Thesis - Leigh Moody.pdf - Bad Request - Cranfield University

Appendix B / Frames of Reference
_ _
X C
m
X E
E
ΨC 15.7 Missile LOS Frame
t
ωe = 15.041 deg/hr
w
f
d
e
15-6
Z E Z C
,
Y A
GREENWICH MERIDIAN
PLANE
q
r
µ ro
q
EQUATORIAL
PLANE
d
o
λ ro
Figure 15-3 : Alignment and Earth Fixed Frames
Z A Z G
The Missile LOS frame (M) shown in Figure 15-4 is located at point (o),
coincident with the launcher and ground radar reference position. X M is the
LOS from (o) through point (m). Z M points upwards and is normal to the
plane spanned by X M and Z A . Y M remains parallel to the plane spanned by
X A and Y A .
15.8 Missile Body Frame
The Missile Body frame (B) shown in Figure 15-4 is fixed in the missile at
point (m). X B points forward along the missile’s longitudinal centre-line, Y M
right and Z M downwards when the missile is flying straight and level.
15.9 Missile Velocity Frame
The Missile Velocity frame (MV) is located at point (m) and is rotated
through YP angles with respect to the Missile Body frame such that X MV
points along the missile velocity vector. When X B and X MV are aligned
when the missile flies straight and level.
m
X A