<title>Image stabilization in small satellite optoelectronic remote sensing systems</title>

Abstract

Optical image movement about an image receiver of a space-born remote sensing system causes degradation of spatial resolving power of the system.The report is dedicated to the problem of minimization of that degradation by means of image movement compensation with an image stabilization subsystem.Unknown parameters of the image movement are expressed through measured or calculated parameters of the satellite movement, and the structure of an electro-mechanic compensator connected to the CCD-matrix of the image receiver is elaborated. Stabilization errors caused by the input data errors, by spatial and temporal discretization, and by the operational errors are classified and analyzed. Based on that analysis, a method of minimization ofthe main component of the total stabilization error is suggested.

<title>Dynamic aberration measurement in Earth observation adaptive optics systems</title>

“…In the latter subsystem compensation of the image movement can be provided by the movement of the CCDmatrix or by the movement of the electronic image (accumulated electrical charges) inside the CCD-matrix. We have chosen the last variant and investigated a method of zonal electronic image stabilization [4], a method of electro-mechanical image stabilization along the columns of the matrix [5], and a method of electro-mechanical image stabilization for rotating mini-satellites [5].…”

Application of side-oblique image-motion blur correction to Kuaizhou-1 agile optical images

“…Image motion is caused by the relative movement of image points in the focal plane because of the Earth's rotation, spacecraft orbital motion, and attitude changes. Image motion is a vital factor that affects the spatial resolution of optical sensors [6][7][8] and significantly affects large side-oblique images taken by agile satellites at high resolution [9][10][11]. Therefore, research on the precise calculation of image motion vectors and blur correction is crucial to ensure that agile optical satellites obtain high-quality images.…”