SBAS???????????

1
??????? ???? SBAS???????????
??19?7?19? ?????? ? ??????? ?? ??
2
??????

• GPS/SBAS???
• GPS???SBAS??????
• SBAS???
• MSAS??????
• ?SBAS???
• MSAS?????
• ????????????????????

3
GPS??
4
GPS???

• GPS??
• ??????????????2?km?????????????????
• 1???????2????
• 2007?7?15????29?????????????????21???????24??
• ???610??????????
• GPS?????
• ?????????????????
• ?????????????????????????????
• ?????????????????????????????????

5
GPS?????

• ?GPS?????????????(????)?????????
• ????????????????????
• ???????????? ? ?????????
• GPS?????????????
• ???????????????????????????????????
• ?????????????????????????????????????
• 4???????????????
• GPS????? IS-GPS-200D??

6
GPS???????

• ???????????
• ????????????????????(?m??)?
• ?????????(?m??)
• ??????????
• ????????????
• ????????????????????????
• 100m???
• ??????????????????????????
• 25m???
• ????????????????????????10m???

7
SBAS??
8
??????

• GPS????????????????????
• ???????????????????????????????????????????(Augmen
  tation System)?
• ?????(GPS????????????????????????????????????????)
  ????
• GPS???????????????????????
• ICAO(????????)???GNSS??
• ??????????????????????GNSS(Global Navigation
  Satellite System)?????????
• SBAS??????????????????????????????????????
• GBAS??????VHF???????????????????????????
• ABAS?????????????

9
GPS????????

• 2004?1?2?(JST)????PRN23??????
• 3?????????PRN23????????????????
• ????????????????????????????

10
GPS?????
Charlie Bellows, GPS Constellation Status, 46th
CGSIC, Sept. 2006
????? (deg)
????? ??????????????
?????
?????????GPS????????? ?????????????
11
SBAS???????
12
MSAS???????
13
SBAS????(1)
SBAS

• ? GPS??????????????
• ????????????GPS??(???????)????????
• ?????????????????????????(GPS????????????????????
  ?????)?????????
• ????(GEO) ????????????

????(GEO)
????

• ? ?????????????
• GPS?????SBAS???????????????????????
• SBAS?????????????????????????(??)????????????????
  ???????
• ??????? ????? (????????????????????)
• ???????????????????????(??)?????????????????SBAS?
  ??????????

14
SBAS????(2)
SBAS
? ????,??? ? ????,???????? - ?????????? ?
???????? - ??(???5??????)???? ?????????????
?????
???
????
???
????
????(GEO)
????
GPS??
GPS??
????
????? (???????)
??
????
?????
15
?????

• ?????????????
• 95?(95????)????????
• ??????95??????????????
• ???5???????????(????
• ?????????????)?
• ???????5???
• ?????????????(???????)
• ????????
• 99.99999????(???5?10-7 )???????????????99.99999
  ??????????????(?????????????????)?
• ??????????????????????????????????????????????????
  ?????????????
• ???????????????????????????(95???????????????5??
  ???????)?

16
???????????
?? ????? lt ???? ????SBAS?????
?????? ?????? NPA (LNAV/VNAV) APV-I (LPV) APV-II (LPV200) CAT-I
???? m ?? ?? 556m - 556m 50m 40m 50m 40m 20m 40m 35m 40m 1012m
(?????FAA????)
??????????
DH 350ft
200ft
3/4nm
1nm
17
SBAS???????

• IS-GPS-200DNavstar GPS Space Segment/Navigation
  User Interfaces, GPS Joint Program Office, March
  2006
• GPS??????????????
• SARPs International Standards and Recommended
  Practices, Aeronautical Telecommunications, Annex
  10 to the Convention on International Civil
  Aviation, vol. I, Nov. 2002
• ICAO???GNSS????????
• GPS?SBAS/GBAS???????????????????
• DO-229DMinimum Operational Performance Standards
  for Global Positioning System/Wide Area
  Augmentation System Airborne Equipment, RTCA,
  Dec. 2006
• WAAS???????????
• Appendix A????WAAS?????????????????

