –The capability to perform its function without non- scheduled interruptions during the intended operation Availability –The portion of time during which the system is to be used for navigation Space reference –World Geodetic Systems, 1984 (WGS-84) –APL(Airport Pseudolite)

5. Ground Components Master Control Stations (MCS) CPF Central Processing Facility NES Navigation Earth Station M&C Monitor & Control Ground Monitor Stations (GMS) Monitoring & Ranging Stations (MRS) Network Communication System (NCS)

6. System Architecture Ibaraki MCS Sapporo GMS Fukuoka GMS Naha GMS User Australia MRS Hawaii MRS Kobe MCS TokyoGMS GPS Constellation MTSAT MCS Master Control Station MRS Monitor and Ranging Station GMS Ground Monitor Station KDD 128Kbs NTT 64Kbs

7. SBAS Service Providers WAAS (USA) –phase 1 operation in 1999 CWAAS (Canada) EGNOS (Europe) –planned for 1999 MSAS (Japan) –phase 1 operation in 2001

8. Interoperability among SBASs Receiver/Signal in Space –All SBASs to refer RTCA Do-229 MOPS Network –Information exchange between SBASs On-going Discussion in IWG –Interoperability Working Group among SBAS Service Providers

9. Configuration of GBAS – Ground Segment Architecture GNSS Receivers Data Processor NABS Transmitter Monitor Pseudolite (Option)