5 
resolution of 2¿¿m. The photography is viewed through a Zeiss mirror 
stereoscope. The computation equipment shown in Figure 3 consists of a 
Hewlett-Packard 9810A calculator with a tape cassette memory unit. The 
calculator is fully programmable and the programs and data can be stored 
on either magnetic tape or magnetic cards. The remaining items of equipment 
shown ir. Figure 4 in composite are the interface unit and the control console. 
The equipment weighs a total of 240 pounds and can be set up on a desk or 
table. 
Operation - A typical APPS operations proceeds generally as shown in Figure 5. 
a. A point of interest is identified or marked on reconnaissance 
photos or other stimulus material such as infrared and side-looking radar 
images. 
b. The area of immediate interest in the stimulus material is visually 
located on the photomosaic of the entire area covered by the data base. 
Reference numbers on the mosaic identify the photos which provide stereo 
coverage of the area of immediate interest. 
c. The operator obtains the desired photos from the data base file and 
mounts them on the Stereotope photocarriage. The orientation of the photos 
on the carriage need not be precise. The point of interest is identified on the 
photos by visual comparison with the stimulus material. 
d. The operator pushes keys on the calculator keyboard to load the program 
from the tape cassette into the calculator. This requires less than 30 seconds 
and need not be repeated unless the system is shut down.