IMPROVEMENT OF SXT IMAGE ALIGNMENT IN ORDER TO OBTAIN HIGH-RESOLUTIONTEMPERATURE MAPS

Examples are shown and discussed which indicate that published tempera ture maps derived using SXT intensity ratio technique may be substanti ally biased if standard image processing routines are used to coalign the images. Methods are discussed which allow for independent of the Y ohkoh satellite pointing information, precise (0.12 arcsec), alignment of images obtained in selected energy bands (filters). Examples are p resented illustrating the differences in the temperature maps derived using standard and additional pointing correction (APC).