| Fig. 
        3-1 | General spectrometer
	  layout illustrating SCIAMACHY's main components (Courtesy: DLR-IMF) |   | 
      
      | Fig. 
        3-2 |  
          SCIAMACHY functional block diagram with simplified interfaces between assemblies and modules.
		  (Courtesy: DLR-IMF; adapted from EADS Astrium 2004)  |   | 
      
      | Fig. 
        3-3 |  
          Optical configuration level 1. (Courtesy: DLR-IMF; adapted from SJT 1996)  |   | 
      
      | Fig. 
        3-4 | Optical configuration level 2. 
	  Courtesy: DLR-IMF; adapted from SJT 1996)  |   | 
      
      | Fig. 
        3-5 |  
          SCIAMACHY optical 'trains'. Each 'train' defines a path for the measured light through the instrument to the detectors. 
		  Light sources can be external or internal. (Courtesy: DLR-IMF/SRON)   |   | 
      
      | Fig. 
        3-6 |  
          ESM on vibration test adaptor. The leftmost rectangular opening is the Nadir Calibration Window.
		  (Photo: EADS Astrium)   |   | 
      
      | Fig. 
        3-7 |  
          Sketch of SCIAMACHY's TCFoV and observation geometries. (Courtesy: DLR-IMF)   |   | 
      
      | Fig. 
        3-8 |  
          ESM mirror's normal during specified observing geometries. (Courtesy: DLR-IMF)  |   | 
      
      | Fig. 
        3-9 |  
          Same as Fig. 3-8 but for the ASM.  (Courtesy: DLR-IMF)  |   | 
      
      | Fig. 
        3-10 | Single SCIAMACHY
		detector module (left) and the full complement of 8 detector modules (right).
		(Photo: SRON)  |   | 
      
      | Fig. 
        3-11 |  
          The RETICON (top) and EPITAXX (bottom) linear detector arrays. (Photo: SRON)   |   | 
      
      | Fig. 
        3-12 |  
          The signal-to-noise ratios for all channels as obtained during OPTEC-5 tests. The ratios were determined for minimum
		  and maximum radiance signals. (Courtesy: DLR-IMF)   |   | 
      
      | Fig. 
        3-13 |  
        Heat pipes from the optical bench to RAD A (top) and cryogenic heat pipes from detector modules
		7 and 8 to the SRC (bottom). (Photo: EADS Astrium)   |   | 
      
      | Fig. 
        3-14 |  
          The Simplified Engineering Model of the EA with ICU (1), PMTC (2), SDPU (3) and DBU (4).
		  (Photo: EADS Astrium)   |   | 
      
      | Fig. 
        3-15 |  
          Structural Model of the OA showing the SCIAMACHY design with detector modules (1), ESM with Nadir Calibration Window (2),
		  limb baffle with cover (3), RAD A (4), SRC (5) and Thermal Bus (6). (Photo: ESA)  |   | 
      
      | Fig. 
        3-16 |  
         Integration of the OA. (Photo: Dutch Space)   |   | 
      
      | Fig. 
        3-17 |  
          ENVISAT integration on the ESTEC Hydra vibration test facility. The instruments are covered with MLI. SCIAMACHY is the only
		  instrument located on the front panel (top right corner). (Photo: ESA)   |   |