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Takes an exposure without opening the CCD shutter, and transfers the data plus headers to an HDS file on the system computer.

Format: DARK <channel> <time> [``<string>'']

Channel: The name of the CCD data acquisition channel to be used.

Time: The exposure time in seconds

Title: A title for the observation (optional)

Examples : DARK RED 9999 "Measuring dark counts"

Comments: As for the RUN command, except that the CCD shutter is not opened, and the observation type is set in the headers as being a DARK exposure.

Fri Jan 7 15:34:48 GMT 1994