????????GPS/WAAS???

1
????????GPS/WAAS???
??????? ?? ??
2
Introduction

• ??????????????
• GPS?GLONASS?Galileo
• GPS?????
• ??????(ICAO SBAS/GBAS)
• WAAS???
• ??????WIPP???(??7?10?)
• ????????
• WAAS?????
• ??????(???????2??????)
• WAAS????????

3
Navstar/GPS

• 24??(6???????2?km)
• ???28??????
• ?????55????1158
• ????????(SPS)????
• L1(1575.42MHz)C/A???(1.023Mcps)
• ????????(PPS)??
• L2(1227.6MHz)P/Y???(10.23Mcps)
• ????????CDMA???
• ???PRN??(137)?????
• ???????(50bps)????
• 1978 Block I ??????
• 1989 Block II/IIA ???(SA????)
• 1997 Block IIR ???????Autonav

4
GPS?????????

• MCS 1???????MCS ??????????????
• Monitor Station(MS) 6?(??1??MCS?)
  L1/L2????????????
• Ground Antenna(GA) 4? ??????????

5
?????(Modernization)

• SA??(2000?5?)
• Block IIR-M(2004)???????(L21227.6MHz)
• ???ARNS????????????????
• ?????????
• IOC 2008?FOC 2010
• Block IIF(2006)???????(L51176.45MHz)
• Safety-of-Life Application?OK(??????)
• ???DME(9601215MHz)??????
• IOC 2012?FOC 2014
• Block III(2010?)????GPS
• MS??NIMA????(6?)
• MCS??Alternate MCS(??????)

6
GLONASS(???)

• 24??(3??????19100km)
• ???10?????????3?
• ?????65????1115
• L1(15921610MHz)SP???(0.511MHz)
• L2(12391254MHz)HP???(5.11MHz)
• FDMA?????????
• SA???????
• GLONASS-M ???SP????L2???????7?
• GLONASS-K 3?????10????2005?
• GLONASS-NG 2010?
• ???L3?(11641215MHz?)??????

7
Galileo(EU)

• 1999??EU????????????????
• 30??(3??????23600km)
• ???????????
• OS(Open Service) GPS SPS??????
• CS(Commercial Service) ?????????????
• SoL(Safety-of-Life Service) ??????
• PRS(Public Regulated Service) ??????
• E1(1589.5MHz)E2(1561MHz) OS/CS/SoL/PRS
• E6(12601300MHz) CS/PRS
• E5a(1176MHz)E5b(1201.5MHz) OS/SoL/CS(E5b)
• 2005??????2006 IOC?2008 FOC

8
??????

• ??????????????????????????????????????????????????
  ?(augmentation system)???????????
• ?????????????????
• ???????
• (1) ?????????????????
• (2) ???????????????
• (3) ????????????????????????
• ?????????GPS???????????
• ?????????GPS???????????
• ?????????????FM??????

9
????????
10
????(??)
11
????(??)
12
????(??)
13
???????????

• ICAO(????????)
• 1944??????????????????????
• ??????????????????????????
• FANS??????????(1991)
• ???????????????????????????
• GNSS???????(1993)?4?(2003/4)
• ???NSP(Navigation System Panel)????????
• GNSS??????????????????????????????????(SARPs)????
  ?
• (1) ??????(GPS/GLONASS)???
• (2) ??????(SBAS/GBAS/ABAS)?????

14
ICAO GNSS
SBAS Satellite-Based Augmentation System
??????????????? GBAS Ground-Based Augmentation
System ???????????????? ABAS Airborne-Based
Augmentation System ?????????????
15
SBAS???
16
????SBAS
17
MSAS???
18
FAA WAAS

• ?????(FAA)???SBAS
• 1991?????????????WADGPS?????
• ???1997??????????????
• ??????(NSTB)
• WAAS????????????
• 199394??NSTB??????????
• ????????????????(1996)
• ?????????????(1999)
• WIPP(WAAS Integrity Performance Panel)??(2000)
• ????????????????(2000/8)
• ??????(2003/7/10)
• ???????OK?LPV????????????????
• 3 GEO???Phase-I FOC?2007?????

19
WAAS???
20
WAAS????

• ????????????1????????

21
WAAS???
22
WAAS(SBAS)???

• WAAS(SBAS)???????
• L1???(1575.42MHz)?BPSK?C/A???(1.023MHz)
• PRN120138GPS?????PRN??????
• ??????250bps(???????500spsFEC?????)
• 1?????/?
• ??????????
• (1) ?????????(??????????)
• (2) ???????(???????)
• (3) ??????(???????)
• ??????
• ????2?(INMARSAT AOR/W, POR)
• ??MCS 2??Monitor Station 25??Uplink Station 3?

23
WAAS?????(1)
24
WAAS?????(2)
25
IGP???

• ?????????2??
• ?????(????)
• GIVE(??????)
• ????????IGP????????????
• ???????????????????IPP?????????????????????(?????)
  ?

