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Yes, George, for sure I'm a spread-sheet illiteratus.

I opened your "noon2a.doc" of today and it looked different from your
"noon 1a" of a couple of days ago.

When I originally opened the earlier one with my Mac's word-processor
(TextEdit) a lot of the rows were interlaced. That's why I used your
spread-sheet. AppleWorks opened it right across the screen, which made
it comprehensible.

In re-studying your earlier noon document today, I now see the reason
for the different look: The top three rows  in "noon 1a" are
extra-long because they have "lat     long      knots" at the end, so
they went beyond TextEdit's margins and flipped to the next line. I've
just printed this document out and now it looks like the numbers
between the lines are the latitude, longitude and speed data for the
top two rows of sextant altitudes.

Assuming this to be true. what I now see I can do is use your altitude
data from the top two rows of altitudes in your "noon 1a" to figure
their resultant latitudes and longitudes and compare them to the
Lat/Lons you have at the ends of those two rows. I'll take those
latter two positions as DRs and go ahead if you like.

Hewitt



On 4/24/09, George Huxtable  wrote:
> Hewitt Schlereth and I are seriously at cross-purposes here.
>
>  He DOESN'T NEED a spreadsheet program! He wasn't intended to use a
>  spreadsheet program. That was provided just to allow anyone who was doubtful
>  about the way the data had been generated, to see what it was based on. I
>  regret having supplied it in the first place. Hewitt, forget the
>  spreadsheet, please.
>
>  All he needs is the table of altitudes-around-noon that has been attached to
>  various messages from me. I attach it again, to this message, as a .doc
>  document, noon2a.doc. Here, I have cut it down, from 20 sets of simulated
>  observations to just 8 sets, which should look a bit less daunting. It
>  should still be more than enough to give a general idea of the scatter. In
>  fact, I would prefer anyone who is still looking at this test to concentrate
>  on these 8 numbers rather than on the original set of 20.
>
>  For each, or any, of this set of 8 "noons", the test is to deduce the
>  original lat and long from which that row in the data set was created. In
>  each case it will be between N55�30' and N56�30', and between 9�W and 11�W.
>  The speed will always be around 10 knots Northerly, with a standard
>  deviation of +/- 1 knot rms, but you are not asked to deduce it.
>
>
>  George.
>
>  contact George Huxtable, at  george@hux.me.uk
>  or at +44 1865 820222 (from UK, 01865 820222)
>  or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.
>
>  >
>
>

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