Simulation of at-sensor radiance over land for proposed thermal channels of Imager payload onboard INSAT-3D satellite using MODTRAN model

Journal of Earth system science

S Panigrahy1¹  D B Shah2²  H J Trivedi2²  M R Pandya1¹ 

[1] Space Applications Centre, Indian Space Research Organisation, Ahmedabad 380 015, India.$$;N. V. Patel College of Pure and Applied Sciences, Vallabh Vidyanagar, India.$$

关键词: Earth observation;    imager;    INSAT-3D;    land surface;    MODTRAN;    simulation;    thermal infrared.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

INSAT-3D is the new generation Indian satellite designed for improved Earth observations through two payloads – Imager and Sounder. Study was conducted with an aim of simulating satellite level signal over land in the infrared channels of the Imager payload using a radiative transfer model MODTRAN. Satellite level at-sensor radiance corresponding to all four infrared channels of INSAT-3D Imager payload is obtained using MODTRAN and sensitivity of at-sensor radiance was inferred as a function of input parameters namely, surface temperature, emissivity, view angle and atmospheric water vapour, which is helpful in understanding the signal simulation scheme needed for retrieving a very critical parameter namely, land surface temperature.

【 授权许可】

Unknown