Expedition Expedition Navigation Software

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2/11/2020 5:24 am  #1

WMM and historic routing

Wondering if there's a way to import/specify a WMM file, and separately, if the WMM impacts the routing algorithm? 
I ask because as we analyse reanalysis data for previous races, and want to find the routes that would have resulted at that time, I want to make sure using a newer WMM won't have too much impact on the results. 

The WMM could have big differences, especially near the poles, but if it isn't used by the routing algorithm then it obviously doesn't matter. 


2/11/2020 1:57 pm  #2

Re: WMM and historic routing

WMM? World Magnetic Model?

if so, if doesn't have any bearing on the routing - all grib data, Exp calculations etc are in true


2/12/2020 6:33 am  #3

Re: WMM and historic routing

Yeah world magnetic model. Good to know, thanks!

     Thread Starter

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