Computer program which yields CRT displays will decrease the time and labor required to reduce and provide a profile plot of surface plate calibration data. The displays depict actual and resolved data points for each individually calibrated line

Reed, R. W.

English

NASA Technical Reports Server

December 1967	 Brief 67-10492 
NASA TECH BRIEF I& 
NASA Tech Briefs are issued to summarize specific innovations derived from the U.S. space prograth, 
to encourage their commercial application. Copies are available to the public at 15 cents each 
from the Clearinghouse for Federal Scientific and Technical Information, Springfield, Virginia 22151. 
Computer Program Reduces and Provides Profile Plot of Surface Plate 
Calibration Data 
The problem: 
To develop a method that will decrease the time 
and labor required to reduce and provide a profile 
plot of surface plate calibration data. Hand reduction 
methods required approximately 3-1/2 hours. In addi-
tion there was no method to quickly determine the 
margin size and number of data required to give a 
diagonal center point to make C2 = A 2 + B2. 
The solution: 
A computer program which yields CRT displays 
depicting actual and resolved data points for each 
individually calibrated line. Moreover, the program 
will yield a profile graph of the calibrated portions 
of the entire surface plate with computed values rel-
ative to diagonal center being equal to zero. All sur-
face plate stations are related to zero. 
How it's done: 
The program accommodates surface plates with up 
to 24 mirror base increments on the long side. In 
addition, a group of 20 sample graphs have been 
prepared which establish at a glance the necessary 
requirements as to margin, base size and number of 
data points on the diagonal, longitudinal, and trans-
verse lines.
The time required to reduce and plot this data has 
dropped from 3-1/2 hours for hand reduction to ap-
proximately 3-1/2 seconds per case for the computer. 
The sample graphs save approximately 1 hour per 
case, eliminate the probability of missing center 
entirely, and insure uniformity in surface plate 
calibrations. 
Notes: 
1. This program is written in Fortran IV for use on 
the IBM 360 computer. 
2. This program has general application to any sur-
face or surface plate where calibration data with 
reductions are required to produce a CRT profile 
plot. 
3. Inquiries concerning this program may be made to: 
COSMIC 
Computer Center 
University of Georgia 
Athens, Georgia 30601 
Reference: B67-10492 
Patent status: 
No patent action is contemplated by NASA. 
Source: Robert W. Reed
of North American Aviation, Inc.
under contract to
Marshall Space Flight Center
(MFS- 13866) 
Category 06 
This document was prepared under the sponsorship of the National 
Aeronautics and Space Administration. Neither the United States 
Government nor any person acting on behalf of the United States
Government assumes any liability resulting from the use of the 
information contained in this document, or warrants that such use 
will be free from privately owned rights.
https://ntrs.nasa.gov/search.jsp?R=19670000491 2020-03-11T20:58:21+00:00Z


Computer program reduces and provides profile plot of surface plate calibration data

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