정지궤도 해양탑제체의 초기 통합적 수치모사 기법

Abstract

In recent remote sensing researches, one of the essential techniques are how to estimate the current and future status of satellite on the orbit. Integrated Ray Tracing(IRT) method, what we report in this paper, has been developed as the state-of-art end-to-end simulation technique. We focus on the IRT technique for the Geostationary Ocean Color Imager(GOCI) which was launched on June 2010. IRT simulation technique deals with 3D modeling of GOCI flight model as well as the entire space environments among the Sun, the Earth, and the GOCI. The Sun model as source is defined a random grid light source emitting the power over the GOCI observational wavelength range from 412nm to 865nm. And we constructed the Earth model having an area of about 2,500km by 2,500km around the Korean peninsula, which was separated with land and ocean surfaces and it defined as Lambertian scattering model. The GOCI instrument formed in IRT model, and it is typically three-mirror anastigmat system which is considered with the realistic surface characteristics such as reflectance, transmittance and so on. With considering the 16 slot images, we confirmed the similar acquisition images to the real observing image. For the image of April 5th, 8 time images were constructed while the elevation angle of the Sun was changed. Furthermore, we compared the radiometric calculation between in-orbit GOCI performance and the