TM 5-1250-206-12
Section III.
PRINCIPLES OF OPERATION
1-12.
FUNCTIONAL DESCRIPTION - F i g u r e 1-10 is a functional block dia-
gram of the APPS. The operator mounts the photography on the OMS photo
plates and inserts the associated PPDB cartridge into the Calculator.
T h e TID provides back-light for the photography.
The operator moves the
p h o t o - c a r r i a g e t o l o c a t e t h e d e s i r e d f e a t u r e i n t h e s t e r e o o p t i c s . This
movement provides X- a n d Y-position data to the DAC, as indicated by the
D i g i t a l D i s p l a y r e a d - o u t . T o measure the height of the feature, the
operator adjusts the right photo plate to produce a 3-dimensional
i m a g e . This movement provides
elevation data to the DAC.
W h e n the operator has measured the feature, he transfers this
d a t a from the DAC to the Calculator.
T h i s is done by pressing the DIC
pushbutton or footpedal switches. The sonalert sounds to indicate that
t h e transfer command has been received.
T h e Calculator performs as
programmed by the data base.
T h e computed point-position data is then
p r i n t e d out on paper tape or r e c o r d e d o n a t a p e c a r t r i d g e .
F i g u r e 1-10.
APPS Functional Block Diagram
1-14
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