CAJ | 학술논문

基于 MODIS/TERRA 、FY -3B/MERSI 和 HJ/CCD 监测数据，结合研究区同步土壤湿度实测资料，利用垂直干旱指数（PDI），对比分析了各传感器在干旱时空动态中对旱情响应的敏感性和可靠性。结果显示：在黄土高原半干旱区各遥感卫星监测到的 PDI 指数与土壤相对湿度呈显著负相关，与0～20 cm 相对湿度相关最为密切；MODIS 的 PDI 监测信息与实际春旱发展前期状况最为接近，HJ 的 PDI 监测信息对干旱后期效应性相对较差，HJ 、MODIS 和 FY3B 的 PDI 监测信息都能够比较真实的反映干旱缓解后的实际情况。
기우 MODIS/TERRA 、FY -3B/MERSI 화 HJ/CCD 감측수거，결합연구구동보토양습도실측자료，이용수직간한지수（PDI），대비분석료각전감기재간한시공동태중대한정향응적민감성화가고성。결과현시：재황토고원반간한구각요감위성감측도적 PDI 지수여토양상대습도정현저부상관，여0～20 cm 상대습도상관최위밀절；MODIS 적 PDI 감측신식여실제춘한발전전기상황최위접근，HJ 적 PDI 감측신식대간한후기효응성상대교차，HJ 、MODIS 화 FY3B 적 PDI 감측신식도능구비교진실적반영간한완해후적실제정황。
Based on the MODIS/TERRA ,FY - 3B/MERSI and HJ/CCD monitoring data ,combined the syn-chronous measured soil moisture data in research area ,using the perpendicular drought index (PDI) ,comparatively ana-lyzed the sensitivity and reliability of various sensors responded to drought .The results showed that :It was the negative correlation between the PDI indexes with the soil relative moisture from the various remote sensing of satellites in the semiarid Loess Plateau ,and it was the most close with the relative soil moisture in 0 ~ 20 cm depth ,also the monitoring PDI index of the MODIS was more close with the real situation in early spring drought development ,but the PDI moni-toring information of HJ was relatively poor to drought effects in late ,the whole PDI monitoring information of the HJ , MODIS and FY3B can be reflected the actual situation after the drought relieved .