Presentation	2004/2/20 Collision Avoidance of quasi-zenith satellites with orbit intersection Kazuhiro KIMURA,
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Abstract(in Japanese)	(See Japanese page)
Abstract(in English)	A quasi-zenith satellite constellation with orbit intersections around hand-over points is convenient for satellite communications services to a terminal with a narrow-beam tracking antenna. However, the constellation has satellite collision hazards at the intersection. Collision avoidance is one of the most important restrictions on the satellite constellation design and orbit keeping operations. Two parameters, that is, the longitudinal separation of crossing satellites at an arbitrary time around the crossing and the deviation of the satellite altitude from the nominal value when the satellite crosses the nominal latitude of the intersection, are useful parameters for collision avoidance.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	Quasi-zenith satellite system / orbit intersection / hand-over / satellite collision / orbit keeping
Paper #	SANE2003-112,SAT2003-210
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Conference Information
Committee	SAT
Conference Date	2004/2/20(1days)
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Paper Information
Registration To	Satellite Telecommunications (SAT)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Collision Avoidance of quasi-zenith satellites with orbit intersection
Sub Title (in English)
Keyword(1)	Quasi-zenith satellite system
Keyword(2)	orbit intersection
Keyword(3)	hand-over
Keyword(4)	satellite collision
Keyword(5)	orbit keeping
1st Author's Name	Kazuhiro KIMURA
1st Author's Affiliation	Communications Research Laboratory()
Date	2004/2/20
Paper #	SANE2003-112,SAT2003-210
Volume (vol)	vol.103
Number (no)	671
Page	pp.pp.-
#Pages	6
Date of Issue