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5.4. Reference Scan Memory Effects
Reference scans and detector memory effects can combine to affect the flux calibration of band 2 and 4 detectors during AOT S06 observations. This possible problem is traceable to memory effects left over from reference scans.
A user entering data for a S06 or S07 SW wavelength range scan has to enter three wavelengths - the start wavelength, end wavelength and a reference wavelength - and two fluxes - the flux at the reference wavelength and the maximum flux expected over the wavelength range. If the signal at the reference wavelength is considerably higher than that in the rest of the wavelength region memory effects may be introduced by the reference scans that remain in subsequent scanning operations.
Only band 2 or 4 observations with AOT S06 may be affected, and only if the reference scan signal is several times the average signal.
The adopted solution to this problem was to delete reference scans from all observations with S06. This change took place for all observations planned after June 10 1997.
A. Salama et al.