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5.5 PHT-S wavelength calibration  

The in-orbit PHT-S wavelength calibration was performed by measuring emission line objects with PHT-S; see section 4.6.2. The accuracy in the central wavelength for each pixel is somewhat smaller than one tenth of a pixel except for a small part of SL where the uncertainty is marginally larger. The accuracy of the wavelength calibration is discussed in [11]



ISOPHOT Data Users Manual, Version 4.1, SAI/95-220/Dc