Symposium on unidentified flying objects: hearings before the Committee on Science and Astronautics, U.S. House of Representatives, Ninetieth Congress, second session, July 29, 1968.

178
FRACTION
OF MAXIMUM
DIAMETER
10
0.8
0.6
04
02
0
0
nm
12
10
08
ArimPioie
"
11
2
3
4
5
6
7
TIME
SECONDS
8
9
10
12
ti
WU
_
1
III.
11
lit
il
Till
ni
,
I
,A.
,I
in
k
lui
/
I
r
l
i
n
ig
a
r
i
n
n
u
fl
i
.
4
„„„
I.
.1.ioni
u
1
I
Mi
l
I
,
1 1
2
3
4
5
6
7
TIME
SECONDS
FIG.
1.
Ratio
of
time
varying value to
maximum
value
of
the
angular
diameters of
the
images
of
UFO
#1
and
UFO
#2.
is
-4'
3
06
04
0.2
0
porTE?
AR/CCM/VT
F
cr
,
0
,
5
ifo
-/*
I
I
;;CA'A.
to
"
Toe
0
,
GRR/A
,
ELEVATOR
8
9
10
MAME
NUM8ERS
rOg
Uf0
d'
i
.0
0
..
...
Z.."
.
/...•
.
,.../...../...../
......
..
•
„
\
/40
/So
/40
/30
0
.
o
f:::
0#2
,,,,
GRAIN
t
-
L1107.
CONLPETE
N
1POs/ERwiRE5
r4
.
.
.
.
•
•
.
.
.
MK
,
-
7ell
‘,
,
,
\\,
P
AV
0
Al
iall
12
LocArioN5
,
DINT/FIED
rfr1,.
ARE
REFEREIVCR
'04
iccwoco
...A
-
AV
-41..41w,
TRAVEL
OF
UNIDENTIFIED
FLYING
0f5JECT5
(MONTANA
FILM)
Fm.
2.
Motion
of
unidentified
flying
objects
relative
to foreground.
In
Figs.
3a and 3b
the dotted
lines
represent
what
would be
the
locus of
the
data
points
if
the
objects
remained the
same
linear
distance
apart
and
moved
linearly
in
a
horizontal plane.
The
headings,
A,
of 169°
to 177°
are
exhibited. All of
the
data
seems
to
be
con-
sistent
with
the
foregoing
assumptions
and
with
a
head-
ing of 171°.
Of
course,
one cannot
absolutely
rule
out
some
otherother
curvilinear
motion
of
the
objects.
However,
any
such motion would
necessitate
the
coincidence
of
azimuth,
altitude,
and
separation,
all
varying
propor-
tionally
in
some
very
peculiar
fashion
to
a
tolerance
of
1%.
Figure
4
is
a
map
of
Great
Falls,
Montana, and
includes
overlays of the
UFO
system's
motion at
various
hypothetical
distances.
(No
absolute determination of