In this paper

the split window technique and the atmospheric motion vectors technique are combined to retrieve the wind vectors from the 11 μm and 12 μm channels on the VISSR onboard the FY-2E geostationary satellite.The sensitivity analysis for at-sensor radiance under different atmosphere conditions indicate that it is possible to treat sand aerosol as tracer of difference images to achieve wind vectors in the low-level moisture fields of the dust outbreak region.On difference image

the gray value of the sand tracer is too small to be used by the Cloud-motion Wind Inferring System（CWIS）

so the linear equationis used to amplify the difference.Finally

a comparison between the wind field over dust storm outbreak area extracted from the difference images using this technique and that obtained from the NCEP reanalysis data shows a good relative accuracy.As a result

the VISSR split window could be used to retrieve wind vectors in the low-level moisture fields over relatively cloud-free areas of the dust outbreak regions.