Hi Pete,

Simplest thing to do would be to download

http://www.projectpluto.com/grs_lon.txt

(about 10 KBytes) to your Guide folder, overwriting an existing copy.
I just updated this to include the most recent Jupos observations, with
an assumed drift of 14 degrees/year.

If you're curious about why the GRS longitude is handled this way,
rather than asking the user to enter a value, the bottom of 'grs_lon.txt'
will tell you more than you ever wanted to know.

-- Bill

On 04/03/2014 08:45 PM, petegladstein@... wrote:
>
> GRS is now 212. How do I update Guide 9? Thanks.