Defining of the Robust Criteria for Radar Image Focus Measure

In a case of significant aircraft trajectory instability it's difficult to define the synthesis parameters to obtain the best available resolution. A radar image synthesized with incorrect parameters looks blurry. There are algorithms which allow to define the synthesis parameters to improve image quality. Most of the algorithms are used in digital photography and microscopy. Radar images have the features that distinguish them from a photo thus the additional research of the robustness and the focus measure quality have to be performed.Different methods comparison is presented in the paper. The methods are tested on the radar images containing bright point targets, low contrast targets, etc. The most robust method which is suitable for the most of settings is defined by comparison.