Sun and Moon on compass dial
Posted: Thu May 02, 2019 10:25 am
Very often magnetic compass on phones give wrong results. Actually, in addition to very expensive military equipment, only electronic compass i could believe is on some Garmin handhelds.
Fast and intuitive way to check if compass gives correct results is drawing Sun and Moon on compass dial - if sun [moon] is where display draw them, then compass works OK, if not it needs a calibration.
Competitor already [actually from ancient times] have this [attached cropped screenshot], though only Sun.
Adding Moon is even more useful - at the night landmarks usually are not visible, and only way to know if compass works OK is position of Moon. Though, adding Moon is probably harder than adding Sun, - i couldn't find correct formula for Moon position [contrary to Sun] after hour or so searching.
PS
I know that AQ should warn user if compass needs calibration, but that works only if compass is "crazy", not for "ordinary" cases"
Fast and intuitive way to check if compass gives correct results is drawing Sun and Moon on compass dial - if sun [moon] is where display draw them, then compass works OK, if not it needs a calibration.
Competitor already [actually from ancient times] have this [attached cropped screenshot], though only Sun.
Adding Moon is even more useful - at the night landmarks usually are not visible, and only way to know if compass works OK is position of Moon. Though, adding Moon is probably harder than adding Sun, - i couldn't find correct formula for Moon position [contrary to Sun] after hour or so searching.
PS
I know that AQ should warn user if compass needs calibration, but that works only if compass is "crazy", not for "ordinary" cases"