SSUSI is a far ultraviolet scanning imaging spectrometer, which can detect 5 spectral bands of ultraviolet aurora (HI-Lyman α@121.6 nm、 OI@130.4nm、 OI@135.6 nm、 N2-LBHS@140-160 nm and N2-LBHL@160-180 nm) for synchronous scanning imaging observation, its mirror rotates perpendicular to the satellite orbit, and each scan produces an image of 16 ×156pixels. Due to the DMSP satellites need 20-30 minutes to fly over the polar regions, SSUSI can obtain an image covering 1/3 to 1/2 of the auroral oval with a spatial resolution of about 10 × 10 km for each polar flight.In order to reduce the influence of dayglow on SSUSI image data, we only use data from October to December 2004 to 2006 for the study of substorm detection (the aurora oval region in the northern hemisphere during this period is in the polar night region, and the aurora image is weakly affected by dayglow and solar light). The zip file SSUSIdata_mat contains two folders, the plain folder contains the data without the westbound surge structure and the wts folder contains the files with the westbound surge structure.