GNSS DGPSSBAS MSAS SBAS/MSAS MSAS LEX
GPS 4 7.5 26,561km 121158 2 55 L1=1,575.42MHz (10.23MHz154) L2=1,227.6MHz (10.23MHz120) C/A Code (1.023MHz : 1023 chips)l1 P(Y) codel1l2 3 GPS P(Y) P(Y) C/A M P(Y) C/ACS) CS) P(Y) M C/A M C/ACS) CS) M C/A P(Y) P(Y) 1176 MHz (L5) 1227 MHz (L2) 1575 MHz (L1) GPS III 2013 L1C 4
GPS Block Block Block Block Block M II R-M II F2009/2010F 2009/2010 5 GPS Block IIA/IIR GPS (16-24m ) (L1) (C/A) (16m ) Y-Code (L1Y & L2Y) Y-Code Block IIR-M, IIF IIR-M: IIA/IIR 2 (L2C) M-Code (L1M & L2M) Eliminates SA for denial IIF: IIR-M 3 (L5) Block III Block IIIA: 4 (L1C) 6
GPS Ambiguity L2L5 7 GNSS GPS L2C L2C GLONASS GalileoIOC IOC QZSS QZSS CNSS 8
DLL Punctual Early Late DLL Punctual Early Late -1/2 +1/2 ()
Potential Errors Receiver noise Multipath Tropospheric delay Ionospheric delay Ephemeris error Clock error MSAS PSP Global
SBAS DGPS// ARTEMIS 2MTSAT GAGAN 13 MSAS (MTSAT Satellite-based Augmentation System) / PRN / PRN MTSAT=Multi-functional Transport Satellite ( -A 14
MTSAT (MSAS) Cover Area 15 1/3
2/3 3/3
SBAS Data Type Type 26 (IGP : Ionospheric Grid Point) MSAS
2007/06/162007/07/28 MSASDGPS : JLR-E MSASDGPS RTK (NovAtel OEMV)
u-blox EVK-5H MSAS OFF RANGE OFF 1.9 m MSAS 1.0 m MSAS OFF RANGE OFF 2.5 m MSAS 2.4 m GPS MSAS OFF RANGE OFF MSAS MSAS u-blox EVK-5H =48.6 =50 RPN4 65
I Range: off Range: on II Range: off Range: on
12 +MSAS 11 10 9 GPS 8 7 1 Hour 2 Hours MSAS MSAS MSAS MSASDOP
GPS GPSDGPSRTK-GPS FloatFix RTK-GPS DGPSRTK-GPS DGPSL1,L2 DGPSm 86cm L119cm
RTK-GPS (cm) 10 8 6 4 2 0-2 -4-6 -8 4000SSE RTCM : 8 47 FIX: 93.6 2drms=1.43 cm -10-10 - 8-6 - 4-2 0 2 4 6 8 10 (cm) (cm) 10 8 6 4 2 0-2 -4-6 -8 4000SSE RTCM : 8 44 FIX: 96.7 2drms=1.57 cm -10-10 - 8-6 - 4-2 0 2 4 6 8 10 (cm) RTK-GPS2 (m) (cm) 10 8 6 4 2 0-2 -4-6 -8 : 7 48 FIX: 100.0 2drms=1.11 cm -10-10 - 8-6 - 4-2 0 2 4 6 8 10 (m) (cm) (cm) 10 8 6 4 2 0-2 -4-6 -8-10 - 10-8 - 6-4 - 2 0 2 4 6 8 10 10 : 7 45 FIX: 97.0 2drms= 4.45 cm (cm)
1200 25km VRS
GNSS Lower L-Band Upper L-Band C-Band ARNS RNSS RNSS* RNSS* ARNS RNSS ARNS RNSS Galileo E5/A GPS L5 Galileo E5/B Galileo E3 GPS L2 Glonass G2 Galileo E6 GPS L1 Glonass G2 Galileo C1 960MHz 1151MHz 1164MHz 1188MHz 1214MHz 1215MHz 1237MHz 1239MHz 1254MHz 1258MHz 1260MHz 1261MHz 1300MHz Galileo E4 1559MHz 1563MHz 1587MHz 1591MHz 1593MHz 1610MHz 5010MHz 5030MHz 5250MHz Galileo E2 Galileo E1 RNSS* shared with other services Galileo E5/A or E5/B frequency band options LEX(QZSS) 1278.75MHz BPSK(5) 39 (1) 12ID+IOD 30 SV 3
(2) (55km) - (L1) L2, L5 L1 30 (110km) (ZWD) + 30 () 0.50.6 0.6 (55km) : 280
(3) UPD (Uncalibrated Phase Delay) L1, L2, L5 (Phase Wind-up up) OTF, PPP-AR AR DCB (Differential Code Bias) L1C/A, L2C, L5 LC (L1P-L2P) L2P)
GDOP PDOP HDOP VDOP TDOP 5 1.831 1.716 1.159 1.265 0.640 120 15 2.141 1.964 1.195 1.558 0.854 30 3.073 2.667 1.333 2.309 1.528 45 5.284 4.267 1.633 3.942 3.117 60 11.831 8.923 2.309 8.619 7.769 70 26.692 19.442 3.376 19.147 18.288 80 107.086 76.296 6.650 76.006 75.142 85 428.729 303.73 13.24 303.44 302.580 GPS QZS MSAS QZSLEX LEXKbps) Kbps) RTK-GPS GPS