Through differential interferometry of ascending and descending orbit ASAR data, the authors obtained the Double-LOS

coseismic deformation fields of Gaize earthquake in Tibet. A characteristic analysis of coseismic deformation field indicates

that the Ms 6.9 mainshock and Ms 6.0 aftershock both showed the typical model of normal fault and successively gave birth to east

and west normal faulted fracture zones with different sizes probably at depth, trending NE and dipping NW, with the formation of

east and west subsiding centers on the northwest plate. From the incising of interferometric stripes, it can be judged that the

east and west subsiding centers are controlled respectively by January 9, 2008 Ms 6.9 mainshock and January 16, 2008 Ms 6.0

aftershock. The Ms 6.9 mainshock shaped the basic pattern of subsiding in the northwest plate and uplifting in the southeast

plate. And the Ms 6.0 aftershock caused the further subsidence of the epicenter and the western part of the northwest plate;

therefore, the subsidence value of the west subsiding center is larger than that of the east subsiding center. The obtaining of

coseismic deformation fields of ascending-descending orbits has provided the better restriction and information for further

hypocenter mechanism simulation and 3-D deformation field calculation.