令和２年度（第20回）電子航法研究所研究発表会

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࣋ࢺࢼ࣒⛉Ꮫᢏ⾡࢔࢝ࢹ࣑࣮ᆅ⌫≀⌮◊✲ᡤ /H+X\0LQKࢱ࢖࣭ࣔࣥࢡࢵࢺ⋤ᕤ⛉኱Ꮫࣛ࢝ࣂࣥ 3RUQFKDL6XSQLWKL1 ࡣࡌࡵ࡟ᆅ ୖ ᆺ ⾨ ᫍ ⯟ ἲ ⿵ ᙉ ⿦ ⨨ (Ground-BasedAugmentation System: GBAS)ࡣ GNSS ࢆ⏝࠸࡚⯟✵ᶵࡢ⢭ᐦ╔㝣㐍ධࢆᐇ⌧ࡍࡿ㸪ḟୡ௦ࡢ⯟ἲࢩࢫࢸ࣒ࡢ୍ࡘ࡛࠶ࡿࠋGBAS ࡣ㸪ࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ GNSS ᢏ⾡࡟ᇶ࡙࠸ࡓ GNSS ⿵ᙉࢩࢫࢸ࣒࡛࠶ࡾ㸪✵ ࿘㎶࡟タ⨨ࡋࡓᇶ‽ᒁ࡟ࡼࡿ⿵ᙉ᝟ሗࢆ⯟✵ᶵ࡟ᑐࡋ࡚㏦ಙࡋ㸪⯟✵ᶵࡣࡑࡢ⿵ᙉ᝟ሗ࡟ᇶ࡙࠸࡚ㄗᕪࢆ⿵ṇࡋ㸪ṇ☜࡞఩⨨ࢆᚓ࡚Ᏻ඲࡟╔㝣ࢆ⾜࠺ࠋGBAS ࡢᑟධࡣḢ⡿࡜㇦ᕞ㸪ࣟࢩ࢔ࢆ୰ᚰ࡟㐍ࡵࡽࢀ࡚࠾ࡾ㸪࢝ࢸࢦ࣮ࣜI GBAS ࡣ᪤࡟㸪⡿ᅜ㸪ࢻ࢖ࢶ㸪ࢫ࣌࢖ࣥ㸪ࢫ࢖ࢫ㸪㇦ᕞཬࡧࣟࢩ࢔࡟࠾࠸࡚㐠⏝ࡀ⾜ࢃࢀ࡚࠸ࡿࠋࡉࡽ࡟㸪࢝ࢸࢦ࣮ࣜIII GBAS ࡟ࡘ࠸࡚ࡶ㸪2018 ᖺ࡟ᅜ㝿ᶆ‽ [1]ࡀⓎຠࡋ࡚࠸ࡿࠋࡋ࠿ࡋ㸪ᚋ㏙ࡍࡿ㟁㞳ᅪࡢᙳ㡪ࡢࡓࡵ㸪㐠⏝୰ࡢ GBAS ࡣ☢Ẽ୰⦋ᗘᆅᇦ࡟㝈ࡽࢀ࡚࠸ࡿࠋ㸦ࡇࡇ࡛ࠕ☢Ẽ୰⦋ᗘࠖ࡜㏙࡭ࡓ⌮⏤࡟ࡘ࠸࡚ࡣᚋ㏙ࡍࡿࠋ㸧᪥ᮏࢆྵࡴ☢Ẽప⦋ᗘᆅᇦ࡟࠾࠸࡚ࡣ㸪ࡑࡢ≉᭷ࡢ㟁㞳ᅪάືࡢᙳ㡪࡟ࡼࡾ㸪Ᏻ඲ᛶ࡜ྍ⏝ᛶࢆ୧❧ࡉࡏࡿࡇ࡜ࡀᐜ࡛᫆ࡣ࡞ࡃ㸪࢖ࣥࢻ㸪࣐࣮ࣞࢩ࢔➼࡛㐠⏝࡟ྥࡅࡓ GBAS ࡀタ⨨ࡉࢀ࡚࠸ࡿࡶࡢࡢ㸪㐠⏝㛤ጞ࡟ࡣ⮳ࡗ࡚࠸࡞࠸ࠋࡋ࠿ࡋ࡞ࡀࡽ㸪ICAO ࢔ࢪ࢔ኴᖹὒᆅᇦ࡛ࡣ㸪
ICAO APAC GBAS/SBAS Implementation TaskForce ࡀタ❧ࡉࢀࡿ࡞࡝㸪GBAS㸪SBAS ᑟධ࡟ྥࡅࡓᶵ㐠ࡀ㧗ࡲࡗ࡚࠸ࡿࠋࡇࡢ୰࡛㸪᪥ᮏ࡛ࡣ⩚⏣✵ ࡟ᐇ⏝ GBAS ࡀタ⨨ࡉࢀ㸪2021 ᖺࡢ☢Ẽప⦋ᗘᆅᇦึࡢ GBAS㐠⏝㛤ጞ࡟ྥࡅࡓ㐠⏝ホ౯ࡀ⾜ࢃࢀ࡚࠸ࡿࠋ㟁Ꮚ⯟ἲ◊✲ᡤࡣ㸪⩚⏣✵ GBAS ࡟࠾ࡅࡿᏳ඲ᛶホ౯ࢆᨭ᥼ࡋ㸪࡜ࡾࢃࡅ᪥ᮏ௜㏆ࡢ㟁㞳ᅪࡢ⎔ቃホ౯࡟ᑓ㛛ᐙ࡜ࡋ࡚῝ࡃ㛵ࢃࡗࡓ [2]ࠋࡇࡢࡼ࠺࡟㸪᪥ᮏࡣ☢Ẽప⦋ᗘᆅᇦ࡟࠾ࡅࡿ
GBAS ᐇ⏝໬࡟࠾࠸࡚ୡ⏺࡟ඛ㥑ࡅ࡚࠾ࡾ㸪᪥ᮏⓎࡢᢏ⾡ࢆࡶࡗ࡚㸪☢Ẽప⦋ᗘᆅᇦ࡟࠾ࡅࡿ

