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on the "slave" comparators to the selected point on the "master” with a high 
degree of accuracy. In the tracking mode, any two of the three comparators 
performing as "slave" comparators are capable of automatically following the 
"master" comparator at a high rate of speed. Tracking accuracy is just accu 
rate enough to avoid loss in correlation. 
(5) The console is a separate unit containing all the controls and 
orientation media capable of selecting comparator drives, "master" and "slave" 
comparators, and fine and rough correlation; of recording coordinate and point 
identification data; of carrying out optical image rotation, raster shrinkage, 
gain control, counter resetting, film advancement, and other allied tasks. 
(6) A point location display is provided for each comparator to hold 
a print of the input material and a pointer to show the image area being scanned. 
A point numbering device is used to put identification numbers on the photo print 
at the position of each marked point. 
(7) A stereoviewer is available to allow the operator to view stereo- 
scopically any two of the three scanned areas and to select conjugate image points. 
Reference marks are provided in both the electronic circuitry and in the stereo- 
viewer to permit the measurement of grid line intersections and photo images. A 
field of view, adequate to cover the scanning raster, is provided in conjunction 
with several reduction lens systems. 
(8) A photo record system is provided to record automatically on 
35 mm film marked points and identification numbers. 
(9) The ability to record measurements of any or all three compara 
tors and "read-in" of predetermined coordinate positions to any or all compara 
tors is provided. "Read-out" recording may be made on a typewriter hard copy 
or on punched cards; "read-in” data are in the form of punched cards (one 
coordinate point per card). 
(10) The automatic point transfer instrument is designed to operate in 
a controlled environment (temperature, humidity, and dust) to insure effective 
operations commensurate with its precision. 
b. A High Resolution Orthophoto Output Table (HROOT) has been developed 
to be used as a component part of the UNAMACE equipment. The present tables 
(four in number) of the UNAMACE are optionally capable of scanning diapositives 
as input or printing on film sheets as output. The new table (HROOT) will replace 
one of the four existing tables--its use will result in a significant increase in out 
put size and printing resolution. To achieve the high resolution desired over the 
larger area, the depth of sharp focus has to be maintained within very narrow 
limits. This has been accomplished by the use of an air floated system which will 
allow the scanning and lens assembly to "air float" directly on the surface of the 
output film. The lens system is designed to use a high light efficiency in the blue- 
ultraviolet region of the phosphors. In the existing UNAMACE tables a fixed flying 
spot scanner and a reduction optical system is used. Scanning and printing are 
accomplished by moving the diapositives or film across a specific area. In the