Presentation	2003/3/19 On the Long-term Transition of the Aircraft Passing Frequency for Oceanic Routes Osamu Amai,
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Abstract(in English)	The safety of the North Pacific route system has been evaluated using a collision risk model. Passing frequency is one of the important parameters of the collision risk model. The passing frequency is the expected frequency of overlapping event in the longitudinal direction. It varies with route structure, the number of flight and so on. In this paper, monthly lateral and vertical passing frequency values for the North Pacific routes are calculated using flight plan data of seven years and long-term transition are investigated. One result obtained shows that the passing frequency values under the implementation of a reduced vertical separation minimum do neither increase nor decrease remarkably.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	Air Traffic Control / Safety / Passing Frequency / Collision Risk
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Conference Information
Committee	SSS
Conference Date	2003/3/19(1days)
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Paper Information
Registration To	Safety (SSS)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	On the Long-term Transition of the Aircraft Passing Frequency for Oceanic Routes
Sub Title (in English)
Keyword(1)	Air Traffic Control
Keyword(2)	Safety
Keyword(3)	Passing Frequency
Keyword(4)	Collision Risk
1st Author's Name	Osamu Amai
1st Author's Affiliation	Electronic Navigation Research Institute, Independent Administrative Institution()
Date	2003/3/19
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Volume (vol)	vol.102
Number (no)	740
Page	pp.pp.-
#Pages	4
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