Studies on Error Propagation by Simulation Model

—Main description of expriments of aero-triangulation—

Abstract

This paper describes the actual experiments of the error propagation and studies of analytical photogrammetry using the simulation method in which we can find the causes of the errors. These studies and the results give the valuable data which are very effective for systematically controlling the errors in aerial triangulation. The main contents in my paper are as follows:
1. Dose the scale errors in the successive models in the form of normal distribution appear when the observation errors propagate in the form of normal distribution?
2. In what form does this scale error propagation in the actual model appear?
3. When the causes of the scale error propagation are found, is the evaluation standard determined normally?
4. What degree of influence is there from the constant errors?
I have done several experiments using the simulation method technique to solve the complicated error propagation of aerial triangulation which is the effective means to research the relations between cause and effect. In this paper, the studies have concentrated on the following points of simulation experiments.
(1) The first part describes how we can produce the soft program of the simulation experiment.
(2) The second part is the method propagating the errors in the simulation models and the kinds of errors.
(3) The final part is the most important; that is the analyzing and evaluation of the influence of the errors in the models to take advantage of control during actual work.
From the above-mentioned points, it is said that these studies are a very important development in the field of controlling and managing aerial photogrammetry and especially in the case of error propagation, we can clearly find the causes of the errors and steps and parts of errors generated when we use these techniques.