Title: GPS ? ??? ? ???
1GPS ???? ? ???
- The 60th Nandemo Seminar
- 2007/04/20
- ?? ??
2????
- ????
- ?? ??
- http//www.kmonos.net/
- ??
- ???????
- ???????????????????
- ?????
- ?????????????????????????
- XML????????????????????
3GPS??
4GPS ??
- Global Positioning System
- ????????????????
- ?????????
??????????? ???????? ??????????
5GPS?????
- ?????????
- ????
- ???????
- 110 / 119 ????????
- ????
- GPS???(??)???????
6?????? - GPS??????
- 2????
- (??,??) ??????
- 3????????
- (??,??,??)
- 4????????
- (??,??,??,????)
7GPS?????
???????????? ???????!!
8GPS????
9??????
- ? ?????????????????
- d ???????????????
- ?-d ????
10?????? - GPS???
- ? ?????????????????
- d ???????????????
- ?-d ????
11?? ????????????
- ??????????3?(??)???
- A (Ax, Ay, Az) ???? dA
- B (Bx, By, Bz) ???? dB
- C (Cx, Cy, Cz) ???? dC
- ???????
- dA2 (x-Ax)2(y-Ay)2(z-Az)2
- dB2 (x-Bx)2(y-By)2(z-Bz)2
- dC2 (x-Cx)2(y-Cy)2(z-Cz)2
- ??!
- 3?????2????
12???????
- GPS??????????
- GPS???????????
- GPS???
13GPS???????? (1)
- ????GPS??????? ?????????????????
- ?? ??????????
- ?????????
14GPS???????? (2)
???? 5?0?0.0001??! ????? 299792458m/s ???
15GPS???????? (3)
- ?????????????????????
- ????? s ????4??????
- (dA-cs)2 (x-Ax)2(y-Ay)2(z-Az)2
- (dB-cs)2 (x-Bx)2(y-By)2(z-Bz)2
- (dC-cs)2 (x-Cx)2(y-Cy)2(z-Cz)2
- ??????!
?????????????????????????
16GPS???????? (4)
?5?0?0.001? ?????????
17GPS???????? (5)
- ???????
- ??????????????????????????
- s???????????t???????ts????????????
- ????d ??k (k???) ????????????!!
18GPS???????? (6)
- ???????
- ??????????????????????????????
- 110GHz / ?? 330cm ???????
- ????d 30cmk (k???) ????????????!!
19GPS???????? (7)
- ??????? ?????????
- ??????????????????
- sin(?t a) 1.5GHz ???????
- p(t) 1MHz ???? 1, -1 ?
???????? - p(t)sin(?ta)
20GPS???????? (8)
- ?????
- ?????
- ?????????????????????????p(t)???????
21GPS???????? (9)
- p(t) ?PN???????
- 1MHz ??? 1,-1 ????????????????
- ????????????????
- 1023?????
- 1MHz 30Km 1023????? ? 30000Km
???????????!
22GPS???????? (10)
- p(t) ?PN???????
- 1MHz ??? 1,-1 ????????????????
- ????????????????
- 1023?????
- ????????PN???????????????????????????????
- CDMA (Code Division Multiple Access)
23???????
- GPS??????????
- GPS???????????
- GPS???
24GPS??????? (1)
- ?1
- ???? p(t) PN???????????? ?PN??? ?
???????????????????????????????
???????????????????????????????
25GPS??????? (2)
- ?2
- ???? p(t) PN???????????? ?PN??? ?
?????????????????????????????????????????????????
???
??????????????
?????GPS?????????
26GPS??????? (3)
- ?3
- ??? p(t) PN???????????????????????????????????!!
??????????????!
????????? GPS?????????? D(t) p(t)
sin(?ta) 50bps ??????????????
27???????
- 1500???
- ?????????????????????
- ??????????etc
- ???????????????????
- ??????
- ????????
- ????????????
- ???(8bit) ?? ?????????????1999?? 8bit
????????????? - ????
28???????
- GPS??????????
- GPS???????????
- GPS???
29GPS???
- ?????? 5m ??? ???????
- ??????????
30????? (1)
- ??????
- ??????
- ??????????????????
- ?????????
- ????
- ????
31????? (2)
- ?????
- ?????????
- ??????????????????????????
- ?GPS????????????
- ?????
- GPS?????(?????)????????????????????
32????? (3)
- ????? (SA Selective Availability)
- ??????????????GPS????????????????????
- 2000?5?????????
- ? DGPS
33GPS???
34GPS??????????????
- GPS?????????
- ???????????????(????????) ???????
- ??????????
35GPS??????? (1)
36GPS??????? (2)
- google//GPS????
- \10,000
- PSP?GPS????????????
- ???????GPS???????????
- ???????GPS??????????
37NMEA - GPS???????
GPGGA,011738,3540.4949,N,13945.2633,E,1,03,06.9,0
0000.0,M,039.3,M,,47 GPGSA,A,2,13,17,23,,,,,,,,,
,07.0,06.9,00.907 GPGSV,2,1,06,02,28,301,00,04,6
4,339,00,05,04,309,00,23,39,059,3274 ...
38????????
39GPS??????? (3)
40GPS??????? (4)
- ?????????
- 2007?4????????????? ? ??????????????????
- ????
- ????
- ??????????
- ???????????????
- ???????????????????
41???? from ????
- ?????URL????????????
- au
- lta hrefdevicegpsone?urlURLgtlt/agt
- DoCoMo (FOMA)
- lta hrefURL lcsgtlt/agt
- SoftBank
- lta hreflocationauto?URLgtlt/agt
- ?????????CGI?????
- ??http//www.yaskey.cside.tv/mapserver/note/gps.h
tml (GPS?? ???? ????)
42??(?)
43????