GPS Augmentation Services in Japan for the 8th IISC Europe at Prague December 2 - 3, 1999
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Transcript of GPS Augmentation Services in Japan for the 8th IISC Europe at Prague December 2 - 3, 1999
GPS Augmentation Services in Japan
for the 8th IISC Europe at PragueDecember 2 - 3, 1999
by IISC CPoC in Japan
Hiroshi Nishiguchi
Japan GPS Council
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
Status of the Car Navigation Markets
2005 2003 2000 1999 1998 1997 1996 1995 1994 19931,000sets 2600 2200 1800 1500 1300 1050 850 550 330 140
Ratio ofprevious 118.2 122.2 120.0 115.4 123.8 123.5 154.5 166.7 235.7
<DGPS><485> <240> - - -
Actual shipment results
Source : JGPSC
•FM-DGPS service has been provided since May,1997.•EIAJ figure + non EIAJ
GNSS Performance• Accuracy
– Difference between measured position and true position
• Integrity– The ability of system to provide timely warnings to users when the syst
em should not be used for navigation
• Continuity– The capability to perform its function without non-scheduled interruptio
ns during the intended operation
• Availability– The portion of time during which the system is to be used for navigati
on
• Space reference– World Geodetic Systems, 1984 (WGS-84)
– APL(Airport Pseudolite)
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)
System Architecture
Ibaraki MCSIbaraki MCS
Sapporo GMSSapporo GMS
Fukuoka GMS
Naha GMSNaha GMS
UserUser
Australia MRSAustralia MRS
Hawaii MRSHawaii MRS
Kobe MCSKobe MCS
Tokyo Tokyo GMSGMS
GPS ConstellationGPS ConstellationMTSATMTSAT
MCS Master Control StationMCS Master Control Station
MRS Monitor and Ranging StationMRS Monitor and Ranging Station
GMS Ground Monitor StationGMS Ground Monitor Station
KDD 128KbsKDD 128Kbs
NTT 64KbsNTT 64Kbs
SBAS Service Providers
• WAAS (USA)– phase 1 operation in 1999
• CWAAS (Canada)
• EGNOS (Europe)– planned for 1999
• MSAS (Japan)– phase 1 operation in 2001
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 SB
AS Service Providers
Configuration of GBAS
– Ground Segment Architecture • GNSS Receivers
• Data Processor
• NABS Transmitter
• Monitor
• Pseudolite (Option)
GPS
GLONASSMTSAT
GNSS, SBAS &GBAS Receivers
GBAS Monitorstation
PseudoliteGNSSReceivers
GNSS
Data Processor
SBAS
GBAS NABS Transmitter