Eric:

This is extremely useful.   I found some documentation on the site, re the
API.  I am way over my head here, but I need (for one) data on Lunar
Declination over, say, a year, but really month-by-month.  Is there a "for
Dummies" to get this data off of this server?  A cookbook?  Can I do
something like this?

grep -E 'oon&&eclin' >${tmpfile}

?

Thank you again.





On Wed, Nov 7, 2018 at 5:59 AM Eric S Fraga <esflists@gmail.com> wrote:

> Time for a very geeky post...
>
> Recently, on the remind (diary tool I used to use) mailing list,
> somebody posted a script for converting solar data (perihelion, equinox,
> ...) to remind input.  I've done the same for org so if you're
> interested in that kind of information and want your agenda to show
> this, here is the script:
>
> #+begin_src shell :results output raw
>   tmpfile=$(mktemp /tmp/date.XXXXXX)
>   for year in $(seq 2018 2068)
>   do
>       links http://aa.usno.navy.mil/seasons?year=${year} -dump | \
>           grep -E 'helion|quinox|olstice' > ${tmpfile}
>       while read -r line
>       do
>           item=$(echo $line | awk '{print $1}')
>           date="$(echo $line | awk '{print $5 " " $4 " " $3}') ${year}"
>           isodate=$(date --date="${date}" +"%Y-%m-%d %H:%M")
>           echo "** <${isodate}> $item"
>       done < ${tmpfile}
>   done
>   rm ${tmpfile}
> #+end_src
>
> Notes:
>
> 1. this is for Linux and assumes bash as the shell.
> 2. the default is UTC (and this is where I wish org supported time
>    zones...).
> 3. I believe the URL for the US Naval Observatory in the code above
>    accepts "?tz=N?dst=M" for different time zones (some index N) and
>    daylight savings options (M set to 0 or 1 maybe?) but I haven't
>    played with these options.
> 4. you will need to install "links".
>
> Enjoy but use at own risk etc. ;-)
>
> --
> Eric S Fraga via Emacs 27.0.50, Org release_9.1.11-620-ga548e4
>
>

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