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The procedures for acquiring data with the IPCS are basically the same as those for acquiring data with CCDs, set out in Section 9.1.3. However the data acquisition commands EXPOSE IPCS or EI, and KEEP IPCS or KI must be used instead of the CCD commands RUN, ARC, GLANCE etc. If the IPCS and a CCD are being used simultaneously then the old version of the software (S0-3) will be running, and the old CCD commands (e.g. EXPOSE RED and KEEP RED) will need to be used to control the CCD. This situation is expected to change by early 1993.
When acquiring data with the IPCS some additional precautions should be
As with the CCDs, calibration lamp exposures should be taken approximately every 15 - 30 minutes, or on a 5 degree change in elevation, or on any change of the rotator position angle.
If observing simultaneously with the IPCS and a CCD, the DMS is capable of handling both detectors simultaneously. It is not necessary to ensure that the IPCS integration finishes before CCD readout begins; the DMS can be integrating in an IPCS buffer while a CCD reads out into a different buffer, and it can also handle data transfer from a CCD buffer to the Vax or the Sparcstation whilst an IPCS integration is in progress.