NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Z tangent formula
From: John Simmonds
Date: 2005 Jul 8, 21:01 +1000
On Thu, 7 Jul 2005 20:04:46 +1000, Peter Fogg wrote:
>?________________________________________
>?From: John Simmonds
>
>>?Actually, I would suggest that the Sharp nav calculator uses the
>>?same formula, truncated to 1 decimal place :)
>>
>
>?Which same formula?
>
>?I would expect that any shortened values would result from
>?rounding: ie, the closest value being adopted. This does not seem
>?to be happening for 2 of the 3 samples.
From: John Simmonds
Date: 2005 Jul 8, 21:01 +1000
Tan Z = sin (hour-angle) / (cos (hour-angle) sin lat - cos lat tan dec)
On Thu, 7 Jul 2005 20:04:46 +1000, Peter Fogg wrote:
>?________________________________________
>?From: John Simmonds
>
>>?Actually, I would suggest that the Sharp nav calculator uses the
>>?same formula, truncated to 1 decimal place :)
>>
>
>?Which same formula?
>
>?I would expect that any shortened values would result from
>?rounding: ie, the closest value being adopted. This does not seem
>?to be happening for 2 of the 3 samples.