-13-

GBAS ᬑཬ࡜ࡑࢀ࡟ࡼࡿᏳ඲࠿ࡘຠ⋡ⓗ࡞⯟✵
஺㏻ࡢᐇ⌧࡟㈉⊩࡛ࡁࡿ❧ሙ࡟࠶ࡿࠋᮏ◊✲࡛ࡣ㸪☢Ẽప⦋ᗘᆅᇦ࡟࠾࠸࡚ GBASࢆᑟධࡍࡿ㝿࡟᭱ࡶ㔜せ࡜࡞ࡿ㟁㞳ᅪ⎔ቃホ౯࡟࠾࠸࡚ᚲせ࡞஦㡯ࢆゎㄝࡍࡿ࡜࡜ࡶ࡟㸪GBAS ᑟධࡢࡓࡵࡢᐇ㝿ࡢ㟁㞳ᅪ⎔ቃㄪᰝ࡟ࡘ࠸࡚㸪㟁Ꮚ⯟ἲ◊✲ᡤࡀࡇࢀࡲ࡛࡟ᾏእ◊✲ᶵ㛵࡜༠ຊࡋ࡚⾜ࡗ࡚ࡁࡓ㟁㞳ᅪほ ࢆ౛࡜ࡋ࡚⤂௓ࡍࡿࠋᮏ◊✲࡛ࡣ㸪⌧ᅾᐇ⏝໬ࡀ㐍ࡵࡽࢀ࡚࠸ࡿ࢝ࢸࢦ࣮ࣜI GBAS ࢆ୺࡟ᑐ㇟࡜ࡍࡿࠋᅗ  GBAS ࡢ㟁㞳ᅪ✵㛫໙㓄࡟ࡼࡿㄗᕪ
2 GBAS ࡜㟁㞳ᅪ㟁㞳ᅪ࡜ࡣ㸪㧗ᗘ⣙ 60 km ௜㏆࠿ࡽ 1000 km௨ୖ࡟࠿ࡅ࡚Ꮡᅾࡍࡿ㸪ᆅ⌫኱Ẽࡀ୍㒊㟁㞳ࡋࡓ㡿ᇦ࡛࠶ࡿࠋᆅ⌫࡟ࡣ☢ሙ㸦ᆅ☢Ẽ㸧ࡀ࠶ࡾ㸪Ⲵ㟁⢏Ꮚࡢ㐠ືࡣ☢ሙ࡟ࡼࡗ࡚ᙉࡃไ㝈ࡉࢀࡿࡓࡵ㸪㟁㞳ᅪࡢᐦᗘศᕸࡑࡢ௚ࡢᛶ㉁ࡣᆅ☢Ẽࡢᙳ㡪ࢆᙉࡃཷࡅࡿࠋࡑࡢࡓࡵ㸪㟁㞳ᅪࡢᛶ㉁ࢆ㆟ㄽࡍࡿ㝿࡟ࡣᆅ⌮⦋ᗘ࡛ࡣ࡞ࡃᆅ⌫☢ሙ࡜㛵㐃࡙ࡅࡽࢀࡓ☢Ẽ⦋ᗘࡀ⏝࠸ࡽࢀࡿࠋᆅ☢ẼࡢྥࡁࡀỈᖹ࡜࡞ࡿሙᡤࢆ☢Ẽ㉥㐨࡜࠸࠺ࠋ㟁㞳኱Ẽ୰ࢆ GNSS 㟁Ἴࡀ㏻㐣ࡍࡿ㝿࡟ࡣ㸪ᒅᢡ⋡ࡀ┿✵୰࡜ࡣ␗࡞ࡿࡇ࡜࠿ࡽ㟁Ἴఏ᧛࡟㐜ࢀࡀ⏕ࡌ㸦㟁㞳ᅪ㐜ᘏ࡜࿧ࡪ㸧㸪 ㊥ㄗᕪࢆ⏕ࡌࡿࠋGBAS ࡣ㟁㞳ᅪ㐜ᘏࢆྵࡴㄗᕪࢆ㸪఩⨨ࡀ᪤▱ࡢᇶ‽ᒁࡢほ ࢹ࣮ࢱࢆ⏝࠸࡚⿵ṇࡍࡿࡀ㸪㟁㞳ᅪ㐜ᘏ㔞ࡀ✵㛫ⓗ࡟ኚືࡍࡿሙྜ㸦㟁㞳ᅪ໙㓄࡜࿧ࡪ㸧㸪⿵ṇㄗᕪ࡜࡞ࡿ㸦ᅗ 1㸧ࠋ

