Method based on the polarimetric radar large area near real-time Monitoring Rice phenological period of compacting

The invention discloses a kind of method based on the polarimetric radar large area near real-time Monitoring Rice phenological period of compacting, including: (I) planning is prepared, field measurement: select suitable radar data source, carries out the time of field synchro measure in conjunction with the planning of its satellite transit time；Field synchro measure obtains GPS vector file and Oryza sativa L. sample points evidence；Oryza sativa L. sample point is divided into two set, and A1 is training sample, and A2 is checking sample；(II) Oryza sativa L. classification: obtain the suitable polarimetric radar image that compacts, pretreatment, extraction and analysis key radar parameter；Set up sorting algorithm and obtain result；Checking sample is utilized to carry out nicety of grading evaluation；(III) phenology inverting: to each sample analysis in A1；Extraction and analysis key radar parameter；Set up inversion algorithm；Utilize the sample checking precision in A2 set；Effective radar parameter and algorithm are determined in adjustment.The present invention has that monitoring range yardstick is big, the degree that becomes more meticulous high and puts into practice the advantage that generalization is good.