Project Blue Book File on Tremonton Film, Utah, 1952

Text

This text came with the file. It may have mistakes. When the text and the image disagree, the image is right.

.. .
•
Appendix II
Plotting e Set of Flight Pats from Single rame Position Plots, with no Reference
Points
1. In a case liKe this, it would be highly desirable if t e ovement of
these objects could be recoro.ed with a stationary motion picture camera. Position
plots could be s~r· 2ose by observing proper registery of frame edges to in­
dicate the speed an direction of object flight paths.
2. However, it apparently was necessary in this case to follow the form­
ation of objec~s , to keep them all in view.
Therefore no position guide for
registering the position plots is available , since no fixed points appear in the
sky.
Other ~rinciules must be used instead.
3. It is stated that the general drift of the entire formation was to the
west . A later secuence shows a siDFle object,
hich bad reversed course, moving
from left to right in the camera 1svi.ew. It can therefore be suouosed that ulotted
paths should show a drift from right to left .
4. This is one guide to be used. Another is that uosition ulots should be
superimposed ~~thout any rotation, since the frames were ulotted without rotation.
This assumes that the camera was not rotted.; but merely moved in combined
horizontal and vertical motions.
5. Another general guide is that most of the objects should appe(" r to move
in smooth, cont·nuous paths.
Several plots, at least 4, snould be superimoosed
on a viewing table, and should be shifted until all or nearly all paths are smooth
and show reaso:nabJ..i uniform motion. This co _ound plot can be transferred to a
single sheet, anu further plots can be added in the same manner.
6. Figure II was prepa.red in just this ,,:ay, using the same 50 diameter en­
largement as in Figure I . It will be noted that the final positions of two
objects in the central trio are missing. They became so faint that they were lost;
no further plotting of this sequence was tried.
DECLASSIFIED Authority NND 923007