26
WAAS???????
MESSAGE TYPE 01 sec265410.127 PRN134 PRN MASK
001 002 003 004 005 006 007 008 009 010 011 012
013 014 015 017 018 019 020 021 022 023 024 025
026 027 028 029 030 031 122 134 MESSAGE TYPE 00
sec265411.128 PRN134 DO NOT USE MESSAGE TYPE
03 sec265418.127 PRN134 FAST CORRECTIONS MT3
00 mask 13 (PRN014) FC 255.875m UDRE Not
Monitored 01 mask 14 (PRN015) FC -0.500m
UDRE 0.8315m2 02 mask 15 (PRN017) FC
-0.125m UDRE 0.4678m2 03 mask 16 (PRN018)
FC -0.625m UDRE 0.8315m2 04 mask 17
(PRN019) FC 255.875m UDRE Not Monitored 05
mask 18 (PRN020) FC 255.875m UDRE Not Monitored
06 mask 19 (PRN021) FC 1.250m UDRE
2.5465m2 07 mask 20 (PRN022) FC 0.000m
UDRE 0.8315m2 08 mask 21 (PRN023) FC
-0.125m UDRE 0.4678m2 09 mask 22 (PRN024)
FC -0.500m UDRE 0.8315m2 10 mask 23
(PRN025) FC 255.875m UDRE Not Monitored 11
mask 24 (PRN026) FC 0.000m UDRE 0.4678m2
12 mask 25 (PRN027) FC -0.375m UDRE Not
Monitored MESSAGE TYPE 24 sec265419.127 PRN134
MIXED FAST/LONG CORR 00 mask 26 (PRN028) FC
255.875m UDRE Not Monitored 01 mask 27
(PRN029) FC 255.875m UDRE Not Monitored 02
mask 28 (PRN030) FC -0.250m UDRE 2.5465m2
03 mask 29 (PRN031) FC 255.875m UDRE Not
Monitored 04 mask 30 (PRN122) FC -3.625m
UDRE 230.9661m2 05 mask 31 (PRN134) FC
-13.250m UDRE Do Not Use mask 10 (PRN011)
dx 3.625m dy 5.625m
dz -3.750m da_f0 -12.573ns
ddx -0.488mm/s ddy 0.488mm/s
ddz -0.977mm/s da_f1 0.000ns
toa 6240s
MESSAGE TYPE 18 sec265421.128 PRN134 IGP
MASKS IGP bands 3 IGP band ID
2 018 019 020 021 022 023 024 025 043 044
045 046 047 048 049 050 068 069 070 071 072 073
074 075 093 094 095 096 097 098 099 100 101 118
119 120 121 122 123 124 125 126 MESSAGE TYPE
26 sec266115.128 PRN134 IONO CORRECTIONS IGP
band ID 1 IGP block ID 2
grid 00 Delay 7.875m GIVE 20.787m2 grid
01 Delay 7.250m GIVE 1.8709m2 grid 02
Delay 6.750m GIVE 1.1974m2 grid 03 Delay
6.500m GIVE 1.8709m2 grid 04 Delay
6.500m GIVE 1.8709m2 grid 05 Delay
6.375m GIVE 1.8709m2 grid 06 Delay
6.000m GIVE 3.3260m2 grid 07 Delay
10.000m GIVE 20.787m2 grid 08 Delay
9.000m GIVE 20.787m2 grid 09 Delay
8.000m GIVE 1.8709m2 grid 10 Delay
7.000m GIVE 1.8709m2 grid 11 Delay
6.500m GIVE 1.1974m2 grid 12 Delay
6.125m GIVE 1.1974m2 grid 13 Delay
6.000m GIVE 1.8709m2 grid 14 Delay
6.000m GIVE 1.8709m2 MESSAGE TYPE 00
sec266117.128 PRN134 DO NOT USE MESSAGE TYPE
03 sec266118.127 PRN134 FAST CORRECTIONS MT3
00 mask 13 (PRN014) FC 255.875m UDRE Not
Monitored 01 mask 14 (PRN015) FC -0.375m
UDRE 0.8315m2 02 mask 15 (PRN017) FC
-0.125m UDRE 0.4678m2 03 mask 16 (PRN018)
FC -0.500m UDRE 0.8315m2 04 mask 17
(PRN019) FC 255.875m UDRE Not Monitored 05
mask 18 (PRN020) FC 255.875m UDRE Not Monitored
06 mask 19 (PRN021) FC 1.125m UDRE
1.8709m2 07 mask 20 (PRN022) FC 0.125m
UDRE 0.8315m2 08 mask 21 (PRN023) FC
0.250m UDRE 0.4678m2
27
WAAS????????

• ??????????(Protection Level)??
• 1107??????????????????
• ????HPL?????VPL
• PL?????(Alert Limit)?
• ????ALltPL??????
• PL?????????
• SARPs???
• ????????????
• ????????????
• ?????(UDRE, GIVE)
• VAL50m(LNAV/VNAV, LPV)
• /20m(APV)/12m(CAT-I)

28
??????????

• ??????????????????????????????????????????????????
  ?
• ?????????????????????
• ???????????????????
• ?????

29
WAAS????(1)
30
WAAS????(2)
31
WAAS??????
32
??????

• Phase-I WAAS FOC(2007?)
• ??????????????????(25??34?)
• GEO??
• 2?????(Phase-II WAAS)
• GPS L5????SBAS???(L2?????)
• ???RTCA?L5 SBAS ICD????
• ????????????????????
• ???????250bps????500bps
• ????SBAS????
• ??????????????????
• ?????????????????

33
???????

• ?????2???????????(??????)

34
?????????
35
Conclusion

• GPS???Block IIR????????
• Block IIR-M(2004)???????
• Block IIF(2006) ???????
• ?????????????MCS????
• WAAS????????????????????????7??FAA????????(IOC)?
• ???????????????????
• ?????(LPV)???????
• ??????????????Phase-I WAAS FOC????