Research Of Parallel Algorithm For Remote Sensing Image Simulation Based On Physical Parameters Of The Ground

With national and international remote sensing technology fast development, there are more and more advanced multi-spectral, hyperspectral, multi-angle and microwave remote sensor was created, which will play an important role in people understandding of our true earth and even the whole universe. How to use our aerospace and remote sensor technologies in application are our final goal. It is the only way to realize the true value of remote sensing by using application oriented development model. As a result, remote sensing image simulate become a very important part of remote sensor design technical demonstration and the research of remote sensing application model. A new image simulation method by using physical parameters of the ground as input are described in this paper. Based on the Aerial images, combined with a reasonable physical model and methods, do inversion of physical parameters of the ground to get the visible light band reflectance spectra are presented briefly. Consider of the Atmospheric parameters and load indicators, get the TOA reflectance by using 6S atmospheric radioactive transfer software, add noise and MTF are discussed briefly. Application shows, combined with the simulated image and arbitrary combinations of multi-band image can effectively test the reasonableness of the sensor design.In this paper, the main contribution and works are discribed as follows:1) As traditional methods of calculating surface albedo rate always use sequence step execution process. As a result, it cost a lot of time on calculation and couldn't meet immediately needs of remote sensing application. This text make some reforms on the traditional method of surface albedo calculate. Making full use of computer cluster let more computers computing at the same time, which improved the speed in calculating surface albedo rate.2) As traditional methods of transfer atmospheric radiation simulation always use sequence step execution process, which cost a lot of time on atmospheric radiation simulation. This text base on the traditional methods and makes some reform on it by using MPI parallel calculation technology and data buffer to promote the speed of atmospheric radiation simulation.