dy / 
under- 
taining 
P 
ugh 
1e 
ests 
ice 
he 
Of course, the target luminance magnitude and uniformity of distribution over the range of 
angles for the target position and its orientation depend on geometrical relationships of position and 
orientation of the component elements as shown in Figure 9. Here the co-ordinate systems for these 
components follow the same x, y, z convention and Euler angle description as described earlier for 
Figures 5(a) and 5(b). Accordingly, in a simple consistent procedure, the position and orientation 
of one co-ordinate system with respect another is designated by the same convention of ordered 
subscripts. To obtain performance data in accordance with the analysis for these relationships, 
further tests would be needed. Although such tests could be done using telephotometer and 
photographic means, they would be more readily implemented (and directly related to operational 
use) by means of the computer controlled video sampling processor. 
  
  
CAMERA INTERFERENCE BEAM CORNERCUBE 
LENS FILTER SPLITTER REFLECTOR 
X 
KA xi) 
Z 
Ye Xc y XF s Y«(i) 
F 
Xs 
LIGHT y 
SOURCE s 
FIG. 9: THE CO-ORDINATE SYSTEMS FOR THE COMPONENTS OF THE 
ILLUMINATION-TARGET SYSTEM (FOR DEFINING THEIR GEOMETRIC RELATIONSHIPS) 
Summary — In this section, the formulation of the design concepts, their technical assessments of 
feasibility and development studies to obtain performance data to confirm their technical implementation 
have been described. As a result, the formulation of design, with an analytical description and perform- 
ance related data, was developed for a 30 Hz, real-time single video camera photogrammetric system for 
possible Shuttle implementation. 
Given that this process had led to a design for a video sampling processor with a wide range 
of potential applications and an illumination-target system permitting reliable operation over a wide 
range of ambient illumination conditions, it was decided to proceed to the next stage of this systems 
engineering methodology and develop a laboratory experimental system. 
DEVELOPMENT OF THE LABORATORY EXPERIMENTAL SYSTEM 
The laboratory experimental system as it has now been developed in accordnace with the 
experimental-measurement-analysis methodology is composed of three basic subsystems: 
1) The 30 Hz real-time video photogrammetry system, which is the object of this study and 
whose basic components are the video camera-sampling processor-computer-TV monitor 
and computer interfaced output devices (meters, tape recorder, keyboard terminal). 
19