Abstract
In order to improve the geo-location accuracy of the airborne optoelectronic platform and eliminate the influence of assembly systematic error on the accuracy, a systematic geo-location error correction method is proposed. First, based on the kinematic characteristics of the airborne optoelectronic platform, the geo-location model was established. Then, the error items that affect the geo-location accuracy were analyzed. The installation error between the platform and the POS was considered, and the installation error of platform’s pitch and azimuth was introduced. After ignoring higher-order infinitesimals, the least square form of systematic error is obtained. Therefore, the systematic error can be obtained through a series of measurements. Both Monte Carlo simulation analysis and in-flight experiment results show that this method can effectively obtain the systematic error. Through correction, the root-mean-square value of the geo-location error have reduced from 45.65 m to 12.62 m, and the mean error from 16.60 m to 1.24 m. This method can be widely used in systematic error correction of relevant photoelectric equipment.
Highlights
Academic Editor: Theodore MatikasReceived: 13 September 2021Accepted: 11 November 2021Published: 22 November 2021Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.Airborne optoelectronic platforms, which can realize a wide range of search, identification, tracking and measurement tasks, are playing an increasingly important role in military and civilian applications such as search, rescue of the wounded and target reconnaissance, etc. [1,2,3,4]
The geo-location system introduced in this article is composed of a ground control station, a digital and image transmission link and an unmanned aerial vehicle (UAV) with an airborne optoelectronic platform, as shown in the Figure 1
In order to verify the method mentioned above, a UAV equipped with a position and orientation system (POS) system and the airborne optoelectronic platform was used for flight experiments
Summary
Academic Editor: Theodore MatikasReceived: 13 September 2021Accepted: 11 November 2021Published: 22 November 2021Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.Airborne optoelectronic platforms, which can realize a wide range of search, identification, tracking and measurement tasks, are playing an increasingly important role in military and civilian applications such as search, rescue of the wounded and target reconnaissance, etc. [1,2,3,4]. Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Airborne optoelectronic platforms, which can realize a wide range of search, identification, tracking and measurement tasks, are playing an increasingly important role in military and civilian applications such as search, rescue of the wounded and target reconnaissance, etc. The process of obtaining geographic coordinate information of a target using an airborne optoelectronic platform is called geo-location. Accurate geo-location is of great significance to the rescue of the wounded, target reconnaissance, etc. In recent years scholars have conducted extensive research on geo-location algorithms. The following methods are used to improve the geo-location accuracy:
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