A16_SMSS_72_M016936_017                                                       
                                                                              
Apollo 16 Soil Mechanics                                                      
Lunar Self-Recording Penetrometer (LSRP) Page B-3                             
                                                                              
Lunar Penetration Data Reduction Table, Index no. 5 (first test)              
                                                                              
This handwritten table holds the raw data read from the penetrometer          
drum and the reduced data determined from the calibration tables for the      
run designated index 5 and used to make the stress vs. penetration plot       
A16_SMSS_72_M016936_004, page A-1.  This is the first of two pages for        
this table, the second page is A16_SMSS_72_M016936_018, page B-4.             
                                                                              
All 11 Apollo 16 Lunar Self-Recording Penetrometer (LSRP) runs were           
performed by lunar module pilot Charles Duke on the second EVA                
(extravehicular activity) on 22 April 1972. The first four tests were         
done at station 4, which was high in the side of Stone Mountain, in the       
Cinco crater area, at the astronaut-named, roughly 10 meter diameter          
Bench Crater, about 4 km south of the landing site.  (The landing site        
was at 8.9730 S latitude, 15.5002 E longitude.) This was the first stop       
of the second EVA.  The runs at station 4 started with the LSRP index         
set to 5.  All runs were done using the flight unit S/N 2004, lunar drum      
S/N 2008.  The data reduction was done at the University of                   
California Soil Mechanics laboratory on 11-12 May 1972.                       
                                                                              
This run (first run, index 5) was done uphill, south of the rover on the      
top part of the crater. It was performed at 18:24:05 UT (144:30:05            
Mission Elapsed Time, or MET) using the 3.22 square centimeter (0.5           
square inch) cone.                                                            
                                                                              
The table columns give the drum load in degrees/minutes, the drum load        
in decimal degrees, the drum circumference deflection in millimeters          
(decimal degrees multiplied by .5542), the load in Newtons (calculated        
from a calibration curve), and the stress in Newtons per square               
centimeter (load divided by the cone or plate base area).  This gives         
the value for stress used on the plot. A second set of columns starts         
with a column labelled initial drum depth/final in cm and gives a             
running total of the drum reading.  The next column, delta Drum Depth         
Reading in cm gives the difference between the current drum depth             
reading and the initial value. The next column, penetration depth in cm,      
is the drum depth reading multiplied by 31.3 from the calibration             
tables, see A16_SMSS_72_M016936_015, page B-1. This gives the value for       
penetration used on the plot.