令和３年度（第２１回）電子航法研究所発表会

㸴㸬MSAS ࡢ㊥ᶵ⬟࡜ࡑࡢᛶ⬟ホ౯⯟ἲࢩࢫࢸ࣒㡿ᇦ ͤᆏ஭୔Ὀ㸪໭ᮧගᩍ㸪Ώ㑔ᾈᚿ1 ࡲ࠼ࡀࡁ
GPS ࡟௦⾲ࡉࢀࡿ⾨ᫍ⯟ἲࢩࢫࢸ࣒ࡢᛶ⬟ࢆ኱㝣つᶍࡢᗈ࠸⠊ᅖ࡟ࢃࡓࡗ࡚ྥୖࡉࡏࡿᗈ
ᇦ⿵ᙉࢩࢫࢸ࣒࡜ࡋ࡚㸪ICAO㸦ᅜ㝿Ẹ㛫⯟✵ᶵ㛵 㸧 ࡟ࡼ ࡿ ᶆ ‽ つ ᱁ SBAS㸦 Satellite-Based
Augmentation System㸧ࡀ࠶ࡿࠋSBAS つ᱁ࡢ⿵ᙉࢩࢫࢸ࣒࡜ࡋ࡚ࡣ㸪⡿ᅜࡢ WAAS㸪ᡃࡀᅜࡢ MSAS㸪Ḣᕞࡢ EGNOS㸪ࡑࡋ࡚࢖ࣥࢻࡢGAGAN ࡀ㐠⏝ࡉࢀ࡚࠾ࡾ㸪ࣟࢩ࢔࣭୰ᅜ࣭㡑ᅜࡶᩚഛࢆ㐍ࡵ࡚࠸ࡿࠋ
SBAS ࡢᶵ⬟ࡣ㸪㸦i㸧᏶඲ᛶࡢ⿵ᙉ㸪㸦ii㸧ࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ⿵ṇ㸪㸦iii㸧 ㊥ಙྕࡢᥦ౪㸪࡛࠶ࡿࠋࡇࡢ࠺ࡕ㸦iii㸧ࡣ SBAS ಙྕࢆ㊥ಙྕ࡜ࡋ࡚฼⏝ࡍࡿࡇ࡜ࢆព࿡ࡋ࡚࠾ࡾ㸪㐠⏝㛤ጞᙜึࡢ MSAS ࡣࡇࡢᶵ⬟ࢆᥦ౪ࡋ࡚࠸
ࡓࡀ㸪2015 ᖺ 3 ᭶௨㝆ࡣබᘧ࡟ࡣᥦ౪ࡉࢀ࡚
࠸࡞࠸ࠋ୍᪉㸪 MSAS ࡟ࡘ࠸࡚ࡣ 2020 ᖺ 4 ᭶࡟ࢩࢫࢸ࣒඲యࡀ᭦᪂ࡉࢀ㸪ᆅୖ┘どᒁࡢ㓄⨨ࡀኚ᭦ࡉࢀࡓ࡯࠿㸪㟼Ṇ⾨ᫍ࡜ࡋ࡚‽ኳ㡬⾨ᫍ
3 ྕ ᶵ 㸦 QZS-3㸧 ࢆ ౑ ⏝ ࡍ ࡿ ࡇ ࡜ ࡜ ࡞ ࡗࡓࠋ
QZS-3 ࡣ⾨ᫍᦚ㍕ࡢ࿘Ἴᩘᶆ‽࡟ࡼࡾ SBAS ಙྕࢆ⏕ᡂࡍࡿࡇ࡜࠿ࡽ㸪ᆅୖ࡛ಙྕࢆ⏕ᡂࡋ࡚࠸ࡓᚑ๓ࡢ MSAS ࡟ẚ࡭࡚㸪 ㊥⢭ᗘࡀᨵၿࡉࢀ࡚࠸ࡿྍ⬟ᛶࡀ࠶ࡿࠋ
ᙜᡤ࡛ࡣ MSAS ಙྕࡢ㐃⥆ほ ࢆᐇ᪋ࡋ࡚
࠾ࡾ㸪ほ ࢹ࣮ࢱࢆ⵳✚ࡋ࡚࠸ࡿࠋ㐣ཤࡢほࢹ࣮ࢱࢆ౑⏝ࡋ࡚㸪MSAS ࡢ᭦᪂๓ᚋࡢ ㊥ᛶ⬟ࢆㄪᰝࡋࡓࡢ࡛㸪ࡑࡢ⤖ᯝࢆሗ࿌ࡍࡿࠋ
2 SBAS ࡢ ㊥ᶵ⬟
ICAO ࡟ࡼࡿ GNSS SARPS ࡟ࡣ㸪GPS ཬࡧ
GLONASS ࡜࠶ࢃࡏ࡚㸪⿵ᙉࢩࢫࢸ࣒࡜ࡋ ࡚
SBAS࣭GBAS࣭ABAS ࡀつᐃࡉࢀ࡚࠸ࡿ[1]ࠋ
⿵ᙉࢩࢫࢸ࣒࡟ᑐࡍࡿ࿧⛠࡜ࡋ࡚㸪⿵ᙉࡉࢀࡿ
ഃࡢ GPS ཬࡧ GLONASS ࡣࢥ࢔ࢩࢫࢸ࣒࡜࿧
ࡤࢀࡿࠋ
SBAS ಙྕࡣ GPS L1 C/A ಙྕ࡜ྠ୍ࡢ࿘Ἴ
ᩘཬࡧᣑᩓኚㄪ᪉ᘧ࡜ࡉࢀ࡚࠾ࡾ㸪ᣑᩓ➢ྕ࡟ࡣ C/A ࢥ࣮ࢻࡀ౑⏝ࡉࢀࡿ㸬PRN ␒ྕࡣ 120

㹼158 ࡛㸪ࡑࡢᐃ⩏ࡣ GNSS SARPS ࡟ࡼࡿࠋSBAS ࡀᥦ౪ࡍࡿ᝟ሗࡣ࣓ࢵࢭ࣮ࢪ༢఩࡛㏦
ಙࡉࢀࡿ㸬ẖ⛊ 1 ಶࡢ࣓ࢵࢭ࣮ࢪࡀ㏵ษࢀࡿࡇ
࡜࡞ࡃ㏦ಙࡉࢀ㸪࣓ࢵࢭ࣮ࢪࡢෆᐜࡣ 0㹼63 ࡢ࣓ࢵࢭ࣮ࢪࢱ࢖ࣉ㸦MT㸧࡛㆑ูࡉࢀࡿࠋ ㊥ᶵ ⬟ ࡟ ┤ ᥋ ⓗ ࡟ 㛵 ಀ ࡍ ࡿ ࡢ ࡣ MT 9 㸦 GEO
ranging function parameters㸧ཬࡧ MT 17㸦GEO
satellite almanacs㸧࡛࠶ࡾ㸪ࡑࢀࡽࡢෆᐜࡣ⾲ 1
㹼⾲ 4 ࡢ㏻ࡾ࡛࠶ࡿࠋ
MT 9 ࡛ࡣ GPS ࡢ࢚ࣇ࢙࣓ࣜࢫ࡟┦ᙜࡍࡿ
SBAS ⾨ᫍࡢ఩⨨ཬࡧࢡࣟࢵࢡㄗᕪࡀᥦ౪ࡉࢀ
ࡿࠋMT 17 ࡟ࡣ㸪SBAS ⾨ᫍࡢᴫ␎ࡢ఩⨨᝟ሗ࡜࡜ࡶ࡟㸪ࢫࢸ࣮ࢱࢫ᝟ሗ࡜ࡋ࡚ᥦ౪ࡉࢀࡿ
ࢧ࣮ࣅࢫࡸࢧ࣮ࣅࢫࣉࣟࣂ࢖ࢲࡢ㆑ู᝟ሗ
㸦Service provider identifier㸪MSAS ࡛ࡣ 2㸧ࡀྵࡲࢀ࡚࠸ࡿࠋMT 9 ࡣ࣓ࢵࢭ࣮ࢪࢆ㏦ಙࡋ࡚
࠸ࡿ SBAS ⾨ᫍ⮬㌟ࡢ᝟ሗࡋ࠿ྵࡲ࡞࠸ࡀ㸪MT 17 ࡣ 3 ⾨ᫍศࡢ᝟ሗࢆ཰ᐜ࡛ࡁࡿࠋ
SBAS ࡢ ㊥ᶵ⬟ࢆ฼⏝ࡍࡿ࡟ࡣ㸪㸦i㸧MT
17 ࡢࢫࢸ࣮ࢱࢫ᝟ሗ࡟࠾࠸࡚ ㊥ᶵ⬟ࡀ ON࡛࠶ࡿࡇ࡜࡜㸪㸦ii㸧MT 9 ࡢ URA ࡀ 15㸦͆Do
Not Use͇㸧࡛ ࡣ ࡞࠸ࡇ ࡜ࢆ☜ㄆ ࡋ ࡓ࠺࠼ ࡛ 㸪
㸦iii㸧MT 9 ࡢ⾨ᫍ఩⨨ཬࡧࢡࣟࢵࢡ⿵ṇ್ࢆ
ᨃఝ㊥㞳࡟㐺⏝ࡍࡿࠋ࡜ࡇࢁ࡛㸪SBAS ᑐᛂ࢔ࣅ࢜ࢽࢡࢫᶵჾ࡟ࡘ
࠸࡚ࡣ⡿ᅜ RTCA ࡟ࡼࡿᢏ⾡ᇶ‽㸦MOPS㸧[2]ࡀ㐺⏝ࡉࢀࡿࠋMOPS ࡛ࡣ㸪SBAS ⾨ᫍࡢᨃఝ㊥㞳ࢆ౑⏝ࡍࡿሙྜࡣࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ⿵ṇ᝟ሗࢆ㐺⏝ࡍࡿࡇ࡜ࡀᐃࡵࡽࢀ࡚࠾ࡾ㸪ࡇࢀ࡟ࡣ ⿵ ṇ ್ ࡟ ௜ 㝶 ࡍ ࡿ UDREI ࡶ ྵ ࡲ ࢀ ࡿ ࠋ
UDREI ࡜ࡣࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ⿵ṇ㐺⏝ᚋࡢ⢭ᗘࢆ࠶ࡽࢃࡍ࢖ࣥࢹࢵࢡࢫ࡛࠶ࡾ㸪ࡑࡢᐃ⩏ࡣ ⾲ 5 ࡢ ㏻ ࡾ ࡛ ࠶ ࡿ ࠋ UDREI=14 㸦͆ Not
Monitored͇㸧ࡣ SBAS ࡟ࡼࡿ⿵ᙉࡢᑐ㇟࡛ࡣ࡞
࠸ࡇ࡜ࢆព࿡ࡋ㸪ᑐᛂࡍࡿࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ
⿵ṇ᝟ሗࡣ↓ຠ࡛࠶ࡿࠋUDREI=15㸦͆Do Not
Use͇㸧ࡣ SBAS ࡀ␗ᖖࢆ᳨ฟࡋ࡚࠸ࡿࡇ࡜ࢆ
ព࿡ࡋ㸪ᙜヱ⾨ᫍࡢᨃఝ㊥㞳ࢆ౑⏝ࡋ࡚ࡣ࡞ࡽ
࡞࠸ࠋࡍ࡞ࢃࡕ㸪UDREIӍ14 ࠶ࡿ࠸ࡣ⿵ṇ್- 29 -㸴㸬MSAS ࡢ㊥ᶵ⬟࡜ࡑࡢᛶ⬟ホ౯⯟ἲࢩࢫࢸ࣒㡿ᇦ ͤᆏ஭୔Ὀ㸪໭ᮧගᩍ㸪Ώ㑔ᾈᚿ1 ࡲ࠼ࡀࡁ
GPS ࡟௦⾲ࡉࢀࡿ⾨ᫍ⯟ἲࢩࢫࢸ࣒ࡢᛶ⬟ࢆ኱㝣つᶍࡢᗈ࠸⠊ᅖ࡟ࢃࡓࡗ࡚ྥୖࡉࡏࡿᗈ
ᇦ⿵ᙉࢩࢫࢸ࣒࡜ࡋ࡚㸪ICAO㸦ᅜ㝿Ẹ㛫⯟✵ᶵ 㛵 㸧 ࡟ ࡼ ࡿ ᶆ ‽ つ ᱁ SBAS㸦 Satellite-Based
Augmentation System㸧ࡀ࠶ࡿࠋSBAS つ᱁ࡢ⿵ᙉࢩࢫࢸ࣒࡜ࡋ࡚ࡣ㸪⡿ᅜࡢ WAAS㸪ᡃࡀᅜࡢ MSAS㸪Ḣᕞࡢ EGNOS㸪ࡑࡋ࡚࢖ࣥࢻࡢGAGAN ࡀ㐠⏝ࡉࢀ࡚࠾ࡾ㸪ࣟࢩ࢔࣭୰ᅜ࣭㡑ᅜࡶᩚഛࢆ㐍ࡵ࡚࠸ࡿࠋ
SBAS ࡢᶵ⬟ࡣ㸪㸦i㸧᏶඲ᛶࡢ⿵ᙉ㸪㸦ii㸧ࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ⿵ṇ㸪㸦iii㸧 ㊥ಙྕࡢᥦ౪㸪࡛࠶ࡿࠋࡇࡢ࠺ࡕ㸦iii㸧ࡣ SBAS ಙྕࢆ㊥ಙྕ࡜ࡋ࡚฼⏝ࡍࡿࡇ࡜ࢆព࿡ࡋ࡚࠾ࡾ㸪㐠⏝㛤ጞᙜึࡢ MSAS ࡣࡇࡢᶵ⬟ࢆᥦ౪ࡋ࡚࠸
ࡓࡀ㸪2015 ᖺ 3 ᭶௨㝆ࡣබᘧ࡟ࡣᥦ౪ࡉࢀ࡚
࠸࡞࠸ࠋ୍᪉㸪 MSAS ࡟ࡘ࠸࡚ࡣ 2020 ᖺ 4 ᭶࡟ࢩࢫࢸ࣒඲యࡀ᭦᪂ࡉࢀ㸪ᆅୖ┘どᒁࡢ㓄⨨ࡀኚ᭦ࡉࢀࡓ࡯࠿㸪㟼Ṇ⾨ᫍ࡜ࡋ࡚‽ኳ㡬⾨ᫍ
3 ྕ ᶵ 㸦 QZS-3㸧 ࢆ ౑ ⏝ ࡍ ࡿ ࡇ ࡜ ࡜ ࡞ ࡗࡓ ࠋ
QZS-3 ࡣ⾨ᫍᦚ㍕ࡢ࿘Ἴᩘᶆ‽࡟ࡼࡾ SBAS ಙྕࢆ⏕ᡂࡍࡿࡇ࡜࠿ࡽ㸪ᆅୖ࡛ಙྕࢆ⏕ᡂࡋ࡚࠸ࡓᚑ๓ࡢ MSAS ࡟ẚ࡭࡚㸪 ㊥⢭ᗘࡀᨵၿࡉࢀ࡚࠸ࡿྍ⬟ᛶࡀ࠶ࡿࠋ
ᙜᡤ࡛ࡣ MSAS ಙྕࡢ㐃⥆ほ ࢆᐇ᪋ࡋ࡚
࠾ࡾ㸪ほ ࢹ࣮ࢱࢆ⵳✚ࡋ࡚࠸ࡿࠋ㐣ཤࡢほࢹ࣮ࢱࢆ౑⏝ࡋ࡚㸪MSAS ࡢ᭦᪂๓ᚋࡢ ㊥ᛶ⬟ࢆㄪᰝࡋࡓࡢ࡛㸪ࡑࡢ⤖ᯝࢆሗ࿌ࡍࡿࠋ
2 SBAS ࡢ ㊥ᶵ⬟
ICAO ࡟ࡼࡿ GNSS SARPS ࡟ࡣ㸪GPS ཬࡧ
GLONASS ࡜࠶ࢃࡏ࡚㸪⿵ᙉࢩࢫࢸ࣒࡜ࡋ࡚
SBAS࣭GBAS࣭ABAS ࡀつᐃࡉࢀ࡚࠸ࡿ[1]ࠋ
⿵ᙉࢩࢫࢸ࣒࡟ᑐࡍࡿ࿧⛠࡜ࡋ࡚㸪⿵ᙉࡉࢀࡿ
ഃࡢ GPS ཬࡧ GLONASS ࡣࢥ࢔ࢩࢫࢸ࣒࡜࿧
ࡤࢀࡿࠋ
SBAS ಙྕࡣ GPS L1 C/A ಙྕ࡜ྠ୍ࡢ࿘Ἴ
ᩘཬࡧᣑᩓኚㄪ᪉ᘧ࡜ࡉࢀ࡚࠾ࡾ㸪ᣑᩓ➢ྕ࡟ࡣ C/A ࢥ࣮ࢻࡀ౑⏝ࡉࢀࡿ㸬PRN ␒ྕࡣ 120