令和２年度（第20回）電子航法研究所研究発表会

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-16-令和２年度（第20回）電子航法研究所研究発表会㞟ィࡋ㸪ࡑࡢᶆ‽೫ᕪ࡜㸪Ⓨ⏕☜⋡ࡢ⣼✚☜⋡ᐦᗘศᕸ㛵ᩘ(CDF)ࢆồࡵࡿࠋ☜⋡ᐦᗘࡣ᏶඲࡞ṇつศᕸ࡟ࡣ࡞ࡽ࡞࠸ࡢ࡛㸪ṇつศᕸࡢCDF ࡀほ ࡉࢀࡓ CDF ࢆ 10-7 ࡛ࣞ࣋ࣝࣂ࢘ࣥࢻࡍࡿࡼ࠺࡟㸪ಖᏲⓗ࡟ᶆ‽೫ᕪ࡟ಀᩘࢆ஌ࡌࡓࡶࡢࢆߪ௩௜௚ ࡜ࡍࡿ㸦ᅗ 6㸧ࠋ࢔⩌࡜ࡋ࡚ᩚഛࡉࢀ࡚࠾ࡾ㸪ᵝࠎ࡞ࣉࣛࢵࢺࣇ࢛࣮࣒࡟࠾࠸࡚ᐜ᫆࡟⛣᳜㸪ືసྍ⬟࡛࠶ࡿࠋᅗ  㟁㞳ᅪ໙㓄⛣ື㏿ᗘ㸪ᖜࡢ᥎ᐃࠋ
6 ᾏእ㟁㞳ᅪࢹ࣮ࢱ཰㞟࣭ゎᯒ㟁Ꮚ⯟ἲ◊✲ᡤ࡛ࡣࡇࢀࡲ࡛࡟㸪ୡ⏺ྛᅜࡢ◊✲ᶵ㛵➼࡜༠ຊࡋ㸪GBAS ࡢࡓࡵࡢ㟁㞳ᅪ⎔ቃホ౯ࢆ⾜࠸ࠊ୍㒊ࡢᅜ࡟࠾࠸࡚ࡣ◊✲༠ຊࢆ㏻ࡋ࡚⊂⮬ࢹ࣮ࢱࡢྲྀᚓ࡜ゎᯒࢆ⾜ࡗ࡚࠸ࡿࠋࢱ࢖࣭ࣂࣥࢥࢡ࡟࠾࠸࡚ࡣ㸪2011 ᖺ࠿ࡽᅗ 8࡟♧ࡍほ ⥙ࢆᵓ⠏ࡋ㸪ࣔࣥࢡࢵࢺ⋤ᕤ⛉኱Ꮫࣛ࢝ࣂࣥ(KMITL) ࡜࡜ࡶ࡟㟁㞳ᅪ໙㓄ほ ࡜ゎᯒࢆ⾜ࡗ࡚࠸ࡿ [12, 13]ࠋ2019 ᖺ࠿ࡽࡣ㸪࣋ࢺࢼ࣒࣭ࣁࣀ࢖࡟࠾࠸࡚㸪࣋ࢺࢼ࣒⛉Ꮫᢏ⾡࢔࢝ࢹ࣑࣮ᆅ⌫≀⌮◊✲ᡤ࡜ඹྠ࡛㟁㞳ᅪ໙㓄ほ ࢆ㛤ጞࡋ㸪⌧ᆅ◊✲⪅࡬ࡢᢏ⾡ᣦᑟࢆ⾜ࡗ࡚࠸ࡿࠋࡇࢀࡽࡢάືࢆ㏻ࡋ㸪GBAS ᑟධࡢࡓࡵࡢ㟁㞳ᅪほ ࣭ゎᯒ࡟ࡘ࠸࡚ࡢ⌧ᆅࡢ⌮ゎࡀ῝ࡲࡾ㸪௒ᚋࡢ GBAS ᑟධ࡟ᐤ୚ࡍࡿ࡜ᮇᚅࡉࢀࡿࠋᅗ  ᆶ┤᥮⟬㟁㞳ᅪ໙㓄ࡢ CDF ࡜ߪ௩௜௚ ࠋ5.3 㟁㞳ᅪ⬣ጾࣔࢹࣝࣃ࣓࣮ࣛࢱࡢᑟฟ୍ᐃ௨ୖࡢ݃࡟ࡘ࠸࡚㸪㟁㞳ᅪᨐ஘࡟క࠺㟁㞳ᅪ໙㓄࡜ࡋ࡚㸪㟁㞳ᅪ⬣ጾࣔࢹࣝࣃ࣓࣮ࣛࢱ㸦ᅗ 3㸧ࢆᑟฟࡍࡿࠋࡲࡎ㸪݃࡟ࡘ࠸࡚㸪ࡑࡢ㟁㞳ᅪ໙㓄ࡀほ ࡉࢀࡓ⾨ᫍ௮ゅ࡜ࡢ㛵ಀࢆᅗ 4 ࡜ྠᵝࡢ᪉ἲ࡛ㄪ
࡭ࡿࠋ࢔ࢪ࢔ኴᖹὒᆅᇦ࡛ࡣ㸪600 mm/km ࢆ㉸࠼ࡿࡶࡢࡀ࡞ࡅࢀࡤ㸪࢔ࢪ࢔ኴᖹὒᆅᇦඹ㏻
