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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Longitude
From: Bill B
Date: 2013 Jun 29, 13:52 -0400
From: Bill B
Date: 2013 Jun 29, 13:52 -0400
On 6/28/2013 9:58 AM, Antoine Couëtte wrote: > For fun, I do not see much of a difference between you averaged heights > value (104°40'28") and the one I quoted, i.e. 104°40'48 (better > transcript 104°40.48') which is the same as ... 104°40'28".8) :-) > Of interest (to me) was the the .8 difference. I know my $10 TI 30XA does not pass the Meeus test of squaring 1.0000001 27 times. Mine calculates 674514.8688 rather than 674530.4707. This is equivalent to HP-85 or HP-48s performance. Typically I don't use any more figures than needed when averaging times or Ho's. In this case single degrees. For some reason I used all three degree figures and obtained the above. The TI-30XA has a ten character display, and that used all ten. Out of curiosity I went back and used only one degree figure (3, 4 or 5). Here I did obtain 4°40'28".8. I was surprised to learn the TI truncated the last figure on the display rather than rounding up. Live and learn. Bill B
