Program developments for the Analytical Plotter AP/C-3 
1 at the Technical University of Hannover. 
Int rodu ctlon . 
The photogrammetrie Institut of the Technical University 
of Hannover is engaged in software development for the 
Analytical Plotter AP/C-3, to extend the possibilities 
of this digital photo gramme trie instrument. 
A brief summary of these activities is given in this 
paper. 
Systcm co nfiguration of th e AP/C-3• 
The control computer of the OMI-Analytical. Plotter is 
an IBM 1120 unit with 8 k core storage and a magnetic 
disk with 212 000 16 -bit words, I/O-units are paper 
tape reader /-punch and console keyboard-printer. 
The base of the soft\vax*e system is an Assembler real- 
tine program, written at the University of New Brunswick, 
Canada (Fig.1). It is maintained by the IBM 1120 disk 
Monitor system version 2« 
For relative and absolute orientation computation, 
independent Fortran programs are existing. Tney are 
connected with the real-time program, by the 1120 disk 
LINK capability. A COMMON data area is reserved in core 
for parameters used in the different independent programs 
A detained 
in[ 1 ]and[ 2 ] 
description of thi 
, the main program 
s software package is given 
listings are collected in[ 2 j