Based on the quantitative analysis ofthe major errorsources for NOAAAVHRRdata

this paper presents a new navigation method .In this method

correction oftime driftonboard and adjustmentofthe ephemeris datais carried out atthe criteria ofconstraint Least Mean Square Error;andthe spacecraftattitude deviationsis also estimated and cor rected .This navigation methodiscomprehensively considered with othercriticalelementsoflocation

such asorbitcalcu lation ofsatellite

determination ofthe positioninformation ofeach pixel

and preciseimageregistration betweenreference image andslaveimage.By using high resolution 1 :1

000

000 digital map dataand LANDSATTMdatatoidentify GCPs （Ground Control Points）

the geolocation accuracy ofselected GCPs can be improved . With these accurate GCPs

the geolocation accuracy of navigation for NOAAAVHRRdata can be improved to 1km in the whole image

and lessthan 1km at nadir.