DEM generation method and device for correcting orbit error based on ICESat-2, equipment and medium

The invention discloses a DEM generation method, device and equipment for correcting orbit errors based on ICESat-2 and a medium, and the method comprises the steps: obtaining InSAR data of a target region, carrying out the preprocessing, and obtaining an interferometric phase and an initial baseline parameter; performing terrain removal, filtering and unwrapping processing on the interferometric phase by means of an external DEM to obtain an unwrapped differential interferometric phase; extracting a ground control point from the ICESat-2 data, and calculating a difference value between a control point phase and an interference phase; constructing an InSAR orbit phase error model on the basis of the baseline parameter initial value and the change rate, calculating to-be-estimated parameters of the model, and further calculating an orbit error phase of the whole image and corrected baseline parameters; and deducting the orbit error from the unwrapping differential interference phase, performing phase height co