元となった辞書の項目
bi-elliptic transfer
名詞
(astronautics)
A
type
of
movement
of
a
spacecraft
from
one
orbit
to
another,
in
which
the
spacecraft
first
raises
its
apoapsis
to
an
extremely
high
altitude,
then,
at
the
new,
higher,
apoapsis,
performs
an
engine
burn
to
change
its
periapsis
to
that
of
the
desired
orbit,
and,
finally,
upon
reaching
the
new
periapsis,
performs
a
third
burn
to
lower
the
eccentricity
of
its
orbit
and
circularize
in
the
desired
orbit,
or
performs
these
steps
in
reverse
to
move
from
a
higher
to
a
lower
orbit.
日本語の意味
（宇宙船の軌道操作の一手法）軌道間移行のため、まず軌道の遠地点（apoapsis）を極端に高くし、その後、新たな遠地点でエンジン燃焼を行って望む軌道の近地点（periapsis）に合わせ、最終的に近地点で再度燃焼して軌道の離心率を下げ、円軌道に整える（または逆の手順で）方法
意味（1）
(astronautics)
A
type
of
movement
of
a
spacecraft
from
one
orbit
to
another,
in
which
the
spacecraft
first
raises
its
apoapsis
to
an
extremely
high
altitude,
then,
at
the
new,
higher,
apoapsis,
performs
an
engine
burn
to
change
its
periapsis
to
that
of
the
desired
orbit,
and,
finally,
upon
reaching
the
new
periapsis,
performs
a
third
burn
to
lower
the
eccentricity
of
its
orbit
and
circularize
in
the
desired
orbit,
or
performs
these
steps
in
reverse
to
move
from
a
higher
to
a
lower
orbit.
（ plural ）
