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COS Instrument Handbook for Cycle 24 |
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Table 5.3 and Table 5.4 show the wavelength ranges recorded on the detectors for each valid combination of grating and central-wavelength setting at the nominal FP-POS=3 position (Section 5.8.2). The wavelength ranges spanned at other FP-POS settings may be estimated using the FP-POS step values provided in Chapter 13. Note, however, that uncertainties in the positioning of the Optics Select Mechanisms (Section 3.1.3) correspond to about half of an FP-POS step. These wavelength ranges are subject to change as the instrumental calibration evolves. The most recent measurements are available from the COS website