초록 ▼

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 inclu

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.

대표청구항 ▼

1. A method of determining a time-to-intercept for a radiation source using irradiance values of the radiation source, the method comprising:computing the time-to-intercept using at least three irradiance values; and reducing noise in the time-to-intercept computation by using a continuously-updated

1. A method of determining a time-to-intercept for a radiation source using irradiance values of the radiation source, the method comprising:computing the time-to-intercept using at least three irradiance values; and reducing noise in the time-to-intercept computation by using a continuously-updated calculation, based upon recent values, and upon initial values; where, performing the calculation comprises determining a signal-to-noise ratio (SNR) value of each irradiance value and rejecting from the calculation an irradiance value having a SNR value that is less than a threshold SNR value.