2. The Instrument

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)


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