㹼158 ࡛㸪ࡑࡢᐃ⩏ࡣ GNSS SARPS ࡟ࡼࡿࠋSBAS ࡀᥦ౪ࡍࡿ᝟ሗࡣ࣓ࢵࢭ࣮ࢪ༢఩࡛㏦
ಙࡉࢀࡿ㸬ẖ⛊ 1 ಶࡢ࣓ࢵࢭ࣮ࢪࡀ㏵ษࢀࡿࡇ
࡜࡞ࡃ㏦ಙࡉࢀ㸪࣓ࢵࢭ࣮ࢪࡢෆᐜࡣ 0㹼63 ࡢ࣓ࢵࢭ࣮ࢪࢱ࢖ࣉ㸦MT㸧࡛㆑ูࡉࢀࡿࠋ ㊥ᶵ ⬟ ࡟ ┤ ᥋ ⓗ ࡟ 㛵 ಀ ࡍ ࡿ ࡢ ࡣ MT 9 㸦 GEO
ranging function parameters㸧ཬࡧ MT 17㸦GEO
satellite almanacs㸧࡛࠶ࡾ㸪ࡑࢀࡽࡢෆᐜࡣ⾲ 1
㹼⾲ 4 ࡢ㏻ࡾ࡛࠶ࡿࠋ
MT 9 ࡛ࡣ GPS ࡢ࢚ࣇ࢙࣓ࣜࢫ࡟┦ᙜࡍࡿ
SBAS ⾨ᫍࡢ఩⨨ཬࡧࢡࣟࢵࢡㄗᕪࡀᥦ౪ࡉࢀ
ࡿࠋMT 17 ࡟ࡣ㸪SBAS ⾨ᫍࡢᴫ␎ࡢ఩⨨᝟ሗ࡜࡜ࡶ࡟㸪ࢫࢸ࣮ࢱࢫ᝟ሗ࡜ࡋ࡚ᥦ౪ࡉࢀࡿ
ࢧ࣮ࣅࢫࡸࢧ࣮ࣅࢫࣉࣟࣂ࢖ࢲࡢ㆑ู᝟ሗ
㸦Service provider identifier㸪MSAS ࡛ࡣ 2㸧ࡀྵࡲࢀ࡚࠸ࡿࠋMT 9 ࡣ࣓ࢵࢭ࣮ࢪࢆ㏦ಙࡋ࡚
࠸ࡿ SBAS ⾨ᫍ⮬㌟ࡢ᝟ሗࡋ࠿ྵࡲ࡞࠸ࡀ㸪MT 17 ࡣ 3 ⾨ᫍศࡢ᝟ሗࢆ཰ᐜ࡛ࡁࡿࠋ
SBAS ࡢ ㊥ᶵ⬟ࢆ฼⏝ࡍࡿ࡟ࡣ㸪㸦i㸧MT
17 ࡢࢫࢸ࣮ࢱࢫ᝟ሗ࡟࠾࠸࡚ ㊥ᶵ⬟ࡀ ON࡛࠶ࡿࡇ࡜࡜㸪㸦ii㸧MT 9 ࡢ URA ࡀ 15㸦͆Do
Not Use͇㸧 ࡛ ࡣ ࡞ ࠸ࡇ ࡜ ࢆ ☜ ㄆ ࡋ ࡓ ࠺ ࠼ ࡛ 㸪
㸦iii㸧MT 9 ࡢ⾨ᫍ఩⨨ཬࡧࢡࣟࢵࢡ⿵ṇ್ࢆ
ᨃఝ㊥㞳࡟㐺⏝ࡍࡿࠋ࡜ࡇࢁ࡛㸪SBAS ᑐᛂ࢔ࣅ࢜ࢽࢡࢫᶵჾ࡟ࡘ
࠸࡚ࡣ⡿ᅜ RTCA ࡟ࡼࡿᢏ⾡ᇶ‽㸦MOPS㸧[2]ࡀ㐺⏝ࡉࢀࡿࠋMOPS ࡛ࡣ㸪SBAS ⾨ᫍࡢᨃఝ㊥㞳ࢆ౑⏝ࡍࡿሙྜࡣࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ⿵ṇ᝟ሗࢆ㐺⏝ࡍࡿࡇ࡜ࡀᐃࡵࡽࢀ࡚࠾ࡾ㸪ࡇࢀ࡟ࡣ ⿵ ṇ ್ ࡟ ௜ 㝶 ࡍ ࡿ UDREI ࡶ ྵ ࡲ ࢀ ࡿ ࠋ
UDREI ࡜ࡣࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ⿵ṇ㐺⏝ᚋࡢ⢭ᗘࢆ࠶ࡽࢃࡍ࢖ࣥࢹࢵࢡࢫ࡛࠶ࡾ㸪ࡑࡢᐃ⩏ࡣ ⾲ 5 ࡢ ㏻ ࡾ ࡛ ࠶ ࡿ ࠋ UDREI=14 㸦͆ Not
Monitored͇㸧ࡣ SBAS ࡟ࡼࡿ⿵ᙉࡢᑐ㇟࡛ࡣ࡞
࠸ࡇ࡜ࢆព࿡ࡋ㸪ᑐᛂࡍࡿࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ
⿵ṇ᝟ሗࡣ↓ຠ࡛࠶ࡿࠋUDREI=15㸦͆Do Not
Use͇㸧ࡣ SBAS ࡀ␗ᖖࢆ᳨ฟࡋ࡚࠸ࡿࡇ࡜ࢆ
ព࿡ࡋ㸪ᙜヱ⾨ᫍࡢᨃఝ㊥㞳ࢆ౑⏝ࡋ࡚ࡣ࡞ࡽ
࡞࠸ࠋࡍ࡞ࢃࡕ㸪UDREIӍ14 ࠶ࡿ࠸ࡣ⿵ṇ್- 29 -

令和３年度（第２１回）電子航法研究所発表会

⾲ 1 䝯䝑䝉䞊䝆䝍䜲䝥 9䠄㟼Ṇ⾨ᫍ

㊥ᶵ⬟䠅

Data

Resolution

URA

Bits

Range

⾲ 1 䝯䝑䝉䞊䝆䝍䜲䝥 9䠄㟼Ṇ⾨ᫍ

㊥ᶵ⬟䠅

Accuracy [m]DataResolution

URA

⾲ 3 URA䠄User Range Accuracy䠅䛾ᐃ⩏䠄RMS䠅
Accuracy [m]

URA

Bits

Range

⾲ 3 URA䠄User Range Accuracy䠅䛾ᐃ⩏䠄RMS䠅
Accuracy [m]URA

Accuracy [m](Reserved)

8

䇷

䇷

0

2

8

64

(Reserved)

8

䇷

䇷

0

2

8

64

t0,GEO13

0 to 86384

16

1

2.8

9

128

t0,GEO13

0 to 86384

16

1

2.8

9

128

URA

4

0 to 15

1

2

4

10

256

URA

4

0 to 15

1

2

4

10

256

30

㼼42949673 m

0.08 m

3

5.7

11

512

30

㼼42949673 m

0.08 m

3

5.7

11

512

30

㼼42949673 m

0.08 m

4

8

12

1024

30

㼼42949673 m

0.08 m

4

8

12

1024

25

㼼6710886.4 m

0.4 m

5

11.3

13

2048

25

㼼6710886.4 m

0.4 m

5

11.3

13

2048

17

㼼40.96 m/s

0.625 mm/s

6

16

14

4096

17

㼼40.96 m/s

0.625 mm/s

6

16

14

4096

17

㼼40.96 m/s

0.625 mm/s

7

32

15

“Do Not Use”

17

㼼40.96 m/s

0.625 mm/s

7

32

15

“Do Not Use”

18

㼼524.288 m/s

4 mm/s18

㼼524.288 m/s

4 mm/s10

㼼6.4 mm/s2

1.25 Pm/s2

10

㼼6.4 mm/s2

1.25 Pm/s2

10

㼼6.4 mm/s

210

㼼6.4 mm/s

222

⾲ 4 Health and Status䠄MT 17䠅䛾ෆᐜ

1.25 Pm/s

2

Bit

6.25 Pm/s

2

Contents

Range

10

㼼32 mm/s

0

RangingaGf0

12

㼼0.9537 Ps

2-31 s1

Precision corrections

aGf1

8

㼼0.11642 ns/s

2-40 s/s

2

Satellite status and basic corrections

3(Spare)⾲ 2 䝯䝑䝉䞊䝆䝍䜲䝥 17䠄㟼Ṇ⾨ᫍ䜰䝹䝬䝘䝑䜽䠅
Data

Bits

Range

Resolution(Reserved)

2

䇷

䇷

4 to 7

0: ON
1: OFF

Service provider identifier

0 to 15

2

1

UDREI

Health &status8䇷䇷

00.052082.546530

㼼42598.4 km

2.6 km1

0.092493.3260

For 3
GEOs

30

㼼42598.4 km

2.6 kmtalmanac

26 km

㼼40 m/s

10 m/s17

㼼40 m/s

10 m/s18

㼼480 m/s

60 m/s110䡚86336 s

64 s

ࡀ↓ຠࡢሙྜࡣ SBAS ⾨ᫍࡢᨃఝ㊥㞳ࡣ౑⏝࡛ࡁ࡞࠸ࠋ
MOPS ࡛ࡣ㸪SBAS ࡢ ㊥ᶵ⬟ࢆ฼⏝ࡍࡿሙ
ྜࡣ㸪MT 17 ࡟グ㍕ࡉࢀ࡚࠸ࡿ⾨ᫍ఩⨨࡜฼⏝
ࡍࡿ⾨ᫍࡀ㏦ಙࡋ࡚࠸ࡿ MT 9 ࠿ࡽồࡵࡓ⾨ᫍ఩⨨ࡢᕪࡀ 200 km ௨ෆ࡛࠶ࡿࡇ࡜ࢆ☜ㄆࡍࡿࡇ࡜ࡶᐃࡵࡽࢀ࡚࠸ࡿࠋࡇࡢ┠ⓗࡣ┦஫┦㛵ࡢᙳ㡪࡟ࡼࡾู⾨ᫍࡢಙྕࢆ㏣ᑿࡋ࡚࠸ࡿሙྜ࡟
ࡑࢀࢆ᳨ฟࡍࡿࡇ࡜࡛㸪SBAS ⾨ᫍࡣ࠸ࡎࢀࡶ
ࢻࢵࣉࣛ࿘Ἴᩘࡀᑠࡉ࠸ࡇ࡜࠿ࡽ┦஫┦㛵ࡀ኱ࡁࡃ࡞ࡾࡸࡍ࠸ࡇ࡜ࡢᑐ⟇࡛࠶ࡿࠋ ㊥ᶵ⬟ࢆ฼⏝ࡋ࡞࠸࡟ࡶ࠿࠿ࢃࡽࡎࡇࡢ☜ㄆࢆᐇ⾜ࡍࡿ࢔ࣅ࢜ࢽࢡࢫᶵჾࡀᏑᅾࡍࡿࡇ࡜࠿ࡽ㸪࠸ࡎࢀ
ࡢ SBAS ࡶ ㊥ᶵ⬟ࡢᥦ౪ࡢ᭷↓࡟ࡼࡽࡎ MT
9 ࢆ㏦ಙࡋ࡚࠸ࡿࠋࡍ࡞ࢃࡕ㸪MT 9 ࡀ㏦ಙࡉ

