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fIZR*9è212

11000
2000
IPP Distance, km2%& :f3&*'(*c+Ù4*:#$`ZR J(),-Planar Fitting

68.3%
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68.3%
95.5%99.7%03

 1. éùRúû­üý #$`íÙ}

3

Estimated Sigma, mIPP

3000

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Rmax [km] RMS [m]/0 [m]AP9¨©ª«S¬­

1200

0.514

7.26

1.28

0.9262 (0.9262)

1500
2100

0.528
0.541

3.95
5.25

1.28
1.390.9831 (0.9833)
0.9992 (0.9994)

1200

0.670

14.5

2.23

0.8334 (0.8546)

1500
2100

0.736
0.806

12.0
15.8

2.65
2.86

0.9072 (0.9411)
0.9447 (0.9909)

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IPP qH IGP ¡%1)¥'¥J IPP qH IGP ¡%1éùRúû­üý9æ¼%ÉYJoJ()ZdH4(nê û­üý¼Äf9a %&)fI¨©ª«S¬­9ÆÇgI :)wYZR 9& YH,)íÙÞßdË(íÙ¸6ÊËg[:YVh)

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4Î

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ö(éùRúû­üýYqH)y IGPèu4*a% RMS #

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*c9£¤¥JzË¥¦§%J 9);æ
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d9 38.4 f¯-. û­üý)¤Ä%YpI,éùRúû­üý| RMS #/Ff I,)f9%É :fùü

M² !ÙÞß¼'*)New<7Ä HI*:/0J()¤ÄY-.d90ÉJ9­%& qHéùRúû­üý9æ¼gI(o)û­üý ÆÇYgI(JYJ:tý:«ÈÒ%)ZR *c'(û­üý9æ¼gI(o)ï9Ö

 7.  û­üý|4*-.tý:«:d9 38.4 f¯-. û­üý)¤HI*:

Ä%YpI,éùRúû­üý|f4*:5"#$

É -.9&)¤  5%;@%&'*:¡*)SBAS }~0opR

J(gI(J9FY&e]9FZfqH)

JoJ()wYNgIYJq)¡*Ne¢£¤¥9¦§gIYJ-.9& : YVh)Ne¢£J(wY¨©ª«S¬­%ÉYJ-.9& f9Vq'(É*:f*)ÐÑÈÒoJ(Ne¢£¨©ª«S¬­ÊËf%É û­üýI,)Ne¸6ÊË¯%¨©ª«S¬­ÆÇ

f%Af9%É)

'( 12%56Ne¸6ÊË9 HI:SBAS oJ()Ne¢£¨©ª«S¬­¿ÀÁÂÈÉ ¨©ª«S¬­°±²Y qH)¤ÊËY³%&:@)gH\]÷J¨²³¬´EF?
+)?¥¦*Î´¦µ9Å%&:Ne¢£§¨²³¬´ÎÏ4*:éùRúû­üý®
+(nê û­üý|J )Ne¸6¤IB%YJ¥¨©ª«S¬­À¯%ÆÇ%%&'([1] International Standards and Recommended

Observation Sites

Practices, Aeronautical Telecommunications,Annex 10 to the Convention on International
Civil Aviation, vol. I, ICAO, Nov. 2002.

[3] ¶· ¸¹)Todd Walter)\GPS  ºmdZ")u»¼£)vol. 103)no. 531)
pp. 13{18)SANE2003-87)Dec. 2003.
[4] T. Sakai, K. Matsunaga, K. Hoshinoo, andT. Walter, \Evaluating Ionospheric Eãects on
SBAS in the Low Magnetic Latitude Region,"
Proc. 17th Int'l Tech. Meeting of the Satellite
Division of the Institute of Navigation (IONGNSS), pp. 1318{1328, Long Beach, CA, Sept.
2004.
[5] T. Sakai, K. Matsunaga, K. Hoshinoo, and T.
Walter, \Improving Availability of Ionospheric
Corrections in the Low Magnetic Latitude Region," Proc. ION National Technical Meeting,pp. 569{579, San Diego, CA, Jan. 2005.
[6] E. Altshuler, D. Cormier, and H. Go, \Improvements to the WAAS Ionospheric Algorithms," Proc. 15th Int'l Tech. Meeting of theSatellite Division of the Institute of Navigation (ION GPS), pp. 2256{2261, Portland, OR,Sept. 2002.

MSAS Monitors
User Stations
IGS (Ref. only)
MSAS service area

Latitude, N[2] T. Walter, A. Hansen, J. Blanch, P. Enge, T.
Mannucci, X. Pi, L. Sparks, B. IIjima, B. ElArini, R. Lejeune, M. Hagen, E. Altshuler, R.
Fries, and A. Chu, \Robust Detection of Ionospheric Irregularities," Proc. 13th Int'l Tech.
Meeting of the Satellite Division of the Institute of Navigation (ION GPS), pp. 209{218,Salt Lake City, UT, Sept. 2000.

60

45453030

MLAT
15120

135

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