search radius meaning in English

搜察半径
搜索半径

It is recommended that you use a search radius is set to a value corresponding to a few arc seconds
如果在预定位置的搜索半径内有对应星，软件将设定这就是星表所对应的参考星。
Search radius : the search radius , in pixels , used by the software when it tries to match detections on the individual images
搜索半径：以像素为单位的搜索半径，用以对单个图片的自动目标检测。
First , we develop the local search such that the search direction , search radius and numbei of search points are adjusted according to the previous search result
首先改进了局部搜索算法，使得搜索方向，搜索半径和搜索所计算的函数值个数根据已有的搜索结果而自适应调整。
If larger values are used , the software will more frequently find stars within the search radius which are not identical to the reference stars it is searching for , causing the reference star match to fail completely in some cases
建议你使用合适的搜索半径，如果你使用太大的搜索半径，软件将在搜索半径内发现多个目标目标从而使其无法正确的与星表对应，而且甚至可能是匹配发生错误。