[m ]

UDREI

㼼32 mm/s

0

Ranging㼼0.9537 Ps

2-31 s1

Precision corrections

aGf1

8

㼼0.11642 ns/s

2-40 s/s

2

Satellite status and basic corrections

3(Spare)⾲ 2 䝯䝑䝉䞊䝆䝍䜲䝥 17䠄㟼Ṇ⾨ᫍ䜰䝹䝬䝘䝑䜽䠅

[m ]

2

0.144410

5.196830.283011

20.7870

GEOs

4

0.467812230.9661

50.8315132078.695

6

1.299214“Not Monitored”

7

1.870915“Do Not Use”

㊥ᶵ⬟ࡀᥦ౪ࡉࢀࡿࡇ࡜ࢆព

3 MSAS ࡢᵓᡂ
MSAS ࡢྡ⛠ ࡣ౑⏝ࡍ ࡿ㟼Ṇ⾨ ᫍ MTSAT㸦Multi-functional Transport Satellite㸸㐠㍺ከ┠ⓗ ⾨ ᫍ 㸧 ࡟ ࡕ ࡞ ࢇ ࡛ MTSAT-based Satellite
Augmentation System ࡢ␎࡜ࡉࢀ࡚࠸ࡓࡀ㸪᭱㏆ ࡣ QZS-3 ࢆ ౑ ⏝ ࡍ ࡿ ࡇ ࡜ ࡜ ࡞ ࡗ ࡓ ࡓ ࡵMichibiki-based Satellite Augmentation System ࡟ኚ᭦ࡉࢀ࡚࠸ࡿࠋMTSAT ࡟ࡼࡿᪧ MSAS ࢆ
MSAS V1㸪QZS-3 ࡟ࡼࡿ᪂ MSAS ࢆ MSAS V2
࡜⛠ࡋ࡚༊ูࡍࡿࡇ࡜ࡀ࠶ࡿࠋ
3.1 ᪧ MSAS㸦MSAS V1㸧࣭MRS ࠶ࡾ2007 ᖺ 9 ᭶ 27 ᪥ࡢ㐠⏝㛤ጞ᫬ࡢᵓᡂࡣ㸪⯟- 30 -

Range

10

For 3

ࢀ࡚࠸ࡿࡇ࡜ࡣ
࿡ࡋ࡞࠸ࠋ

6.25 Pm/s

Contents

12

2

0 to 210

㼼6656 km

Bit

2

aGf0

⾲ 5 UDREI 䛾ᐃ⩏

825

1.25 Pm/s

䇷

PRN

17

⾲ 4 Health and Status䠄MT 17䠅䛾ෆᐜ

2

4 to 7

0: ON
1: OFF䇷

Service provider identifier

0 to 15

Data

Bits

Range

Resolution(Reserved)

2

䇷

䇷

PRN

8

0 to 210

1

UDREI

Health &status8䇷䇷

00.052082.546530

㼼42598.4 km

2.6 km1

0.092493.326030

㼼42598.4 km

2.6 km20.144410

5.196830.283011

20.787040.467812230.9661

50.8315132078.695

6

1.299214“Not Monitored”

7

1.870915“Do Not Use”

talmanac25

㼼6656 km

26 km

17

㼼40 m/s

10 m/s17

㼼40 m/s

10 m/s18

㼼480 m/s

60 m/s110䡚86336 s

64 s

⾲ 5 UDREI 䛾ᐃ⩏ࡀ↓ຠࡢሙྜࡣ SBAS ⾨ᫍࡢᨃఝ㊥㞳ࡣ౑⏝࡛ࡁ࡞࠸ࠋ
MOPS ࡛ࡣ㸪SBAS ࡢ ㊥ᶵ⬟ࢆ฼⏝ࡍࡿሙ
ྜࡣ㸪MT 17 ࡟グ㍕ࡉࢀ࡚࠸ࡿ⾨ᫍ఩⨨࡜฼⏝
ࡍࡿ⾨ᫍࡀ㏦ಙࡋ࡚࠸ࡿ MT 9 ࠿ࡽồࡵࡓ⾨ᫍ఩⨨ࡢᕪࡀ 200 km ௨ෆ࡛࠶ࡿࡇ࡜ࢆ☜ㄆࡍࡿࡇ࡜ࡶᐃࡵࡽࢀ࡚࠸ࡿࠋࡇࡢ┠ⓗࡣ┦஫┦㛵ࡢᙳ㡪࡟ࡼࡾู⾨ᫍࡢಙྕࢆ㏣ᑿࡋ࡚࠸ࡿሙྜ࡟
ࡑࢀࢆ᳨ฟࡍࡿࡇ࡜࡛㸪SBAS ⾨ᫍࡣ࠸ࡎࢀࡶ
ࢻࢵࣉࣛ࿘Ἴᩘࡀᑠࡉ࠸ࡇ࡜࠿ࡽ┦஫┦㛵ࡀ኱ࡁࡃ࡞ࡾࡸࡍ࠸ࡇ࡜ࡢᑐ⟇࡛࠶ࡿࠋ ㊥ᶵ⬟ࢆ฼⏝ࡋ࡞࠸࡟ࡶ࠿࠿ࢃࡽࡎࡇࡢ☜ㄆࢆᐇ⾜ࡍࡿ࢔ࣅ࢜ࢽࢡࢫᶵჾࡀᏑᅾࡍࡿࡇ࡜࠿ࡽ㸪࠸ࡎࢀ
ࡢ SBAS ࡶ ㊥ᶵ⬟ࡢᥦ౪ࡢ᭷↓࡟ࡼࡽࡎ MT
9 ࢆ㏦ಙࡋ࡚࠸ࡿࠋࡍ࡞ࢃࡕ㸪MT 9 ࡀ㏦ಙࡉ[m2]ࢀ࡚࠸ࡿࡇ࡜ࡣ
࿡ࡋ࡞࠸ࠋ

UDREI

[m2]

㊥ᶵ⬟ࡀᥦ౪ࡉࢀࡿࡇ࡜ࢆព

3 MSAS ࡢᵓᡂ
MSAS ࡢ ྡ ⛠ ࡣ౑ ⏝ ࡍ ࡿ 㟼 Ṇ ⾨ ᫍ MTSAT㸦Multi-functional Transport Satellite㸸㐠㍺ከ┠ⓗ ⾨ ᫍ 㸧 ࡟ ࡕ ࡞ ࢇ ࡛ MTSAT-based Satellite
Augmentation System ࡢ␎࡜ࡉࢀ࡚࠸ࡓࡀ㸪᭱㏆ ࡣ QZS-3 ࢆ ౑ ⏝ ࡍ ࡿ ࡇ ࡜ ࡜ ࡞ ࡗ ࡓ ࡓ ࡵMichibiki-based Satellite Augmentation System ࡟ኚ᭦ࡉࢀ࡚࠸ࡿࠋMTSAT ࡟ࡼࡿᪧ MSAS ࢆ
MSAS V1㸪QZS-3 ࡟ࡼࡿ᪂ MSAS ࢆ MSAS V2
࡜⛠ࡋ࡚༊ูࡍࡿࡇ࡜ࡀ࠶ࡿࠋ
3.1 ᪧ MSAS㸦MSAS V1㸧࣭MRS ࠶ࡾ2007 ᖺ 9 ᭶ 27 ᪥ࡢ㐠⏝㛤ጞ᫬ࡢᵓᡂࡣ㸪⯟- 30 -

令和３年度（第２１回）電子航法研究所発表会ἲ⤫ไᒁ㸦MCS㸸Master Control Station㸧ࡀ 2ᒁ㸪┘どᒁ㸦GMS㸸Ground Monitor Station㸧ࡀ
6 ᒁ 㸦 ࠺ ࡕ 2 ᒁ ࡣ MCS ࡟ ే タ 㸧㸪 ᶆ ᐃ ᒁ㸦MRS㸸Monitor and Ranging Station㸧ࡀ 2 ᒁ㸪ཬࡧ㟼Ṇ⾨ᫍ 2 ᶵ㸦MTSAT-1R ཬࡧ MTSAT2㸧࡛࠶ࡗࡓ[3]-[5]ࠋ඲యࡢᵓᡂࡣᅗ 1 ࡢ㏻ࡾ࡛࠶ࡾ㸪2 ᒁࡢ MRS ࡣ㟼Ṇ⾨ᫍࡢ㌶㐨Ỵᐃ⢭ᗘࢆᨵၿࡍࡿࡓࡵ࡟ࣁ࣡࢖ཬࡧ࣮࢜ࢫࢺࣛࣜ࢔࡟タࡅࡽࢀ࡚࠸ࡓࠋ
SBAS ಙྕࡢ㏦ಙࡣ࣋ࣥࢺࣃ࢖ࣉࢺࣛࣥࢫ࣏
ࣥࢲ᪉ᘧ࡟ࡼࡿࠋࡍ࡞ࢃࡕ㸪MCS ෆࡢ࿘Ἴᩘ
ᶆ‽࡟ࡼࡾ㸦࿘Ἴᩘࡢࡳ␗࡞ࡿ㸧SBAS ಙྕࢆ⏕ᡂࡋ࡚㟼Ṇ⾨ᫍ࡟࢔ࢵࣉࣜࣥࢡࡋ㸪ࡇࢀࡀ࿘Ἴᩘኚ᥮ࡉࢀ࡚฼⏝⪅ྥࡅ࡟㏦ಙࡉࢀࡿࠋ㸬
2 ᒁࡢ MCS ࡣᇶᮏⓗ࡟ࡣࡑࢀࡒࢀ 1 ᶵࡎࡘࡢ㟼Ṇ⾨ᫍ࡟ᑐᛂࡋ࡚࠾ࡾ㸪⚄ᡞᒁ㸦KASC㸸
Kobe Aeronautical Satellite Center㸧ࡣ PRN129 ࢆ⏝࠸࡚ MTSAT-1R ࠿ࡽ㸪ᖖ㝣ኴ⏣ᒁ㸦HASC㸸
Hitachi-Ota ASC㸧ࡣ PRN137 ࡟ࡼࡾ MTSAT-2
࠿ࡽ SBAS ಙྕࢆ㏦ಙࡍࡿࠋࡓࡔࡋ㸪୧㟼Ṇ⾨ᫍࡣࢹࣗ࢔ࣝ PRN ᶵ⬟ࢆࡶࡕ㸪࠸ࡎࢀ࠿୍᪉
࠶ࡿ࠸ࡣ୧᪉ࡢ MCS ࡢಙྕࢆ୰⥅࡛ࡁࡓࠋࡇ
ࢀ࡟ࡼࡾ㸪⾨ᫍࡢಖᏲసᴗ᫬࡟࠾࠸࡚ࡶ࢔࣋࢖
ࣛࣅࣜࢸ࢕ࢆୗࡆࡿࡇ࡜࡞ࡃ MSAS ࡢ㐠⏝ࢆ⥅⥆࡛ࡁࡓࠋ
ࡇࡢ᫬ᮇࡢ MSAS ࡣ MRS ࡀ࠶ࡿࡇ࡜࡛㟼Ṇ
⾨ᫍࡢ㌶㐨ᶆᐃ⢭ᗘࡀⰋዲ࡛࠶ࡾ㸪බᘧ࡟ ㊥ᶵ⬟ࢆᥦ౪ࡋ࡚࠸ࡓࠋࡓࡔࡋ㸪࿘㎶ᅜ࡜ࡢ࿘Ἴ
ᩘㄪᩚ࡟ࡼࡾ ࢺࣛࣥࢫ࣏ࣥࢲࡢᖏᇦᖜࡀ 2.2
MHz ࡟㝈ࡽࢀ࡚࠸ࡓࡇ࡜࠿ࡽ ㊥⢭ᗘࡣࡑࢀ࡯࡝Ⰻዲ࡛ࡣ࡞ࡃ㸪URA=6㸦16 m㸧⛬ᗘࡀタᐃ ࡉ ࢀ ࡚ ࠸ ࡓ ࠋ ᙜ ↛ ࡞ ࡀ ࡽ 㸪 PRN129 ཬ ࡧ
PRN137 ࡟ᑐࡍࡿࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ⿵ṇ᝟ሗ
ࡶ㏦ಙࡉࢀ࡚࠸ࡓࠋ
 ᪧ MSAS㸦MSAS V1㸧࣭MRS ࡞ࡋ
3.2
2005 ᖺ࡟ᡴࡕୖࡆࡽࢀࡓ MTSAT-1R ࡟ࡘ࠸࡚ࡣ㸪10 ᖺ㛫ࡢ㐠⏝ᮇ㛫ࡀ⤒㐣ࡋࡓࡇ࡜࠿ࡽ
2015 ᖺ 9 ᭶ 28 ᪥࡟౑⏝ࢆ೵Ṇࡋ㸪ྠᖺ 12 ᭶
10 ᪥࡟㐠⏝ࢆ⤊஢ࡋࡓ[7]ࠋ2 ᒁࡢ MRS ࡟ࡘ࠸࡚ࡣ㸪ࡇࢀ࡟ඛ❧ࡗ࡚ྠᖺ 3 ᭶ 30 ᪥ࢆࡶࡗ࡚
ᗫṆࡉࢀ࡚࠸ࡓࠋ
㟼Ṇ⾨ᫍࡣ 1 ᶵ࡜࡞ࡗࡓࡀ㸪MSAS ಙྕ࡟ࡘ࠸࡚ࡣ KASC ཬࡧ HASC ࡛ᘬࡁ⥆ࡁ⏕ᡂࡉࢀ㸪
MTSAT-2 ࡢࢹࣗ࢔ࣝ PRN ᶵ⬟࡟ࡼࡾࡑࢀࡒࢀ

