基于HJ-1 A/B卫星CCD数据的江汉平原农田物候探测

摘要

利用HJ-1A/B卫星CCD数据,提取2013―2015年三年江汉平原农田的归一化植被指数NDVI,构建时间序列曲线,利用小波变换对HJ-1A/B卫星所得的NDVI数据进行平滑降噪处理,结合地面调研资料,提取江汉平原农作物的物候信息.研究结果表明,HJ-1A/B卫星可用于农田物候监测,对于小区域的农田作物长势监测具有独特的优势.%This paper extracted NDVI data from HJ-1A/B CCD imagery and constructed a time-series curve for Jianghan plain from 2013 to 2015, which was further smoothed by wavelet analysis to eliminate noises. Finally, different phenology stages of the crops in Jianghan plain were detected. With the aid of field investigation, the result showed that HJ-1A/B satellite imagery had unique advan-tages at phenology detection in a small-scale region, for its both high temporal and spatial resolution, and was able to derive reliable cropland phenology.