posted on Apr, 5 2017 @ 09:37 PM
ok - purely as an exercise in thinking
" post pole shift " calculations - my opinions
1 - the sun // polaris [ assuming northern hemisphere ] - will in a single day [ assuming clear skies ] - allow you to determine - " true north "
do NOT use a compass at this stage - only use a map , a watch // clock [ assuming you trust it to be accurate ] and known land marks - to determine
if polaris really is still above the true north pole - and if the sun really is " due south " at local noon [ bonus if you have an almanac that gives
the suns rise // set bearings ]
2 - now use a compass to determine the difference between the " new " true north and the magnetic pole
the reason you need to do it in 2 stages is - that you have no a-priori way of knowing if the earths axis of rotation [ true north ] has changed
independantly - the magnetic pole has changed independantly - or both have " suffered " a different degree of shift
i hope thats clear
- will attempt to put up graphics later
but for now - critique ? - can it be done simpler ????
edit on 5-4-2017 by ignorant_ape because: (no reason given)