PRN129 ཬࡧ PRN137 ࡜ࡋ࡚㏦ಙࡉࢀࡓࠋ
㊥ᶵ⬟ࡣᥦ౪ࡉࢀ࡞࠸ࡇ࡜࡜࡞ࡗࡓࡀ㸪MT 17 ࡛ࡣ ㊥ᶵ⬟ࡀ ON ࡛࠶ࡾ㸪MT 9 ࡛ࡣ
URA=14㸦4096 m㸧ࡀタᐃࡉࢀ㸪ṇᖖ࡞⾨ᫍ఩⨨ཬࡧࢡࣟࢵࢡ⿵ṇ್ࡀ㏦ಙࡉࢀ࡚࠸ࡓࠋࡇࡢ
⌮⏤ࡣඛ࡟㏙࡭ࡓ࢔ࣅ࢜ࢽࢡࢫᶵჾࡢ௙ᵝ࡟ࡼࡿࠋࡓࡔࡋ㸪PRN129 ཬࡧ PRN137 ࡟ᑐࡍࡿࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ⿵ṇ᝟ሗ࡟ࡘ࠸࡚ࡣUDREI=14 ࡀタᐃࡉࢀ㸦ࡓࡔࡋ⿵ṇ್ࡣ↓ຠ್࡛ࡣ࡞࠸㸧㸪 ㊥ᶵ⬟ࢆ฼⏝࡛ࡁ࡞࠸ࡼ࠺࡟ࡉ
ࢀ࡚࠸ࡓࠋ
3.3 ᪂ MSAS㸦MSAS V2㸧
2020 ᖺ 4 ᭶㸪MSAS ࡣ㟼Ṇ⾨ᫍཬࡧᆅୖ᪋タࡀ඲ 㠃ⓗ࡟᭦ ᪂ࡉࢀࡓ [6]-[9]ࠋ㟼Ṇ ⾨ ᫍ ࡣ
MTSAT-2 ࠿ࡽ QZS-3 ࡟ษࡾ᭰࠼ࡽࢀ㸪L1Sb ಙྕ ࢆ ౑ ⏝ ࡋ ࡚ PRN137 ࡀ ㏦ ಙ ࡉ ࢀ ࡚ ࠸ ࡿ ࠋ
GMS ࡣᅜෆ 13 ᒁ࡜࡞ࡾ㸪MCS ࡣ୺ᒁࢆᖖ㝣ኴ⏣㸪ࣂࢵࢡ࢔ࢵࣉᒁࢆᡤἑ࡟タ⨨ࡋ࡚࠸ࡿ㸦ᅗ 2㸧ࠋ
㟼Ṇ⾨ᫍࡀ QZS-3 ࡟ኚ᭦ࡉࢀࡓࡇ࡜࡟ࡼࡾ㸪
QZS-3 ࡀ ㏦ ಙ ࡍ ࡿ ௚ ࡢ ㊥ ಙ ྕ ࡜ ྠ ᵝ ࡟ 㸪
SBAS ಙྕࡶ⾨ᫍᦚ㍕࿘Ἴᩘᶆ‽࡟ࡶ࡜࡙࠸࡚
⾨ᫍෆ㒊࡛⏕ᡂࡉࢀ࡚࠸ࡿࠋࡍ࡞ࢃࡕ㸪௚ࡢࡍ
࡭࡚ࡢ SBAS ࡀ᥇⏝ࡋ࡚࠸ࡿ࣋ࣥࢺࣃ࢖ࣉࢺࣛ
ࣥࢫ࣏ࣥࢲ᪉ᘧ࡛ࡣ࡞࠸ࡇ࡜࡜࡞ࡗࡓࠋࡇࢀ࡟
ࡼࡾ࿘Ἴᩘㄪᩚୖࡢၥ㢟ࡀ⦆࿴ࡉࢀࡿࡇ࡜࠿ࡽ
ᗈ࠸ᖏᇦᖜ࡟ࡼࡿ ㊥⢭ᗘࡢᨵၿࢆᮇᚅ࡛ࡁࡿ
ࡀ㸪୍᪉࡛᏶඲ᛶࡢ☜ಖ࡟࠾ࡅࡿࣜ࢔ࣝࢱ࢖࣒
ᛂ⟅ᛶ⬟࡟ࡣὀពࡀᡶࢃࢀࡿࡇ࡜࡜࡞ࡗࡓࠋ
GMS ࡀಸቑࡋ࡚࠸ࡿ࡜ࡣ࠸࠼ᅜෆᒁࡢࡳࡢ
ᵓᡂࡢࡓࡵ㸪 ㊥ᶵ⬟࡟ࡘ࠸࡚ࡣᥦ౪ࡉࢀ࡞࠸ࠋ
඲㠃ⓗ࡞᭦᪂࡟క࠺ㅖసᴗࢆඃඛࡍࡿࡓࡵ㸪ᛶ⬟㠃࡟ࡘ࠸࡚ࡢᨵၿࡣᅗࡽࡎ㸪ᚑ๓ࡢᛶ⬟ࢆ⥔ᣢࡍࡿࡇ࡜࡜ࡉࢀࡓࠋ
฼⏝⪅࡟࡜ࡗ࡚ࡣ㸪MT 17 ࡟ PRN129 ࡟ᑐᛂ
ࡍࡿ⾨ᫍࡀ࡞ࡃ࡞ࡾ㸪ࡲࡓ MT 9 ཬࡧ MT 17 ࡢ⾨ᫍ఩⨨ࡀኚ᭦ࡉࢀ࡚࠸ࡿࠋᪧࢩࢫࢸ࣒࡜ྠᵝ࡛࠶ࡿࡀ㸪 ㊥ᶵ⬟ࡣᥦ౪ࡉࢀ࡞࠸࡜ࡣ࠸࠺ࡶ
ࡢࡢ MT 17 ࡛ࡣ ㊥ᶵ⬟ࡀ ON ࡛࠶ࡾ㸪MT 9
࡛ࡣ URA=14 ࡀタᐃࡉࢀ࡚࠸ࡿࠋࡓࡔࡋ㸪⾨ᫍ఩⨨ࡀṇᖖ࡞୍᪉࡛ࢡࣟࢵࢡ⿵ṇ್ࡣ㈇ࡢ᭱
኱್㸦-285.9 m㸧࡟タᐃࡉࢀ࡚࠾ࡾ㸪PRN137
࡟ᑐࡍࡿࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ⿵ṇ᝟ሗࡣ
UDREI=14 ཬࡧ↓ຠ್࡜࡞ࡗ࡚࠸ࡿࠋ

- 31 -

ἲ⤫ไᒁ㸦MCS㸸Master Control Station㸧ࡀ 2ᒁ㸪┘どᒁ㸦GMS㸸Ground Monitor Station㸧ࡀ
6 ᒁ 㸦 ࠺ ࡕ 2 ᒁ ࡣ MCS ࡟ ే タ 㸧㸪 ᶆ ᐃ ᒁ㸦MRS㸸Monitor and Ranging Station㸧ࡀ 2 ᒁ㸪ཬࡧ㟼Ṇ⾨ᫍ 2 ᶵ㸦MTSAT-1R ཬࡧ MTSAT2㸧࡛࠶ࡗࡓ[3]-[5]ࠋ඲యࡢᵓᡂࡣᅗ 1 ࡢ㏻ࡾ࡛࠶ࡾ㸪2 ᒁࡢ MRS ࡣ㟼Ṇ⾨ᫍࡢ㌶㐨Ỵᐃ⢭ᗘࢆᨵၿࡍࡿࡓࡵ࡟ࣁ࣡࢖ཬࡧ࣮࢜ࢫࢺࣛࣜ࢔࡟タࡅࡽࢀ࡚࠸ࡓࠋ
SBAS ಙྕࡢ㏦ಙࡣ࣋ࣥࢺࣃ࢖ࣉࢺࣛࣥࢫ࣏
ࣥࢲ᪉ᘧ࡟ࡼࡿࠋࡍ࡞ࢃࡕ㸪MCS ෆࡢ࿘Ἴᩘ
ᶆ‽࡟ࡼࡾ㸦࿘Ἴᩘࡢࡳ␗࡞ࡿ㸧SBAS ಙྕࢆ⏕ᡂࡋ࡚㟼Ṇ⾨ᫍ࡟࢔ࢵࣉࣜࣥࢡࡋ㸪ࡇࢀࡀ࿘Ἴᩘኚ᥮ࡉࢀ࡚฼⏝⪅ྥࡅ࡟㏦ಙࡉࢀࡿࠋ㸬
2 ᒁࡢ MCS ࡣᇶᮏⓗ࡟ࡣࡑࢀࡒࢀ 1 ᶵࡎࡘࡢ㟼Ṇ⾨ᫍ࡟ᑐᛂࡋ࡚࠾ࡾ㸪⚄ᡞᒁ㸦KASC㸸
Kobe Aeronautical Satellite Center㸧ࡣ PRN129 ࢆ⏝࠸࡚ MTSAT-1R ࠿ࡽ㸪ᖖ㝣ኴ⏣ᒁ㸦HASC㸸
Hitachi-Ota ASC㸧ࡣ PRN137 ࡟ࡼࡾ MTSAT-2
࠿ࡽ SBAS ಙྕࢆ㏦ಙࡍࡿࠋࡓࡔࡋ㸪୧㟼Ṇ⾨ᫍࡣࢹࣗ࢔ࣝ PRN ᶵ⬟ࢆࡶࡕ㸪࠸ࡎࢀ࠿୍᪉
࠶ࡿ࠸ࡣ୧᪉ࡢ MCS ࡢಙྕࢆ୰⥅࡛ࡁࡓࠋࡇ
ࢀ࡟ࡼࡾ㸪⾨ᫍࡢಖᏲసᴗ᫬࡟࠾࠸࡚ࡶ࢔࣋࢖
ࣛࣅࣜࢸ࢕ࢆୗࡆࡿࡇ࡜࡞ࡃ MSAS ࡢ㐠⏝ࢆ⥅⥆࡛ࡁࡓࠋ
ࡇࡢ᫬ᮇࡢ MSAS ࡣ MRS ࡀ࠶ࡿࡇ࡜࡛㟼Ṇ
⾨ᫍࡢ㌶㐨ᶆᐃ⢭ᗘࡀⰋዲ࡛࠶ࡾ㸪බᘧ࡟ ㊥ᶵ⬟ࢆᥦ౪ࡋ࡚࠸ࡓࠋࡓࡔࡋ㸪࿘㎶ᅜ࡜ࡢ࿘Ἴ
ᩘㄪᩚ࡟ࡼࡾ ࢺࣛࣥࢫ࣏ࣥࢲࡢᖏᇦᖜࡀ 2.2
MHz ࡟㝈ࡽࢀ࡚࠸ࡓࡇ࡜࠿ࡽ ㊥⢭ᗘࡣࡑࢀ࡯࡝Ⰻዲ࡛ࡣ࡞ࡃ㸪URA=6㸦16 m㸧⛬ᗘࡀタᐃ ࡉ ࢀ ࡚ ࠸ ࡓ ࠋ ᙜ ↛ ࡞ ࡀ ࡽ 㸪 PRN129 ཬ ࡧ
PRN137 ࡟ᑐࡍࡿࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ⿵ṇ᝟ሗ
ࡶ㏦ಙࡉࢀ࡚࠸ࡓࠋ
 ᪧ MSAS㸦MSAS V1㸧࣭MRS ࡞ࡋ
3.2
2005 ᖺ࡟ᡴࡕୖࡆࡽࢀࡓ MTSAT-1R ࡟ࡘ࠸࡚ࡣ㸪10 ᖺ㛫ࡢ㐠⏝ᮇ㛫ࡀ⤒㐣ࡋࡓࡇ࡜࠿ࡽ
2015 ᖺ 9 ᭶ 28 ᪥࡟౑⏝ࢆ೵Ṇࡋ㸪ྠᖺ 12 ᭶
10 ᪥࡟㐠⏝ࢆ⤊஢ࡋࡓ[7]ࠋ2 ᒁࡢ MRS ࡟ࡘ࠸࡚ࡣ㸪ࡇࢀ࡟ඛ❧ࡗ࡚ྠᖺ 3 ᭶ 30 ᪥ࢆࡶࡗ࡚
ᗫṆࡉࢀ࡚࠸ࡓࠋ
㟼Ṇ⾨ᫍࡣ 1 ᶵ࡜࡞ࡗࡓࡀ㸪MSAS ಙྕ࡟ࡘ࠸࡚ࡣ KASC ཬࡧ HASC ࡛ᘬࡁ⥆ࡁ⏕ᡂࡉࢀ㸪
MTSAT-2 ࡢࢹࣗ࢔ࣝ PRN ᶵ⬟࡟ࡼࡾࡑࢀࡒࢀ

