Synthesis of an Optimal Search Algorithm and Estimate of the Accuracy for an Iconic Navigation System Using Images of Earth's Surface Fields

摘要

An iconic navigation system that uses images of earth's surface fields in the optical range is considered. Using a linearization of the photogrammetric equations of the iconic system that contains a line of photo receivers and produce images in the course of movement of the aircraft, a mathematical model of the observed signal is obtained that is oriented to testing the hypotheses on the position, flight altitude, heading, and horizontal components of aircraft motion and to the identification of statistical characteristics of particular channels of the photo receiver. Based on this model, a search algorithm for data processing based on the criterion of the maximum of the likelihood function is constructed. Quality evaluations for the identification of statistical characteristics of separate channels of a photo receiver and the accuracy of determining the position, flight altitude, heading, and speed of the aircraft are obtained.