Optical sensor internal orientation element calibration method based on linear array push-broom

Abstract

The invention provides an optical sensor internal orientation element calibration method based on linear array push-broom. The method comprises the following steps: constructing a rigorous geometric imaging model based on azimuth elements, an attitude orbit and a high-precision digital elevation model in a satellite-borne push-broom optical sensor, and generating an analog image; as for the satellite image and the analog image, using a high-precision registration algorithm combining phase correlation and least squares to obtain registration control points; and solving the external calibrationparameters by utilizing the registration control points in combination with a strict geometric imaging model, and further obtaining the internal calibration parameters. The method is based on the imaging mode of the linear array push-broom sensor, high-precision registration control points are adopted to achieve combined calibration of the satellite, the influence of system errors on the geometriccalibration precision of the satellite is avoided, the positioning precision of the satellite is improved, and the method has very important significance in guaranteeing the application effect of thesatellite in the field of dynamic observation.

Description

technical field [0001] The invention relates to the field of aerospace, in particular to a method for calibrating azimuth elements in an optical sensor based on linear array push-broom. Background technique [0002] After more than 30 years of development, my country's aerospace technology has made great progress, and has formed a remote sensing satellite system for earth observation consisting of resources, meteorology, ocean, and environment. Especially under the impetus of the "High Resolution Earth Observation System" national major science and technology project, through innovations in the development of platform sensors, multi-satellite networking, and ground data processing, the spatial resolution and time resolution of my country's remote sensing satellites The rate and data quality have been greatly improved, providing information services and decision support for my country's modern agriculture, disaster prevention and mitigation, resources and environment, public s...

AI Technical Summary

Problems solved by technology

However, the geometric calibration of active satellites in orbit still does not take into account the characteristics of the domestic linear array push-broom optical satellite imaging platform, resulting in a heavy dependence on high-precision control data during the geometric calibration process, especially the calibration of the inner azimuth elements, which leads to a large number of waste of data

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