PRN129 ཬࡧ PRN137 ࡜ࡋ࡚㏦ಙࡉࢀࡓࠋ
㊥ᶵ⬟ࡣᥦ౪ࡉࢀ࡞࠸ࡇ࡜࡜࡞ࡗࡓࡀ㸪MT 17 ࡛ࡣ ㊥ᶵ⬟ࡀ ON ࡛࠶ࡾ㸪MT 9 ࡛ࡣ
URA=14㸦4096 m㸧ࡀタᐃࡉࢀ㸪ṇᖖ࡞⾨ᫍ఩⨨ཬࡧࢡࣟࢵࢡ⿵ṇ್ࡀ㏦ಙࡉࢀ࡚࠸ࡓࠋࡇࡢ
⌮⏤ࡣඛ࡟㏙࡭ࡓ࢔ࣅ࢜ࢽࢡࢫᶵჾࡢ௙ᵝ࡟ࡼࡿࠋࡓࡔࡋ㸪PRN129 ཬࡧ PRN137 ࡟ᑐࡍࡿࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ⿵ṇ᝟ሗ࡟ࡘ࠸࡚ࡣUDREI=14 ࡀタᐃࡉࢀ㸦ࡓࡔࡋ⿵ṇ್ࡣ↓ຠ್࡛ࡣ࡞࠸㸧㸪 ㊥ᶵ⬟ࢆ฼⏝࡛ࡁ࡞࠸ࡼ࠺࡟ࡉ
ࢀ࡚࠸ࡓࠋ
3.3 ᪂ MSAS㸦MSAS V2㸧
2020 ᖺ 4 ᭶㸪MSAS ࡣ㟼Ṇ⾨ᫍཬࡧᆅୖ᪋タ ࡀ ඲ 㠃 ⓗ ࡟ ᭦ ᪂ ࡉࢀ ࡓ [6]-[9]ࠋ 㟼 Ṇ ⾨ ᫍ ࡣ
MTSAT-2 ࠿ࡽ QZS-3 ࡟ษࡾ᭰࠼ࡽࢀ㸪L1Sb ಙྕ ࢆ ౑ ⏝ ࡋ ࡚ PRN137 ࡀ ㏦ ಙ ࡉ ࢀ ࡚ ࠸ ࡿ ࠋ
GMS ࡣᅜෆ 13 ᒁ࡜࡞ࡾ㸪MCS ࡣ୺ᒁࢆᖖ㝣ኴ⏣㸪ࣂࢵࢡ࢔ࢵࣉᒁࢆᡤἑ࡟タ⨨ࡋ࡚࠸ࡿ㸦ᅗ 2㸧ࠋ
㟼Ṇ⾨ᫍࡀ QZS-3 ࡟ኚ᭦ࡉࢀࡓࡇ࡜࡟ࡼࡾ㸪
QZS-3 ࡀ ㏦ ಙ ࡍ ࡿ ௚ ࡢ ㊥ ಙ ྕ ࡜ ྠ ᵝ ࡟ 㸪
SBAS ಙྕࡶ⾨ᫍᦚ㍕࿘Ἴᩘᶆ‽࡟ࡶ࡜࡙࠸࡚
⾨ᫍෆ㒊࡛⏕ᡂࡉࢀ࡚࠸ࡿࠋࡍ࡞ࢃࡕ㸪௚ࡢࡍ
࡭࡚ࡢ SBAS ࡀ᥇⏝ࡋ࡚࠸ࡿ࣋ࣥࢺࣃ࢖ࣉࢺࣛ
ࣥࢫ࣏ࣥࢲ᪉ᘧ࡛ࡣ࡞࠸ࡇ࡜࡜࡞ࡗࡓࠋࡇࢀ࡟
ࡼࡾ࿘Ἴᩘㄪᩚୖࡢၥ㢟ࡀ⦆࿴ࡉࢀࡿࡇ࡜࠿ࡽ
ᗈ࠸ᖏᇦᖜ࡟ࡼࡿ ㊥⢭ᗘࡢᨵၿࢆᮇᚅ࡛ࡁࡿ
ࡀ㸪୍᪉࡛᏶඲ᛶࡢ☜ಖ࡟࠾ࡅࡿࣜ࢔ࣝࢱ࢖࣒
ᛂ⟅ᛶ⬟࡟ࡣὀពࡀᡶࢃࢀࡿࡇ࡜࡜࡞ࡗࡓࠋ
GMS ࡀಸቑࡋ࡚࠸ࡿ࡜ࡣ࠸࠼ᅜෆᒁࡢࡳࡢ
ᵓᡂࡢࡓࡵ㸪 ㊥ᶵ⬟࡟ࡘ࠸࡚ࡣᥦ౪ࡉࢀ࡞࠸ࠋ
඲㠃ⓗ࡞᭦᪂࡟క࠺ㅖసᴗࢆඃඛࡍࡿࡓࡵ㸪ᛶ⬟㠃࡟ࡘ࠸࡚ࡢᨵၿࡣᅗࡽࡎ㸪ᚑ๓ࡢᛶ⬟ࢆ⥔ᣢࡍࡿࡇ࡜࡜ࡉࢀࡓࠋ
฼⏝⪅࡟࡜ࡗ࡚ࡣ㸪MT 17 ࡟ PRN129 ࡟ᑐᛂ
ࡍࡿ⾨ᫍࡀ࡞ࡃ࡞ࡾ㸪ࡲࡓ MT 9 ཬࡧ MT 17 ࡢ⾨ᫍ఩⨨ࡀኚ᭦ࡉࢀ࡚࠸ࡿࠋᪧࢩࢫࢸ࣒࡜ྠᵝ࡛࠶ࡿࡀ㸪 ㊥ᶵ⬟ࡣᥦ౪ࡉࢀ࡞࠸࡜ࡣ࠸࠺ࡶ
ࡢࡢ MT 17 ࡛ࡣ ㊥ᶵ⬟ࡀ ON ࡛࠶ࡾ㸪MT 9
࡛ࡣ URA=14 ࡀタᐃࡉࢀ࡚࠸ࡿࠋࡓࡔࡋ㸪⾨ᫍ఩⨨ࡀṇᖖ࡞୍᪉࡛ࢡࣟࢵࢡ⿵ṇ್ࡣ㈇ࡢ᭱
኱್㸦-285.9 m㸧࡟タᐃࡉࢀ࡚࠾ࡾ㸪PRN137
࡟ᑐࡍࡿࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ⿵ṇ᝟ሗࡣ
UDREI=14 ཬࡧ↓ຠ್࡜࡞ࡗ࡚࠸ࡿࠋ

- 31 -

令和３年度（第２１回）電子航法研究所発表会

⾲ 6 ᛶ⬟ホ౯䛻౑⏝䛧䛯ほ
䝅䝇䝔䝮
ほ

ᮇ㛫

KP ᣦᩘ
PRN
SBAS ⾨ᫍMT 17
Ranging
MT 9
URA
MT 9
㟼Ṇ⾨ᫍ఩⨨
MT 9䜽䝻䝑䜽⿵ṇ್䝕䜱䝣䜯䝺䞁䝅䝱䝹⿵ṇ

ᅗ 1 㐠⏝㛤ጞ᫬䛾 MSAS 䛾ᵓᡂ

ཷಙᶵ
䜰䞁䝔䝘

ᅗ 2 ⌧ᅾ䛾 MSAS 䛾ᵓᡂ4
㊥ᶵ⬟ࡢᛶ⬟ホ౯
MSAS ࡟ࡘ࠸࡚ࡣ஧ᗘ࡟ࢃࡓࡾᵓᡂࡀኚ᭦ࡉ
ࢀ࡚ࡁ࡚࠸ࡿࡢ࡛㸪ࡑࢀࡒࢀࡢ᫬ᮇ࡟ࡘ࠸࡚
㊥ᶵ⬟ࡢᛶ⬟ࢆホ౯ࡋࡓࠋ࡞࠾㸪ྛ᫬ᮇ࡟㏦ಙ
ࡉࢀ࡚࠸ࡓ ㊥ᶵ⬟࡟㛵ಀࡍࡿ᝟ሗ࡜ほ ࢹ࣮ࢱࡢᴫせࢆࡲ࡜ࡵࡿ࡜㸪⾲ 6 ࡢ㏻ࡾ࡛࠶ࡿࠋほࢹ࣮ࢱࡢ࢚࣏ࢵࢡ㛫㝸ࡣ 1 ⛊࡛࠶ࡿࠋ
4.1 MT 9 ࡢసᡂ㸦MSAS V2 ࡢࡳ㸧
MSAS V2 ࡟ࡘ࠸࡚ࡣ㸪MT 9 ࡟᭷ຠ࡞ࢡࣟࢵ
ࢡ⿵ṇ್ࡀ᱁⣡ࡉࢀ࡚࠸࡞࠸ࠋࡇࢀࢆࡑࡢࡲࡲホ౯ࡋࡓ⤖ᯝࢆホ౯㸦i㸧࡜ࡍࡿࠋࢡࣟࢵࢡ⿵
ṇ್ࡀ࡞ࡃ࡚ࡶ㏦ಙಙྕࡢᏳᐃᗘࢆホ౯ࡍࡿࡇ࡜ࡣ࡛ࡁࡿࡀ㸪⌧ᐇⓗ࡟ࡣ࢚ࣇ࢙࣓ࣜࢫ᝟ሗ࡟
┦ᙜࡍࡿ᝟ሗࢆ୚࠼ࡓ࠺࠼࡛ホ౯ࢆ⾜࠸ࡓ࠸ࠋ⌧ᐇⓗ࡞ホ౯࡜ࡍࡿࡓࡵ࡟㸪ᮏ◊✲࡛ࡣ
QZS-3 ࡢ L1 C/A ಙྕ࡛㏦ಙࡉࢀࡓ⯟ἲ࣓ࢵࢭ

MSAS V1
w/o MRS2018 ᖺ 1 ᭶
10䡚12 ᪥2137
MTSAT-22021 ᖺ 1 ᭶
17䡚19 ᪥
2
137
QZS-3

ON

ON

ON

6
(16 m)

14(4096 m)

14(4096 m)

Valid

Valid

Valid

Valid

Valid

-285.9 m

MSAS V2

Valid
Valid
Invalid(UDREI<14)(UDREI=14)(UDREI=14)
NovAtel MiLLenium-STD䠄ᮾி㒔ㄪᕸᕷ䠅
NovAtelModel 600Septentrio PolaNt-x MF
L1/L2

࣮ࢪ㸦LNAV㸧ࢆ౑⏝ࡋ࡚ MT 9 ࢆసᡂࡍࡿࡇ
࡜࡜ࡋࡓࠋࡇࢀࢆホ౯㸦ii㸧࡜ࡍࡿࠋMSAS V2
࡛ࡶ MT 9 ⮬యࡣ㏦ಙࡉࢀ࡚࠸ࡿࡢ࡛㸪ほࢹ࣮ࢱࢆ᱁⣡ࡋࡓࣟࢢࣇ࢓࢖ࣝ࡟ྵࡲࢀࡿ MT
9 ࢆ᭩ࡁ᥮࠼࡚౑⏝ࡍࡿࠋලయⓗ࡟ࡣ㸪MT 9ࡢࢱ࢖࣒࢔࢘ࢺ᫬㛫ࢆ⪃៖ࡋ࡚⣙ 120 ⛊ᚋࢆ࢚࣏ࢵࢡ᫬้࡜ࡋ࡚㸪L1 C/A ಙྕࡢ LNAV ࣓ࢵࢭ࣮ࢪ࠿ࡽ⟬ฟࡋࡓ⾨ᫍ఩⨨ཬࡧ㏿ᗘ㸪ࢡࣟࢵࢡ⿵ṇ್࡜ࡑࡢኚ໬⋡ࢆ᱁⣡ࡋ┤ࡋࡓࠋ࠶ࢃࡏ
࡚ URA ࢆ 6㸦16 m㸧࡟タᐃࡋࡓࠋ
MSAS V2 ࡟ࡘ࠸࡚ࡣ㸪SBAS ⾨ᫍ࡟ᑐࡍࡿࢹ࢕ࣇ ࢓ࣞࣥࢩ ࣕࣝ⿵ ṇ ᝟ሗ࡟ࡘ࠸ ࡚ ࡣ 㸪 0㸦⿵ṇ࡞ࡋ㸧࡟タᐃࡋࡓࠋᚑࡗ࡚ࡇࡢ᪉ἲ࡟ࡼࡿホ౯⤖ᯝ࡟ࡣࣂ࢖࢔ࢫㄗᕪࡀṧࡾ㸪ࡑࢀࡣࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ⿵ṇ᝟ሗࢆ㐺ษ࡟⏕ᡂࡍࡿࡇ࡜࡛ゎỴࡉࢀࡿࡇ࡜࡟ὀពࡍࡿࠋ
4.2 ホ౯⤖ᯝࡲࡎ㸪ࡑࢀࡒࢀࡢ᫬ᮇࡢཷಙಙྕࡢ C/N0 ࢆ
ᅗ 3 ࡟♧ࡍࠋほ ᫬ᮇࡣ㟁㞳ᅪάືࡢᙳ㡪ࡀᑠࡉ࠸෤Ꮨ࡜ࡋ㸪ࡑࢀࡒࢀᆅ☢Ẽᨐ஘ࡢ⛬ᗘࢆ࠶
ࡽࢃࡍ KP ᣦᩘࡀᑠࡉ࠸ᮇ㛫ࢆ㑅ᐃࡋࡓ㸬ᮏ◊✲ࡢほ ⎔ቃ࡛ࡣ 2017 ᖺᮎ࡟ཷಙ࢔ࣥࢸࢼࡀ
ᗈᖏᇦࡢࡶࡢ࡟஺᥮ࡉࢀ࡚࠾ࡾ㸪C/N0 ࡀⱝᖸపୗࡍࡿ࡜࡜ࡶ࡟㞧㡢ࡀቑ࠼࡚࠸ࡿᵝᏊࡀࢃ࠿ࡿ㸬࠸ࡎࢀ࡟ࡋ࡚ࡶ༑ศ࡞ C/N0 ࡀ☜ಖࡉࢀ࡚࠾ࡾ㸪SBAS ಙྕࡢཷಙ࡟≉ẁࡢᨭ㞀ࡣ࡞࠸㸬ḟ࡟㸪 ㊥ಙྕࡢṧᕪࡣᅗ 4 ࡢࡼ࠺࡟ほ ࡉ- 32 -

