GEE python——Standardized precipitation evapotranspiration index(SPEI) (标准化降水蒸散指数(SPEI))
ContinuousNDVIcollectionfromAVHRRandMODISImport,authenticateandinitializetheEarthEnginelibrary.importeeee.Authenticate()ee.Initialize()ToauthorizeaccessneededbyEarthEngine