Major modifications are made to the setup and signal processing of method in-situ measurement pitch a diffraction grating based on angles diffracted optical frequency comb laser emanated from grating. In method, improvement uncertainty can be expected since every mode in utilized. Instead employing Fabry-Pérot etalon for separation neighboring modes group beams, weight-of-mass is introduced det...

Due to the difference in illumination condition, atmosphere condition, shooting angle and other inner and outer factors, there are differences in radiometry between different optical remote sensing images. The radiometric differences will affect the mosaic result and further affect some applications. To minimize such radiometric differences, radiometric normalization between images is a useful ...