⾲ 6 ᛶ⬟ホ౯䛻౑⏝䛧䛯ほ䝕䞊䝍

MSAS V1
w/MRS
2014 ᖺ 1 ᭶
16䡚18 ᪥2137
MTSAT-2

䝅䝇䝔䝮
ほ

ᮇ㛫

KP ᣦᩘ
PRN
SBAS ⾨ᫍMT 17
Ranging
MT 9
URA
MT 9
㟼Ṇ⾨ᫍ఩⨨
MT 9䜽䝻䝑䜽⿵ṇ್䝕䜱䝣䜯䝺䞁䝅䝱䝹⿵ṇ

ᅗ 1 㐠⏝㛤ጞ᫬䛾 MSAS 䛾ᵓᡂ

ཷಙᶵ
䜰䞁䝔䝘

ᅗ 2 ⌧ᅾ䛾 MSAS 䛾ᵓᡂ4
㊥ᶵ⬟ࡢᛶ⬟ホ౯
MSAS ࡟ࡘ࠸࡚ࡣ஧ᗘ࡟ࢃࡓࡾᵓᡂࡀኚ᭦ࡉ
ࢀ࡚ࡁ࡚࠸ࡿࡢ࡛㸪ࡑࢀࡒࢀࡢ᫬ᮇ࡟ࡘ࠸࡚
㊥ᶵ⬟ࡢᛶ⬟ࢆホ౯ࡋࡓࠋ࡞࠾㸪ྛ᫬ᮇ࡟㏦ಙ
ࡉࢀ࡚࠸ࡓ ㊥ᶵ⬟࡟㛵ಀࡍࡿ᝟ሗ࡜ほ ࢹ࣮ࢱࡢᴫせࢆࡲ࡜ࡵࡿ࡜㸪⾲ 6 ࡢ㏻ࡾ࡛࠶ࡿࠋほࢹ࣮ࢱࡢ࢚࣏ࢵࢡ㛫㝸ࡣ 1 ⛊࡛࠶ࡿࠋ
4.1 MT 9 ࡢసᡂ㸦MSAS V2 ࡢࡳ㸧
MSAS V2 ࡟ࡘ࠸࡚ࡣ㸪MT 9 ࡟᭷ຠ࡞ࢡࣟࢵ
ࢡ⿵ṇ್ࡀ᱁⣡ࡉࢀ࡚࠸࡞࠸ࠋࡇࢀࢆࡑࡢࡲࡲホ౯ࡋࡓ⤖ᯝࢆホ౯㸦i㸧࡜ࡍࡿࠋࢡࣟࢵࢡ⿵
ṇ್ࡀ࡞ࡃ࡚ࡶ㏦ಙಙྕࡢᏳᐃᗘࢆホ౯ࡍࡿࡇ࡜ࡣ࡛ࡁࡿࡀ㸪⌧ᐇⓗ࡟ࡣ࢚ࣇ࢙࣓ࣜࢫ᝟ሗ࡟
┦ᙜࡍࡿ᝟ሗࢆ୚࠼ࡓ࠺࠼࡛ホ౯ࢆ⾜࠸ࡓ࠸ࠋ⌧ᐇⓗ࡞ホ౯࡜ࡍࡿࡓࡵ࡟㸪ᮏ◊✲࡛ࡣ
QZS-3 ࡢ L1 C/A ಙྕ࡛㏦ಙࡉࢀࡓ⯟ἲ࣓ࢵࢭ䝕䞊䝍

MSAS V1
w/MRS
2014 ᖺ 1 ᭶
16䡚18 ᪥2137
MTSAT-2

MSAS V1
w/o MRS2018 ᖺ 1 ᭶
10䡚12 ᪥2137
MTSAT-22021 ᖺ 1 ᭶
17䡚19 ᪥
2
137
QZS-3

ON

ON

ON

6
(16 m)

14(4096 m)

14(4096 m)

Valid

Valid

Valid

Valid

Valid

-285.9 m

MSAS V2

Valid
Valid
Invalid(UDREI<14)(UDREI=14)(UDREI=14)
NovAtel MiLLenium-STD䠄ᮾி㒔ㄪᕸᕷ䠅
NovAtelModel 600Septentrio PolaNt-x MF
L1/L2

࣮ࢪ㸦LNAV㸧ࢆ౑⏝ࡋ࡚ MT 9 ࢆసᡂࡍࡿࡇ
࡜࡜ࡋࡓࠋࡇࢀࢆホ౯㸦ii㸧࡜ࡍࡿࠋMSAS V2
࡛ࡶ MT 9 ⮬యࡣ㏦ಙࡉࢀ࡚࠸ࡿࡢ࡛㸪ほࢹ࣮ࢱࢆ᱁⣡ࡋࡓࣟࢢࣇ࢓࢖ࣝ࡟ྵࡲࢀࡿ MT
9 ࢆ᭩ࡁ᥮࠼࡚౑⏝ࡍࡿࠋලయⓗ࡟ࡣ㸪MT 9ࡢࢱ࢖࣒࢔࢘ࢺ᫬㛫ࢆ⪃៖ࡋ࡚⣙ 120 ⛊ᚋࢆ࢚࣏ࢵࢡ᫬้࡜ࡋ࡚㸪L1 C/A ಙྕࡢ LNAV ࣓ࢵࢭ࣮ࢪ࠿ࡽ⟬ฟࡋࡓ⾨ᫍ఩⨨ཬࡧ㏿ᗘ㸪ࢡࣟࢵࢡ⿵ṇ್࡜ࡑࡢኚ໬⋡ࢆ᱁⣡ࡋ┤ࡋࡓࠋ࠶ࢃࡏ
࡚ URA ࢆ 6㸦16 m㸧࡟タᐃࡋࡓࠋ
MSAS V2 ࡟ࡘ࠸࡚ࡣ㸪SBAS ⾨ᫍ࡟ᑐࡍࡿ
ࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ⿵ṇ᝟ሗ࡟ࡘ࠸࡚ࡣ㸪0㸦⿵ṇ࡞ࡋ㸧࡟タᐃࡋࡓࠋᚑࡗ࡚ࡇࡢ᪉ἲ࡟ࡼࡿホ౯⤖ᯝ࡟ࡣࣂ࢖࢔ࢫㄗᕪࡀṧࡾ㸪ࡑࢀࡣࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ⿵ṇ᝟ሗࢆ㐺ษ࡟⏕ᡂࡍࡿࡇ࡜࡛ゎỴࡉࢀࡿࡇ࡜࡟ὀពࡍࡿࠋ
4.2 ホ౯⤖ᯝࡲࡎ㸪ࡑࢀࡒࢀࡢ᫬ᮇࡢཷಙಙྕࡢ C/N0 ࢆ
ᅗ 3 ࡟♧ࡍࠋほ ᫬ᮇࡣ㟁㞳ᅪάືࡢᙳ㡪ࡀᑠࡉ࠸෤Ꮨ࡜ࡋ㸪ࡑࢀࡒࢀᆅ☢Ẽᨐ஘ࡢ⛬ᗘࢆ࠶
ࡽࢃࡍ KP ᣦᩘࡀᑠࡉ࠸ᮇ㛫ࢆ㑅ᐃࡋࡓ㸬ᮏ◊✲ࡢほ ⎔ቃ࡛ࡣ 2017 ᖺᮎ࡟ཷಙ࢔ࣥࢸࢼࡀ
ᗈᖏᇦࡢࡶࡢ࡟஺᥮ࡉࢀ࡚࠾ࡾ㸪C/N0 ࡀⱝᖸపୗࡍࡿ࡜࡜ࡶ࡟㞧㡢ࡀቑ࠼࡚࠸ࡿᵝᏊࡀࢃ࠿ࡿ㸬࠸ࡎࢀ࡟ࡋ࡚ࡶ༑ศ࡞ C/N0 ࡀ☜ಖࡉࢀ࡚࠾ࡾ㸪SBAS ಙྕࡢཷಙ࡟≉ẁࡢᨭ㞀ࡣ࡞࠸㸬ḟ࡟㸪 ㊥ಙྕࡢṧᕪࡣᅗ 4 ࡢࡼ࠺࡟ほ ࡉ- 32 -

令和３年度（第２１回）電子航法研究所発表会

ᅗ 3 ཷಙಙྕ䛾 C/N0

ᅗ 5 ṧᕪ䛾ኚ໬⋡

ᅗ 3 ཷಙಙྕ䛾 C/N0

ᅗ 5 ṧᕪ䛾ኚ໬⋡

ᅗ6
ᅗ4㊥ಙྕ䛾ṧᕪ

ᅗ 6 ṧᕪཬ䜃ṧᕪ䛾ኚ໬⋡䛸
MT 9 䛾㏦ಙ䝍䜲䝭䞁䜾

ࢀࡓࠋ2021 ᖺࡢほ ࢹ࣮ࢱ࡟ࡘ࠸࡚ࡣ㸪ホ౯
㸦i㸧MSAS V2 ࡀ㏦ಙࡋࡓ MT 9 ࢆࡑࡢࡲࡲ౑
⏝ࡋࡓሙྜ㸦㟷㸧㸪ホ౯㸦ii㸧L1 C/A ಙྕࡢ
LNAV ࣓ࢵࢭ࣮ࢪ࡟ࡼࡾ MT 9 ࢆ෌ᵓᡂࡋ࡚౑
⏝ࡋࡓሙྜ㸦ᶳ㸧㸪ࡢ୧᪉ࢆࣉࣟࢵࢺࡋ࡚࠶ࡿࠋ
ホ౯㸦i㸧࡟ࡘ࠸࡚ࡣ㸪ࢡࣟࢵࢡ⿵ṇ್ࡢタᐃ
ࢆ㋃ࡲ࠼ 285.9 m ࢆຍ࠼࡚࠶ࡿࠋ࠸ࡎࢀࡶ࢟ࣕ
ࣜ࢔ࢫ࣒࣮ࢪࣥࢢࡣ 100 ⛊࡜ࡋࡓࠋ2014 ᖺཬࡧ 2018 ᖺࡢほ ࢹ࣮ࢱࡣఝࡓഴྥ
ࢆ♧ࡋ㸪ṧᕪࡢ RMS ್ࡣ 4 m ⛬ᗘ࡛࠶ࡗࡓࠋ
2018 ᖺࡢ࡯࠺ࡀⱝᖸࡤࡽࡘࡁࡣᑠࡉ࠸ࡼ࠺࡛
࠶ࡿࡀ㸪ཷಙ࢔ࣥࢸࢼࡢᖏᇦࡀᗈࡃ࡞ࡗ࡚࠸ࡿ
ᙳ㡪࡜ᛮࢃࢀࡿࠋMRS ࡀᗫṆࡉࢀࡓᙳ㡪ࡣ☜ㄆ࡛ࡁ࡞࠸ࡀ㸪ᛶ⬟࡟ኚ໬ࡀ࡞࠸࡜⤖ㄽࡍࡿ࡟ࡣ」ᩘᆅⅬ࡟࠾ࡅࡿホ౯⤖ᯝࢆẚ㍑ࡍࡿᚲせࡀ
࠶ࡿࠋ2021 ᖺࡢ MSAS V2 ࡟ࡘ࠸࡚ࡣホ౯

