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Ken,

You should also look at the "Error to Printed HO 249 Volume 2 " thread
on October 20, 2008.


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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