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backscatter for all depression angles, frequencies and several 
polarizations. Empirical measurement has verified many results. 
3. A single-lens multiband camera of unusual design has been 
developed, fabricated and tested over a variety of remote sensor test 
areas. Imagery from this camera system has been successfully employed 
to interpret terrain and topographic data and as an input to automated 
image data extraction devices. In one pass, data equivalent to that 
collected by at least three separate cameras can be obtained. 
4. Versatile electro-optical processing of 3-D topographic 
information has been achieved. The device consists of a vidicon 
camera and an x, y, z TV display. The input to the vidicon camera 
is a film chip consisting of digital terrain data which has been 
encoded in shades of gray as a function of height. It may be displayed 
as a 3-D representation of the terrain or any profile selected by a 
cursor may be viewed. The terrain may be rotated and tilted over a 
wide range of perspectives.  Line-of-sight information may be quickly 
developed. The equipment is all analog; requires no programming. 
5. A research study has been sponsored to study potential 
application of holographic techniques to mapping. For topographic 
mapping, stereo photography could be used to prepare holographic 
stereomodels, which when properly prepared and reconstructed yield 
valid photogrammetric measurements. 
6. The Automatic Reseau Measuring Equipment (ARME) is a com- 
puter controlled monocomparator designed to automatically and rapidly 
measure star images, reseaus, and marked points on photographs with 
either homogeneous or heterogeneous backgrounds. By means of prepo- 
sitioning data the table drives automatically to the approximate location 
of the target point, the automatic centering system is initiated, and 
the x-y coordinates of the point together with its identification 
data are recorded in the computer. These data are then corrected for 
known errors and the resultant data punched out on cards. 
7. The Replacement of Photographic Imagery Equipment (RPIE) is 
a high resolution, high speed, large format, image restitution system. 
output format size is 18 x 36 inches and the equipment operates at a 
rate of 4 square inches/minute with a resolution in excess of 100 line 
pairs/mm. Its primary purpose is to replace the imagery of a low reso- 
lution orthophoto prepared from cartographic photography with high 
resolution imagery from panoramic photographs, thus producing a high 
quality orthophoto. 
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