[Therion] Magnetic declination

[Philippe Vernant]

Hi Martin,

Just to be sure, but I guess you already know it, you also have to enter the coordinate for the calculation of the declination. 

Phil


> On 02 Mar 2018, at 17:22 PM, Martin KERN via Therion <therion at speleo.sk> wrote:
> 
> Thanks for your reply Ladislav.
> 
> I know that but the automatic declination is calculated for the first januray of the year which is enter, not for the exact date.
> It's not a probleme for the accuracy of the survey ? 
> 
> Martin K. 
> 
> Le 2 mars 2018 17:05, "Ladislav Blažek" <ladislav at lblazek.cz <mailto:ladislav at lblazek.cz>> a écrit :
> Hi,
> 
> declination should be calculated automatically based on the survey date.
> Declination parameter is for manual correction.
> 
> \LB
> 
> 2. 3. 2018 v 16:29, Martin KERN via Therion <therion at speleo.sk <mailto:therion at speleo.sk>>:
> 
>> Quick question concerning the magnetic declination.
>> 
>> How you indicate it?
>> 
>> Just by entering the date or with the command <declination>?
>> 
>> Because when I just specify the date, the declination which is calculate is for the first January, even if I specify another month in the centreline (e.g. 28.08.2017). Consequently, centreline is slightly offset that if I enter the real declination for the date.
>> 
>> I don’t know if this shift is important for survey accuracy or if I can ignore it ?
>> 
>>  
>> Thanks and sorry for all my questions.
>> 
>> Martin K.
>> 
>> 
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