We present an approach to spectropolarimetry with no moving parts. The approach encode the
polarization information at each wavelength along the spatial dimension of a two dimension date array using
static, robust double combo wedges modulator, and realize the measurement of full Stokes parameters. Firstly,
the paper present the principle of spatial modulating spectrometry and its configuration; Secondly, the
measurement matrix is derivate at different configuration of double combo wedges; Finally, measurement error
distribution of Stokes parameters in different measurement matrix is calculated using least squares method, and
the analyzer angle of polarizer is given with the minimum variance for each Stokes parameters.