GBAS 㟁㞳ᅪ⬣ጾࣔࢹࣝࡀ㐺⏝࡛ࡁࡿࠋ㉸࠼ࡿࡶࡢࡀ࠶ࢀࡤ㸪ࡑࢀ࡟ᛂࡌ࡚ୖ㝈ࢆಟṇࡍࡿࠋ⥆࠸࡚㸪2 ࿘Ἴほ ࢆ⏝࠸࡚㟁㞳ᅪ㐜ᘏ㔞ࢆ
3 ཷಙᶵࡈ࡜࡟ᑟฟࡋ㸪ࡑࡢ᫬㛫ኚື࡟ඹ㏻ࡋ࡚ぢࡽࢀࡿ≉ᚩⅬࢆᢳฟࡋ㸪݀㸪‫ݒ‬㸪‫ࢆݓ‬ồࡵࡿ [5]ࠋᅗ 7 ࡣ㸪▼ᇉᓥ࡛ほ ࡉࢀࡓࢹ࣮ࢱࢆ⏝࠸࡚‫ࢆݒ‬ᑟฟࡋࡓ౛࡛࠶ࡿࠋࡇࢀࡽࢆࡸࡣࡾ
᪤Ꮡࡢࣔࢹࣝ࡜ẚ㍑ࡋ㸪⠊ᅖෆ࡛࠶ࡿ࠿࡝࠺࠿ุᐃࡋ㸪ᚲせ࡟ᛂࡌ್࡚ࡢ⠊ᅖࢆಟṇࡍࡿࠋࡇࡇ್࡛ࡢ⠊ᅖࢆ⊃ࡵࡿሙྜࡣ㸪ಖᏲᛶࢆ๐ῶࡍࡿ᪉ྥ࡛࠶ࡿࡢ࡛㸪༑ศ࡞ࢹ࣮ࢱ㔞࡟ᇶ࡙࠸࡚࠸ࡿ࠿㸪ៅ㔜࡟ุ᩿ࡋ࡞ࡅࢀࡤ࡞ࡽ࡞࠸ᅗ  ࢱ࢖࣭ࣂࣥࢥࢡ࡟࠾ࡅࡿ㟁㞳ᅪ໙㓄ほ5.4 ゎᯒࢯࣇࢺ࢙࢘࢔ࣃࢵࢣ࣮ࢪ
5.1ࠥ5.3 ࡢᡭ㡰ࡣ㸪C ゝㄒཬࡧ Python ࡜ࣇ࣮ࣜࢯࣇࢺ࢙࢘࢔ࣛ࢖ࣈࣛࣜ࡟ࡼࡿࢯࣇࢺ࢙࢘

6. ࡲ࡜ࡵ
ᮏ◊✲࡛ࡣ㸪GBAS ᑟධ࡟࠾࠸࡚Ᏻ඲ᛶࢆᢸ-17-ࠋ

令和２年度（第20回）電子航法研究所研究発表会­*N6ŒIȋǗ9ǩȡ<36NȚșäƊïǤ«:35ȧǄŐ LjeÑȘȧǝŘ

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GPSSolutions,vol.21,pp.1937-1947,59 ƷƸƒ:ŝǣ(5 9$O>9L
9GBAS RċȎ*N:/25=ȧplWXTRċȎ*N0$69#ȧ%OL<dtk

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%OE6:ƢFȋ;5"/ıǑ!ȧŋŖ<Implementation Regional Group (2016),“GBAS Ionospheric Threat Model for APACRegion.”

GBAS ıǑ<ŴòċȎ:Ųƌ'ON%7RŕĠ
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