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Subject: Re: Sextant accuracy with short distance to horizon
From: Rodney Myrvaagnes (rodneym@XXX.XXX)
Date: Tue Jun 26 2001 - 09:48:18 EDT
On Mon, 25 Jun 2001 15:46:33 -0700, Dan Hogan wrote:
>>
>> That's interesting. But surely one must make an allowance for the fact
>> that the fence is not at the same altitude as the horizon.
>
>I can't remember that much about the post, but I THINK he had some kind of HE
>correction for his eye above the fence line.
>
He would need extremely accurate survey data if there was
any meaning to be had. He would have to know the relative
height of the fence and his eye, as well as the distance to
the fence.
If he already knew the exact location, and took sights
over a long period of time, he could eventually derive the
HE.
Rodney Myrvaagnes J36 Gjoa rodneym@XXX.XXX
Senior Editor Electronic Products
"Fireman saves pregnant squirrel" -- Arizona Republic, Dec. 14, 2000
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