㸦i㸧࡜ホ౯㸦ii㸧࡛኱ࡁ࡞㐪࠸ࡣࡳࡽࢀࡎ㸪࠸ࡎࢀࡶ-10 m ⛬ᗘࡢࣂ࢖࢔ࢫࡀ࠶ࡿࠋࡤࡽࡘࡁᡂ ศ ࡟ ࡘ ࠸ ࡚ ࡣ 㸪 MT 9 ࢆ ෌ ᵓ ᡂ ࡋ ࡓ ホ ౯
㸦ii㸧ࡢ࡯࠺ࡀᢚ࠼ࡽࢀ࡚࠸ࡿࠋ
㊥ಙྕ࡜ࡋ࡚ࡢရ㉁ࢆࡳࡿࡓࡵ࡟㸪ṧᕪࡢኚ໬⋡㸦๓࢚࣏ࢵࢡ࡜ࡢᕪศ㸧ࢆㄪ࡭ࡓ౛ࢆᅗ
5 ࡟♧ࡍࠋࣂ࢖࢔ࢫᡂศࡀ࡞ࡃ࡞ࡗ࡚ࡤࡽࡘࡁࡀぢ࠼࡚࠾ࡾ㸪ࡑࡢഴྥࡣᅗ 4 ࡜ኚࢃࡽ࡞࠸ࠋࡍ ࡞ ࢃ ࡕ 㸪 2014 ᖺ ࡢ ほ ࢹ ࣮ ࢱ ࡜ ẚ ࡭ ࡿ ࡜
2018 ᖺࡣⱝᖸࡤࡽࡘࡁࡀᑠࡉࡃ㸪2021 ᖺࡢホ౯㸦ii㸧ࡣࡶࡗ࡜ࡶⰋዲ࡞ရ㉁ࢆ♧ࡋ࡚࠸ࡿࠋ
ホ౯㸦i㸧࡛ࡣ࿘ᮇⓗ࡟኱ࡁ࡞ኚ໬ࡀࡳࡽࢀ㸪ࢢࣛࣇࡀఱᮏ࠿࠶ࡿ࠿ࡢࡼ࠺࡟ぢ࠼࡚࠸ࡿࠋࡇ
ࡢ࿘ᮇࡣ 1 ศ㛫⛬ᗘ࡛࠶ࡿࡀ㸪୍ᐃ࡛ࡣ࡞࠸ࠋ
ࡇࡢ࿘ᮇⓗ࡞ኚ໬ࡢཎᅉࢆ☜࠿ࡵࡿࡓࡵ㸪- 33 -

ᅗ6
ᅗ4㊥ಙྕ䛾ṧᕪ

ᅗ 6 ṧᕪཬ䜃ṧᕪ䛾ኚ໬⋡䛸
MT 9 䛾㏦ಙ䝍䜲䝭䞁䜾

ࢀࡓࠋ2021 ᖺࡢほ ࢹ࣮ࢱ࡟ࡘ࠸࡚ࡣ㸪ホ౯
㸦i㸧MSAS V2 ࡀ㏦ಙࡋࡓ MT 9 ࢆࡑࡢࡲࡲ౑
⏝ࡋࡓሙྜ㸦㟷㸧㸪ホ౯㸦ii㸧L1 C/A ಙྕࡢ
LNAV ࣓ࢵࢭ࣮ࢪ࡟ࡼࡾ MT 9 ࢆ෌ᵓᡂࡋ࡚౑
⏝ࡋࡓሙྜ㸦ᶳ㸧㸪ࡢ୧᪉ࢆࣉࣟࢵࢺࡋ࡚࠶ࡿࠋ
ホ౯㸦i㸧࡟ࡘ࠸࡚ࡣ㸪ࢡࣟࢵࢡ⿵ṇ್ࡢタᐃ
ࢆ㋃ࡲ࠼ 285.9 m ࢆຍ࠼࡚࠶ࡿࠋ࠸ࡎࢀࡶ࢟ࣕ
ࣜ࢔ࢫ࣒࣮ࢪࣥࢢࡣ 100 ⛊࡜ࡋࡓࠋ2014 ᖺཬࡧ 2018 ᖺࡢほ ࢹ࣮ࢱࡣఝࡓഴྥ
ࢆ♧ࡋ㸪ṧᕪࡢ RMS ್ࡣ 4 m ⛬ᗘ࡛࠶ࡗࡓࠋ
2018 ᖺࡢ࡯࠺ࡀⱝᖸࡤࡽࡘࡁࡣᑠࡉ࠸ࡼ࠺࡛
࠶ࡿࡀ㸪ཷಙ࢔ࣥࢸࢼࡢᖏᇦࡀᗈࡃ࡞ࡗ࡚࠸ࡿ
ᙳ㡪࡜ᛮࢃࢀࡿࠋMRS ࡀᗫṆࡉࢀࡓᙳ㡪ࡣ☜ㄆ࡛ࡁ࡞࠸ࡀ㸪ᛶ⬟࡟ኚ໬ࡀ࡞࠸࡜⤖ㄽࡍࡿ࡟ࡣ」ᩘᆅⅬ࡟࠾ࡅࡿホ౯⤖ᯝࢆẚ㍑ࡍࡿᚲせࡀ
࠶ࡿࠋ2021 ᖺࡢ MSAS V2 ࡟ࡘ࠸࡚ࡣホ౯

㸦i㸧࡜ホ౯㸦ii㸧࡛኱ࡁ࡞㐪࠸ࡣࡳࡽࢀࡎ㸪࠸ࡎࢀࡶ-10 m ⛬ᗘࡢࣂ࢖࢔ࢫࡀ࠶ࡿࠋࡤࡽࡘࡁᡂ ศ ࡟ ࡘ ࠸ ࡚ ࡣ 㸪 MT 9 ࢆ ෌ ᵓ ᡂ ࡋ ࡓ ホ ౯
㸦ii㸧ࡢ࡯࠺ࡀᢚ࠼ࡽࢀ࡚࠸ࡿࠋ
㊥ಙྕ࡜ࡋ࡚ࡢရ㉁ࢆࡳࡿࡓࡵ࡟㸪ṧᕪࡢኚ໬⋡㸦๓࢚࣏ࢵࢡ࡜ࡢᕪศ㸧ࢆㄪ࡭ࡓ౛ࢆᅗ
5 ࡟♧ࡍࠋࣂ࢖࢔ࢫᡂศࡀ࡞ࡃ࡞ࡗ࡚ࡤࡽࡘࡁࡀぢ࠼࡚࠾ࡾ㸪ࡑࡢഴྥࡣᅗ 4 ࡜ኚࢃࡽ࡞࠸ࠋࡍ ࡞ ࢃ ࡕ 㸪 2014 ᖺ ࡢ ほ ࢹ ࣮ ࢱ ࡜ ẚ ࡭ ࡿ ࡜
2018 ᖺࡣⱝᖸࡤࡽࡘࡁࡀᑠࡉࡃ㸪2021 ᖺࡢホ౯㸦ii㸧ࡣࡶࡗ࡜ࡶⰋዲ࡞ရ㉁ࢆ♧ࡋ࡚࠸ࡿࠋ
ホ౯㸦i㸧࡛ࡣ࿘ᮇⓗ࡟኱ࡁ࡞ኚ໬ࡀࡳࡽࢀ㸪ࢢࣛࣇࡀఱᮏ࠿࠶ࡿ࠿ࡢࡼ࠺࡟ぢ࠼࡚࠸ࡿࠋࡇ
ࡢ࿘ᮇࡣ 1 ศ㛫⛬ᗘ࡛࠶ࡿࡀ㸪୍ᐃ࡛ࡣ࡞࠸ࠋ
ࡇࡢ࿘ᮇⓗ࡞ኚ໬ࡢཎᅉࢆ☜࠿ࡵࡿࡓࡵ㸪- 33 -

令和３年度（第２１回）電子航法研究所発表会

⾲7㊥⢭ᗘ䛾ホ౯

䝅䝇䝔䝮
MSAS V1䠄MRS 䛒䜚䠅
MSAS V1䠄MRS 䛺䛧䠅
MSAS V2䠄䝕䜱䝣䜯䝺䞁䝅䝱䝹⿵ṇ䛺䛧)
MSAS V2䠄䝕䜱䝣䜯䝺䞁䝅䝱䝹⿵ṇ䛺䛧䠈
MT 9 䜢෌ᵓᡂ䠅ࡣ㸪SBAS ⾨ᫍࡢ఩⨨᝟ሗࢆྵࡴ MT 9 ࡢ⏕ᡂ᪉ᘧࡢ௙ᵝ࡟ࡼࡾᨃఝ㊥㞳ṧᕪ࡟ࢫࢸࢵࣉ≧ࡢኚ໬ࡀࡳࡽࢀࡿ㸪㸦iv㸧MSAS V2 ࡛ࡣᨃఝ㊥㞳ṧᕪࡢኚ໬ࡀᑠࡉࡃ㸪SBAS ಙྕ࡜ࡋ࡚ࡢရ㉁ࡣⰋዲ࡛࠶ࡿࡇ࡜ࡀ♧၀ࡉࢀࡿࠋMSAS V2 ࡛ࡣ‽ኳ㡬⾨ᫍ 3 ྕᶵ㸦QZS-3㸧ࢆ౑⏝ࡋ࡚࠸ࡿࡇ࡜࡛ SBAS ಙྕࡢရ㉁ࡀᨵၿࡋ࡚࠸ࡿࡶࡢ࡜
ᛮࢃࢀࡿࡀ㸪ࡇࢀࢆ ㊥ᛶ⬟࡟཯ᫎࡍࡿ࡟ࡣ࢚
ࣇ࢙࣓ࣜࢫ᝟ሗࢆ㏦ಙࡍࡿ MT 9 ࣓ࢵࢭ࣮ࢪࡢ
⏕ᡂ᪉ᘧࢆᨵࡵࡿᚲせࡀ࠶ࡿࠋ

ᶆ‽೫ᕪ
ṧᕪ䛾ኚ໬
ṧᕪ [m]⋡ [m/s]
2.35

0.302

2.54

0.208

2.94

0.291

2.45

0.0272

MSAS V2 ࡢホ౯㸦i㸧࡟ࡘ࠸࡚ᅗ 4 ཬࡧᅗ 5 ࡢ୍㒊ࢆᣑ኱ࡋ㸪MT 9 ࢆཷಙࡋࡓࢱ࢖࣑ࣥࢢ
㸦㉥⥺㸧ࢆ㔜ࡡࡿ࡜㸪ᅗ 6 ࡢࡼ࠺࡛࠶ࡗࡓࠋ኱
ࡁ࡞ኚ໬ࢆ⏕ࡌࡿࡢࡣ MT 9 ࡀ᭦᪂ࡉࢀࡿࢱ࢖
࣑ࣥࢢ࡛࠶ࡾ㸪๓ᚋࡢ MT 9 ྠኈ࡛ࢫࢸࢵࣉ≧ࡢᕪ␗ࡀ࠶ࡿࡇ࡜ࡀࢃ࠿ࡿࠋ⌧ᅾࡢ MSAS V2
࡟࠾࠸࡚ࡣ ㊥ᶵ⬟࡟ࡘ࠸࡚༑ศ࡞ᛶ⬟ࢆࡶࡗ࡚ᥦ౪ࡍࡿពᅗࡣ࡞ࡃ㸪┦஫┦㛵ࡢᑐ⟇࡜ࡋ࡚
MT 17 ࡜ࡢẚ㍑ࢆ⾜࠺࢔ࣅ࢜ࢽࢡࢫᶵჾࡢࡓࡵ
࡟ MT 9 ࢆ㏦ಙࡋ࡚࠸ࡿࡇ࡜ࡀࡇࡢᵝᏊ࠿ࡽࡶ࠺࠿ࡀ࠼ࡿࠋ
ṧᕪཬࡧࡑࡢኚ໬⋡ࡢᶆ‽೫ᕪࡣ⾲ 7 ࡢ㏻ࡾ࡛࠶ࡾ㸪ୖグࡢഴྥࢆ཯ᫎࡋ࡚࠸ࡿࠋ2021 ᖺࡢほ ࢹ࣮ࢱ࡟ࡘ࠸࡚ MT 9 ࢆ෌ᵓᡂࡋ࡚౑⏝ࡋ ࡓ ⤖ ᯝ ࠿ ࡽ ࡣ MSAS V2 ࡀ ㏦ ಙ ࡋ ࡚ ࠸ ࡿ
SBAS ಙྕࡢရ㉁ࡀⰋዲ࡛࠶ࡿࡇ࡜ࡀ♧၀ࡉࢀࡿࡀ㸪ࡇࢀࢆ ㊥ᛶ⬟࡟཯ᫎࡍࡿ࡟ࡣ MT 9 ࡢ⏕ᡂ᪉ᘧࢆᨵࡵࡿᚲせࡀ࠶ࡿࠋ ࡴࡍࡧ5㊥ᶵ⬟࡟㛵㐃ࡍࡿ᝟ሗࢆ୰ᚰ࡜ࡋ࡚㐠⏝㛤ጞ௨᮶ࡢ MSAS ࡢࢩࢫࢸ࣒ᵓᡂࢆᩚ⌮ࡍࡿ࡜࡜ࡶ࡟㸪᪂ᪧࡢ MSAS ࡟ࡘ࠸࡚ ㊥ᛶ⬟ࢆㄪᰝࡋࡓ⤖ᯝࢆሗ࿌ࡋࡓࠋ
2014 ᖺ㸪2018 ᖺ㸪ཬࡧ 2021 ᖺࡢほ ࢹ࣮ࢱ࠿ࡽᚓࡽࢀࡓ▱ぢࡣḟࡢ㏻ࡾ࡛࠶ࡿ㸸㸦i㸧㟼Ṇ⾨ᫍ MTSAT ࢆ౑⏝ࡋ࡚࠸ࡓ MSAS V1 ࡛ࡣ㊥⢭ᗘࡣ 4 m RMS ⛬ᗘ࡛࠶ࡾ㸪ᶆᐃᒁ MRS ࡢ᭷↓࡟ࡼࡿ ㊥ᛶ⬟ࡢᕪࡣ☜ㄆ࡛ࡁ࡞࠿ࡗࡓ㸪
㸦ii㸧⌧⾜ࡢ MSAS V2 ࡛ࡣ ㊥ᶵ⬟ࡣබᘧ࡟ࡣᥦ౪ࡉࢀ࡚࠸࡞࠸ࡀ㸪ࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ⿵
ṇ᝟ሗࢆ᏶඲࡟㐺⏝ࡏࡎ࡜ࡶᶆ‽೫ᕪ 3 m ⛬ᗘࡢ ㊥⢭ᗘࢆᮇᚅ࡛ࡁࡿ㸪㸦iii㸧MSAS V2 ࡛ཧ⪃ᩥ⊩
[1] International Standards and Recommended
Practices, Annex 10 to the Convention on Civil
Aviation: Aeronautical Telecommunications,Vol. I: Radio Navigation Aids, 6th Ed., July
2006.
[2] Minimum Operational Performance Standards
for Global Posi-tioning System/Wide Area
Augmentation System Airborne Equipment,
RTCA, DO-229, Rev. F, June 2020.
[3] ┿㘠ⱥグ㸪㐠㍺ከ┠ⓗ⾨ᫍ⏝⯟ἲ⿵ᙉࢩࢫ
ࢸ࣒㸦MSAS㸧ࡢ౪⏝㛤ጞ㸪GPS/GNSS ࢩ࣏ࣥࢪ࣒࢘㸪 pp. 35-39㸪ᮾி㸪Nov. 2007.
[4] ᮏ⏣♸⨾Ꮚ㸪⯟✵⾨ᫍࢭࣥࢱ࣮࡜ MSAS 㐠⏝ᴗົࡢ⤂௓㸪GPS/GNSS ࢩ࣏ࣥࢪ࣒࢘㸪
pp. 41-45㸪ᮾி㸪Nov. 2007.
[5] 㯞⏕㈗ᗈ㸪MSAS ࡢ㐠⏝≧ἣ࡜ᆅẆኚື࡬
ࡢᑐᛂ㸪GPS/GNSS ࢩ࣏ࣥࢪ࣒࢘㸪pp. 2126㸪ᮾி㸪Nov. 2011.
[6] ᆏ஭୔Ὀ㸪ᅜ㝿ᶆ‽⿵ᙉࢩࢫࢸ࣒ SBAS ࡢ⌧ἣ㸪GPS/GNSS ࢩ࣏ࣥࢪ࣒࢘㸪pp. 154162㸪ᮾி㸪Oct. 2020.
[7] ⏣௦ⱥ᫂㸪QZSS ࢆ฼⏝ࡋࡓ SBAS ࢧ࣮ࣅࢫ㸪GPS/GNSS ࢩ࣏ࣥࢪ࣒࢘㸪 pp. 58-63㸪
ᮾி㸪Oct. 2016.
[8] ൤ᐆṇᚿ㸪ḟᮇ MSAS ࡢᩚഛ≧ἣ࡟ࡘ࠸࡚㸪⯟ ✵ ↓ ⥺ 㸪 No. 94 㸪 pp. 13-19 㸪 Winter2017.
[9] ⏣௦ⱥ᫂㸪‽ኳ㡬⾨ᫍࢩࢫࢸ࣒ࢆ౑⏝ࡋࡓ
SBAS ࡢᛶ⬟ྥୖ࡟ࡘ࠸࡚㸪⯟✵↓⥺㸪No.
95㸪pp. 22-28㸪Spring 2018.

