| 摘要 |
<p>An example method includes receiving output voltage data from an array of at least four thermopiles placed around the circumference of a projectile such that for any rotation of the projectile during flight thereof, at least a pair of the thermopile having upwardly-facing fields of view referenced to the earth-fixed coordinate system. The method includes determining the pair of upwardly-facing thermopiles based on the output voltage data from the array, with the respective pair of thermopiles including a thermopile p and next adjacent thermopile p + 1. The method includes determining a ratio of the output voltage data from thermopiles p and p + 1, and applying the ratio to a function associating, for any pair of thermopiles n and n + 1, a ratio of output voltage data from thermopiles n and n + 1, and a roll angle ¸ n of thermopile n referenced to the earth-fixed coordinate system.</p> |
