GECLASSISTED PER por
i
2 DATED JULY, 15, 1994
04
Pry
: 4NTON SINISGALLI TO
DIANE S. NIXON
FLY
The primary horizontal control network furnished the basio controls
rod ale on
Pacific Southwest Region
a
poe ue
uced fromthe Aoldings of the National
Archives
from which the relations of test structures were determined.
The scheme
was expanded to include the photo stations at sites M, N, P and Q; C, E and
V Zero points, and the islands of Bogon and Rigili.
The islands of Muzin
and Aaraanbiru were located from controls established in the local Zero areas.
General Features
The specifications and criteria for second order triangulation were
followed in expanding the scheme.
While the strength of figure was weak in
some cases, additional observations were taken which offset the weakness.
All observations were made at night, and standard procedure was attempted
throughout.
Weather conditions and interference from construction and soten-
tific work in the tower areas affected the survey, but the results are
oonsidered consistent with requirements.
ih?
eae egteae
A quedrilateral was developed including station Bokon, thereby increasing
the strength of this station over the single triangle by which it was previously
located.
The adjusted values vary slightly from those recorded from the
previous survey.
Station Islet was also strengthened by inclusion in a quadrilateral with
no change in the values previously recorded.
The location of station Rigili is to third order accuracy, which conforms
with instructions regarding location of this station.
Field Computations
Computations of the expanded scheme were made at the jobsite.
While
adjustments to balanoe out observing errors were not made, the results were
within scientifio requirements.
“GRACIAS
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