18
SBAS???
19
MSAS?????????
_at_ ?? (940058) 05/11/1416 PRN129
_at_ ?? (940058) 05/11/1416 PRN129
GPS
GPS
MSAS
MSAS
???? 95?? 2.78m (GPS) 1.00m (MSAS)
???? 95?? 7.26m (GPS) 1.46m (MSAS)
20
???????????
MSAS Broadcast 06/10/17 0000-2400 PRN129
(MTSAT-1R) Test Signal Contour plot for Average
VPL
21
??????????(APV-I???)
MSAS Broadcast 06/10/17 0000-2400 PRN129
(MTSAT-1R) Test Signal Contour plot for APV-I
Availability HAL 40m VAL 50m
APV-I???? ?????????()
?NPA??????(100)????
22
??????????
GEONET 93011 Tokyo 06/10/17 0000-2400 PRN 129
(MTSAT-1R) Test Signal APV-I mode HAL 40m
VAL 50m All-in-view Receivers
23
????SBAS??
MSAS
WAAS
EGNOS
??????100(??????)
??????????SBAS?????NPA???????????????
24
?SBAS???
MSAS(??) 2007?9???NPA??????? WAAS(??)
NPA???APV-I(???? 350ft)????(????)
2007??????200ft????????? ????????????????(??
????) ?????????????????????
MCS?????????????? EGNOS(??) NPA???APV-I(????
350ft)?????? GAGAN(???) ????????????(?????8???
???? ??1?????????1?,GEO??1?) 2010???????????
????
25
WAAS?LPV200??
? ?????LPV(HAL/VAL40m/50m)?????????????VAL35m??H
AT(Height Above Touchdown)200ft?????????????????
- ?????????????9m (99????2m) - ILS?Collision
Risk Model(CRM) ???MLS????????????????????????????
ILS????200ft HAT?????????????? ? ICAO
NSP?WP?????(??FAA) ? ???????LPV200???????
26
MSAS?????
27
MSAS?????????

• NPA???????????????????
• ???????
• SBAS????????????95??2m??????
• ????99.99999?????????(?????)?????????????????????
  ??????
• ?????????????????????????????????????????
• ???????????????
• ?????????????????????
• ?????????????????????GIVE(Grid Ionospheric
  Vertical Error)??????????
• MSAS????????????????????????????GIVE???????????

28
????????????

• ???????????
• ??250400km????????????????????????????????
• ???????????????????????????????????????????????
  ?????????
• ???????????????????????
• ??????????????(????2?????)?
• ????????
• GPS?????ns300ns??????????????????m100m???????
• ????????????????????????????2????
• MSAS??????????????????????????1m???????

29
SBAS????????

• ???????
• ????5??????(IGPIonospheric Grid Point)?
• IGP??????????(???????)??????
• ??????????????????????????GIVE(Grid Ionospheric
  Vertical Error)?????????
• ??????????
• ????? ? ??????????
• GIVE? ? ????????
• ???????????????????(NPA??????)?
• MSAS???
• ?????????????????????????????
• ?????????????????????GIVE?(??????)??????????? ?
  ????????????

30
???????
31
?????????
32
IGP???
???????(SBAS??)
?????IGP??
33
?????????????

• ?????????????
• ????????????GIVE?(????????????????????)??????
• (1)FOC WAAS??????
• ??WAAS?2008????????????????????
• ????????????????????????
• ????LPV200???????????????
• ?????????????????????
• (2)?????????????(???????)
• ???????????????MSAS????????????
• ????LPV200????????????
• ?????????????????????????????????

34
????????
?????
????????
?????????????
????
???????????????????1/3???????? ??????? ? ?????????
35
FOC WAAS??????
APV-I???????????????
4???????? (??????????)
????????(??6?)
4?????????????????????(????????100)????
36
?????????????
APV-I???????????????
4???????? (??????????)
????????(??6?)
?????????????????(????????100)????
37
????

• Galileo????
• ????????????????30??????????????
• ???????Galileo?????????SBAS?????????????????????
  12??????????????
• ???????Galileo?????????????????????
• 2??SBAS
• L5?????????????GPS????IIF???2008?????????????
• 2014???18???2018??????????L5???????(??????????????
  ???)?
• ??FAA??20082015??WAAS?2???????????
• 2?????????????????????????????LPV200CAT-I????????
  ?

38
???

• ???????????
• ICAO GNSS????SBAS/GBAS/ABAS?????????
• ????????????????GPSRAIM(ABAS)????????????
• MSAS(ICAO SBAS)????
• ???????????????????????
• ??WAAS?????????EGNOS?2008????????????????
• ????MSAS????9???NPA??????????
• MSAS?????
• ??????????????
• ???FOC WAAS???????????????????
• ?????????????????????????????