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Further comparison shows that page 133 is a duplicate of page 139!

gl

On Nov 13, 1:56�am, glap...@PACBELL.NET wrote:
> Ken,
>
> My copy, 1970 edition, doesn't have the error you pointed out. I then
> looked at all pages from 122 through 161 looking at the first entry on
> each of these pages and found additional differences between my print
> edition and the online version. Page 155 has a one minute different Hc
> as �does page 151 for the first entry but I didn't check other values.
> page 133 is completely different, all tabulations are different ! I
> computed several of the entries on page 133 and found that the online
> version has the erroneous values while my 1970 edition has the correct
> values.
>
> gl
>
> On Nov 12, 4:08�pm, Ken Gebhart  wrote:
>
> > To all List Members,
>
> > Need help to track down errors!
>
> > I have been made aware of �many errors on page 158 of Pub 249 Vol 2 � �
> > Apparently all of the Hc values on the page are wrong! �For example, �
> > for dec 0, LHA 0, Lat 26 (page 158), Hc is shown as 65 deg. When it �
> > should be 64 deg by simple inspection. �All the other numbers are �
> > also off by varying amounts as can be found by computation. �There �
> > are some other errors too, of a different kind on other pages. �For �
> > example, page 160. �Look at the column for dec 15 deg, and go down to �
> > LHA 98. �By simple inspection you can see that there should be a �
> > minus sign before Hc 00-25, but it is not there. �I believe this is �
> > typical of many Hcs �near zero.
>
> > These errors are present in the US Government Edition, privately �
> > published editions, and the PDF on the NGA website. �I have spoken to �
> > the UK Almanac Office, and they report that the errors do not exist �
> > in their equivalent to 249 V2, or their Rapid Sight Reduction Tables, �
> > and can find no trace or knowledge of them.
>
> > I am asking anyone who has an older copy of this volume, to check it �
> > for these errors and report the publication date. �Maybe we can track �
> > down when they first appeared. �By the way, a friend did phone the �
> > NGA to report this, and was told that �they would look into it�.
>
> > Thanks, Ken Gebhart
>
>
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