公开(公告)号：US06487519B1

公开(公告)日：2002-11-26

申请号：US09487575

申请日：2000-01-19

申请人： Mary D. O'Neill ,  William H. Wellman

发明人： Mary D. O'Neill ,  William H. Wellman

IPC分类号： G04F100

CPC分类号： F42C13/02 ,  G01S11/12

摘要： A method and system of time-to-intercept determination for a radiation source using passively-sensed irradiance data. The invention provides a plurality of noise reduction features to reduce the noise present in the data and improve the accuracy of the time-to-intercept computation. The method includes reducing data noise by defining an acceptable noise level and eliminating any excessively noisy data from the time-to-intercept computation. The method further includes constantly updating the time-to-intercept computation by using irradiance values that are advanced in time. Other features of the present invention includes averaging of irradiance values over a time interval, filtering of the irradiance data received by the method, and triggering at a predetermined time-to-intercept. The invention also includes a time-to-intercept system and processor implementing the above method.

摘要翻译： 使用被动感测辐照度数据的辐射源的时间截取确定方法和系统。 本发明提供了多个降噪特征，以减少数据中存在的噪声并提高时间间隔计算的准确性。 该方法包括通过定义可接受的噪声电平来减少数据噪声，并且从时间到截距的计算中消除任何过多噪声的数据。 该方法还包括通过使用在时间上提前的辐照值来不断地更新时间间隔计算。 本发明的其它特征包括在一段时间间隔内平均辐照度值，对通过该方法接收的辐照度数据进行滤波，以及在预定的时间间隔触发。 本发明还包括实现上述方法的时间间隔系统和处理器。