Improvement of Infrared Horizon Detector Using Two-dimensional Infrared Temperature Distribution Model

摘要

A two-dimensional infrared temperature distribution model and attitude estimation method using infrared sensor is explored. The infrared sensor model is generated base on software Modtran and infrared sensor's characteristic using spherical harmonics function. The simulation results of this model demonstrated un-applicable atmospheric conditions and solar influence. The ground-based measured 2-D infrared temperature data verified the sky temperature distribution with solar influence is similar as the simulation results. The errors caused solar are eliminated by combined azimuth information and IR sensor's data together through this model. The experimental results demonstrate that this method yields reasonably accurate attitude information.