The value is te total numbre of times to repeat the block. Optional Requests that an observaton start at a particular local hour angle. The LSTdelta is the allowed tolerance. The scheduler will read this file and insert it in the schedule only if the UT date in in the file matches that given in the file. This option is used if the desired sensitivity requires darks to be taken as close to the time of the image as possible for better dark subtraction.
Valid values are 'none', 'bias', 'thermal', 'bias only', 'thermal only'.
Keywords that are not changed between scans default to their last values. Keywords which require strings, such as title and observer, should be in single quotes. Keywords are parsed , so that the user need only type as many letters as are needed to distinguish different keywords. For example, Durationand Dur are both acceptable, but D is not because it is confused with Date. Keywords which contain spaces e.g. 4 Vesta, must be surrounded by quotes.