NOAA/AVHRR and TM Monitor Target System Union in Degree Desertification Judgement Application and Research

摘要

First, the article analyzes the NOAA/AVHRR vegetation index to reflect between the spectral response and the vegetation degree of coverage approximate relations. It compares with some commonly used vegetation index superiority and limitation, and chooses growth season (6-9 month) the accumulation MSAVI value takes desertification monitor target, also can eliminate the soil as far as possible the influence, also does not need the artificial determination parameter, compared with convenient is objective. Then, determined desertification degree determination to the TM monitor target system the method and the characteristic has carried on the discussion. The main shortcoming is in carries out in the standard the human factor influence to be bigger, therefore here does not take this kind of target the article desertification monitor the major targets or quotas system. Then through the regression analysis method, establishes TM at the same time the MSAVI value and the same age the NOAA/AVHRR MSAVI value linear regression equation. TM MSAVI unifies to the NOAA desertification target system. Finally, it judges desertification degree using the NOAA/AVHRR target system.