NASA Photo ID: STS052-71-057      File Name: 10065337.gif 
 
Film Type: 70mm CN                Date Taken: 11/01/92 
 
Title: STS-52 CANEX-2 Canadian Target Assembly (CTA) held by RMS over OV-102's PLB 
 
Description: 
 
In operation during STS-52 above the payload bay (PLB) of Columbia, Orbiter  
Vehicle (OV) 102, is the Canadian Experiment 2 (CANEX-2) Space Vision 
System  (SVS) experiment. Target dots have been placed on the Canadian 
Target  Assembly (CTA), a small spacecraft, in the grasp of the 
Canadian-built remote  manipulator system (RMS) arm.  With the shuttle's 
closed circuit television  (CCTV) system, the payload specialist monitors 
the movement of the 4-foot by  7-foot by 1.5-foot deployed spacecraft, 
whose surface is covered with many  sets of dots of know spacing.  As the 
satellite moved via the RMS, the SVS  computer measured the changing 
position of the dots and provided real-time  television display of the 
location and orientation of the CTA.  This type of  information is expected 
to help an operator guide the RMS or the Mobile  Servicing System (MSS) of 
the future when berthing or deploying satellites.  Also visible on the RMS 
is another CANEX-2 payload, the Material Exposure in  Low Earth Orbit 
(MELEO).  On the mission-peculiar equipment support structure  (MPESS) 
carriers in the center background is the United States (U.S.)  Microgravity 
Payload 1 (USMP-1) with Space Acceleration Measurement System  (SAMS), 
MEPHISTO (its French abbreviation), Lambda Point Experiment (LPE)  cryostat 
assembly (identified by JPL insignia), and LPE vacuum maintenance  
assembly.  On the starboard wall (left)) is the Attitude Sensor Package  
(ASP).