UAP Reported at Sandia Base, 1948-1950

Text

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

To :
Lt . Colonel Doyle Rees - PaGe 3
Subj:
Anomalous Luminous Phenomena (Seventh Report)
May 23 , 1950
to move horizontally .
However , a strictly vertical infall is a l so very
rarely observed in the case of gem~ine meteor fal ls .
3.
An analysis just completed of the t ime distribution of the s r een
fireballs so far observed permits us to add an 11th item to the list of
differences given in paragraph 1 above .
The graph of frequency versus
local time which accompanies the present r eport s11m-:s t hat the ma;cirn,un
frequency of sighting of green fireballs ( occurring at approxina-cely
2030) coincides in time v1i th neither the f r equency maxir.1um for ordinary
meteors (occurrin;; at approximately 0300) nor the frequency mazimtun for
meteorite falls (occurring at approximately 1600) .
4 .
Inspection of the graph referred to in pa.rB.gr aph 3 also will
show that most of the green fireballs have been siEhted in a t i me i nter­
val e:;...-tending from about 5 p .m. to 11 p .m. (:MST) .
This conceutr ation
might be even more pronounced if it were possible to screen -:>ut of the
secondary max:iJnum, around 2 a .m. ( :r.£T), all ordinary meteors wl:ich have
been mistakenly identified as green fireballs .
rnat such misj_de::i.tifica.­
tion has occurred is strongly suggested by the near coincidence in time
of the secondary maxi :'lum of the green fireballs and the well oste.blished
early morninG maximum of the ordinarJ meteors .
5.
Some significance may attach to the fact that tho timo i nterval
alluded to in paragraph 4 extends f rom about 7 a .m. to 1 p .m. in the Ural
r egion of t he USSR.
Since missiles movine; Y1ith velocitie s of tho or der
of those found for the green fireballs for which r eal path determinations
have been possible would travel from the southern Urals to new Mexico in
less than 15 minute s , a possible inter pretation of tho concentration of
sightings r eferred to in paragraph 4 is tho.t the z r een fireballs r esult
from guided missiles launched from bases in the Urals i n the r.-.ornin~
hours before cloudiness due to convection or blinding afternoon dust
storms can interfere with non- radar tracking , such as has been used by
the Optical Trajector.1 Section at Tlhitc Sands Proving Ground .
6 .
There is also a pronounced concentt"ation of green fireball
incidents on the four days , Friday , Saturday, Sundny , Monday , almost
a l l of the most widely observed incidents having occurre d on Saturday
or Sunday.
7.
It is a curious and fairly well- established fact that there
has been a distinct decline in the numbor of green fireball sightins s
during the last two months, within whicn. the number of so- called
11f ly­
ing saucer11 incidents in this region :,as attained an all- time high .
8.
Although I have r ecently r eceived from Dr . Joseph Ira.plan of the
Scientific Advisory Board a letter containing the statement "l'rankly ,
don ' t lm01·1 of any U. s. experiments that v1ould result in the appeart'.ncc
of these unconventional objects , and neither docs Von Karma.n
11 •
I still
NW 91526
I