- 34 -

⾲7㊥⢭ᗘ䛾ホ౯

䝅䝇䝔䝮
MSAS V1䠄MRS 䛒䜚䠅
MSAS V1䠄MRS 䛺䛧䠅
MSAS V2䠄䝕䜱䝣䜯䝺䞁䝅䝱䝹⿵ṇ䛺䛧)
MSAS V2䠄䝕䜱䝣䜯䝺䞁䝅䝱䝹⿵ṇ䛺䛧䠈
MT 9 䜢෌ᵓᡂ䠅ࡣ㸪SBAS ⾨ᫍࡢ఩⨨᝟ሗࢆྵࡴ MT 9 ࡢ⏕ᡂ᪉ᘧࡢ௙ᵝ࡟ࡼࡾᨃఝ㊥㞳ṧᕪ࡟ࢫࢸࢵࣉ≧ࡢኚ໬ࡀࡳࡽࢀࡿ㸪㸦iv㸧MSAS V2 ࡛ࡣᨃఝ㊥㞳ṧᕪࡢኚ໬ࡀᑠࡉࡃ㸪SBAS ಙྕ࡜ࡋ࡚ࡢရ㉁ࡣⰋዲ࡛࠶ࡿࡇ࡜ࡀ♧၀ࡉࢀࡿࠋMSAS V2 ࡛ࡣ‽ኳ㡬⾨ᫍ 3 ྕᶵ㸦QZS-3㸧ࢆ౑⏝ࡋ࡚࠸ࡿࡇ࡜࡛ SBAS ಙྕࡢရ㉁ࡀᨵၿࡋ࡚࠸ࡿࡶࡢ࡜
ᛮࢃࢀࡿࡀ㸪ࡇࢀࢆ ㊥ᛶ⬟࡟཯ᫎࡍࡿ࡟ࡣ࢚
ࣇ࢙࣓ࣜࢫ᝟ሗࢆ㏦ಙࡍࡿ MT 9 ࣓ࢵࢭ࣮ࢪࡢ
⏕ᡂ᪉ᘧࢆᨵࡵࡿᚲせࡀ࠶ࡿࠋ

ᶆ‽೫ᕪ
ṧᕪ䛾ኚ໬
ṧᕪ [m]⋡ [m/s]
2.35

0.302

2.54

0.208

2.94

0.291

2.45

0.0272

MSAS V2 ࡢホ౯㸦i㸧࡟ࡘ࠸࡚ᅗ 4 ཬࡧᅗ 5 ࡢ୍㒊ࢆᣑ኱ࡋ㸪MT 9 ࢆཷಙࡋࡓࢱ࢖࣑ࣥࢢ
㸦㉥⥺㸧ࢆ㔜ࡡࡿ࡜㸪ᅗ 6 ࡢࡼ࠺࡛࠶ࡗࡓࠋ኱
ࡁ࡞ኚ໬ࢆ⏕ࡌࡿࡢࡣ MT 9 ࡀ᭦᪂ࡉࢀࡿࢱ࢖
࣑ࣥࢢ࡛࠶ࡾ㸪๓ᚋࡢ MT 9 ྠኈ࡛ࢫࢸࢵࣉ≧ࡢᕪ␗ࡀ࠶ࡿࡇ࡜ࡀࢃ࠿ࡿࠋ⌧ᅾࡢ MSAS V2
࡟࠾࠸࡚ࡣ ㊥ᶵ⬟࡟ࡘ࠸࡚༑ศ࡞ᛶ⬟ࢆࡶࡗ࡚ᥦ౪ࡍࡿពᅗࡣ࡞ࡃ㸪┦஫┦㛵ࡢᑐ⟇࡜ࡋ࡚
MT 17 ࡜ࡢẚ㍑ࢆ⾜࠺࢔ࣅ࢜ࢽࢡࢫᶵჾࡢࡓࡵ
࡟ MT 9 ࢆ㏦ಙࡋ࡚࠸ࡿࡇ࡜ࡀࡇࡢᵝᏊ࠿ࡽࡶ࠺࠿ࡀ࠼ࡿࠋ
ṧᕪཬࡧࡑࡢኚ໬⋡ࡢᶆ‽೫ᕪࡣ⾲ 7 ࡢ㏻ࡾ࡛࠶ࡾ㸪ୖグࡢഴྥࢆ཯ᫎࡋ࡚࠸ࡿࠋ2021 ᖺࡢほ ࢹ࣮ࢱ࡟ࡘ࠸࡚ MT 9 ࢆ෌ᵓᡂࡋ࡚౑⏝ࡋ ࡓ ⤖ ᯝ ࠿ ࡽ ࡣ MSAS V2 ࡀ ㏦ ಙ ࡋ ࡚ ࠸ ࡿ
SBAS ಙྕࡢရ㉁ࡀⰋዲ࡛࠶ࡿࡇ࡜ࡀ♧၀ࡉࢀࡿࡀ㸪ࡇࢀࢆ ㊥ᛶ⬟࡟཯ᫎࡍࡿ࡟ࡣ MT 9 ࡢ⏕ᡂ᪉ᘧࢆᨵࡵࡿᚲせࡀ࠶ࡿࠋ ࡴࡍࡧ5㊥ᶵ⬟࡟㛵㐃ࡍࡿ᝟ሗࢆ୰ᚰ࡜ࡋ࡚㐠⏝㛤ጞ௨᮶ࡢ MSAS ࡢࢩࢫࢸ࣒ᵓᡂࢆᩚ⌮ࡍࡿ࡜࡜ࡶ࡟㸪᪂ᪧࡢ MSAS ࡟ࡘ࠸࡚ ㊥ᛶ⬟ࢆㄪᰝࡋࡓ⤖ᯝࢆሗ࿌ࡋࡓࠋ
2014 ᖺ㸪2018 ᖺ㸪ཬࡧ 2021 ᖺࡢほ ࢹ࣮ࢱ࠿ࡽᚓࡽࢀࡓ▱ぢࡣḟࡢ㏻ࡾ࡛࠶ࡿ㸸㸦i㸧㟼Ṇ⾨ᫍ MTSAT ࢆ౑⏝ࡋ࡚࠸ࡓ MSAS V1 ࡛ࡣ㊥⢭ᗘࡣ 4 m RMS ⛬ᗘ࡛࠶ࡾ㸪ᶆᐃᒁ MRS ࡢ᭷↓࡟ࡼࡿ ㊥ᛶ⬟ࡢᕪࡣ☜ㄆ࡛ࡁ࡞࠿ࡗࡓ㸪
㸦ii㸧⌧⾜ࡢ MSAS V2 ࡛ࡣ ㊥ᶵ⬟ࡣබᘧ࡟ࡣᥦ౪ࡉࢀ࡚࠸࡞࠸ࡀ㸪ࢹ࢕ࣇ࢓ࣞࣥࢩࣕࣝ⿵
ṇ᝟ሗࢆ᏶඲࡟㐺⏝ࡏࡎ࡜ࡶᶆ‽೫ᕪ 3 m ⛬ᗘࡢ ㊥⢭ᗘࢆᮇᚅ࡛ࡁࡿ㸪㸦iii㸧MSAS V2 ࡛ཧ⪃ᩥ⊩
[1] International Standards and Recommended
Practices, Annex 10 to the Convention on Civil
Aviation: Aeronautical Telecommunications,Vol. I: Radio Navigation Aids, 6th Ed., July
2006.
[2] Minimum Operational Performance Standards
for Global Posi-tioning System/Wide Area
Augmentation System Airborne Equipment,
RTCA, DO-229, Rev. F, June 2020.
[3] ┿㘠ⱥグ㸪㐠㍺ከ┠ⓗ⾨ᫍ⏝⯟ἲ⿵ᙉࢩࢫ
ࢸ࣒㸦MSAS㸧ࡢ౪⏝㛤ጞ㸪GPS/GNSS ࢩ࣏ࣥࢪ࣒࢘㸪 pp. 35-39㸪ᮾி㸪Nov. 2007.
[4] ᮏ⏣♸⨾Ꮚ㸪⯟✵⾨ᫍࢭࣥࢱ࣮࡜ MSAS 㐠⏝ᴗົࡢ⤂௓㸪GPS/GNSS ࢩ࣏ࣥࢪ࣒࢘㸪
pp. 41-45㸪ᮾி㸪Nov. 2007.
[5] 㯞⏕㈗ᗈ㸪MSAS ࡢ㐠⏝≧ἣ࡜ᆅẆኚື࡬
ࡢᑐᛂ㸪GPS/GNSS ࢩ࣏ࣥࢪ࣒࢘㸪pp. 2126㸪ᮾி㸪Nov. 2011.
[6] ᆏ஭୔Ὀ㸪ᅜ㝿ᶆ‽⿵ᙉࢩࢫࢸ࣒ SBAS ࡢ⌧ἣ㸪GPS/GNSS ࢩ࣏ࣥࢪ࣒࢘㸪pp. 154162㸪ᮾி㸪Oct. 2020.
[7] ⏣௦ⱥ᫂㸪QZSS ࢆ฼⏝ࡋࡓ SBAS ࢧ࣮ࣅࢫ㸪GPS/GNSS ࢩ࣏ࣥࢪ࣒࢘㸪 pp. 58-63㸪
ᮾி㸪Oct. 2016.
[8] ൤ᐆṇᚿ㸪ḟᮇ MSAS ࡢᩚഛ≧ἣ࡟ࡘ࠸࡚㸪⯟ ✵ ↓ ⥺ 㸪 No. 94 㸪 pp. 13-19 㸪 Winter2017.
[9] ⏣௦ⱥ᫂㸪‽ኳ㡬⾨ᫍࢩࢫࢸ࣒ࢆ౑⏝ࡋࡓ
SBAS ࡢᛶ⬟ྥୖ࡟ࡘ࠸࡚㸪⯟✵↓⥺㸪No.
95㸪pp. 22-28㸪Spring 2018.

- 34 -