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11.25 2 Same as above, but 6:00:00 +6d advance six days from current time -13.4h subtract 13.4 hours from current time Ap April of current year 7.125 7th of current month at 3:00 7 : 7th of current month, leave time unchanged :43:18 (or :43.3) 43 minutes 18 seconds, hour unchanged JD 2451545. 1 JAN 2000 12:00 j2451545 same as above 2451545 same as above mjd 51000 MJD 51000 = JD 2451000.5 = 6 Jul 2008 0:00:00 2008-03-14T15:26:53.5 FITS-style time: 2008 Mar 14, 15:26:53.5 2008/50 (or 50-2008) 50th day of 2008: 2008 Feb 19 50 2008 3:14:15.9 same as above, but sets time to 3:14:15.9 50.75 2008 50th day of 2008, 18:00 050.75 50th day of current year, 18:00 2008 o (or Octob 2008) 1 OCT 2008 00:00:00 y1952.34 decimal year, near April 1952 1952.34 same as above It's best to enter the year, month, and day in the order you selected in the Time Format dialog. Guide can always tell that "25 Oct 1987" means a day, month, and year, in that order, and will understand it even if the currently-selected time format is something else. But to understand "10/11/12", it has to rely on the Time Format dialog setting. Months, days, years can be separated by -, /, ., or space. Hours, minutes, and seconds can be separated by : only. If you've checked the "two-digit years" box in the Time Format dialog, then you can enter a year between 1940 and 2039 with just the last two digits. Be warned that in this case, it becomes more important that the year, month, and day be in the order selected in the Time Format dialog. So it's probably best to continue entering all four digits of the year, and to enter month names as text; with that format, there can be no confusion, no matter what order you use. The next item gives you some control over the field of view shown at a given level. Suppose you're at level 9, where the field of view is normally 30 arcminutes. The menu item will reflect that fact, reading "Level 9: 30'". Suppose you would prefer a slightly smaller field of view, say, about 24 arcminutes. If you click on this menu item, Guide will show you a dialog box with the field sizes for all twenty levels. You can adjust them as you wish; for example, you could reset the entry for level 9 to be 24' (or .4, as in .4 degrees, or 1440", as in 24 times 60 arcseconds; these would all be equivalent). The size of level 9 would henceforth be 24', not the default 30'. (If you just want a simple way to get fields of view other than those provided with Guide, it's better to use the Fixed Levels option in the Extras menu, described on page 54.)
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