【摘要】：As an active microwave remote-imaging system, synthetic aperture
radar(SAR)has applied in the field of military reconnaissance, the field
of resource exploration and the filed of disaster watch. As airborne
synthetic aperture radar possesses the characteristics of agi1ity and high-
resolution, it has been an important direction for SAR. Currently, many
developed countries do their best to research the airborne SAR system
which can obtain more high resolution so as to meet the expectation of
military and civil affairs.
Walter G. Carrara who has engaged the research of SAR for many
years has said: "In SAR, motion is not only answer but also question.".
The sentence shows: on the one hand the motion between radar carrier
and the area of imaging is the key of high-resolution imaging, on the
other hand, the motion error will damage the capability of high-
resolution imaging. And that compared with spaceborne SAR,airborne
SAR demands more high resoluton and it is easier to be affected by
interference factor of outside and produce greater motion error than
spaceborne SAR. To obtain high resolution SAR image,it is needed to
carry out motion compensation. So it is important to research the motion
compensation of airbome SAR system.
This paper mostly discusses the motion compensation of airborne
SAR system; at the same time applies computer simulation and raw data
of L-SAR system to analyze the result.
The main content of this paper include:
Chapterl provides introductory definitions and the history present
Chapter 2 provides the theory of SAR imaging and introduces the
concepts of motion error and motion compensation.
Chapter 3 analyzes the affection of motion error and precision need
of motion compensation.
Chapter 4 applies L-SAR raw data to extract motion error model
and analyzes the methods of motion compensation.
Chapter5 gives a sum-up of this paper, and lists some valuable
research direction and problems.