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Sorting Differences between Desktop and Mobile

There are a few differences in the way Deep-Sky Planner sorts observing plans in Windows and on Mobile (Android & iOS).

Firstly, there are more sort options in the Windows version. When an option is specified in a plan file that does not exist in the Mobile version, the sort option is ignored.

Secondly, the two different database engines handle missing Surface Brightness values differently - the Windows edition sorts missing values to the top of ascending order while the mobile edition sorts them to the bottom.

Third, Best Time order can be different in the case of matching Time and Altitude. This not an error; the two editions of the app simply sort 'ties' differently.