David Higgins Jun 1, 2003
--- In guide-user@yahoogroups.com, Bill J Gray <pluto@p...> wrote:
> Hi David,
>
> Errrmmm... my apologies; 'mpc_stat.dat' is used for _display_
> of the MPC stations as a user-added dataset. Toggle that dataset
> on and hit ':', and zoom in near Canberra, and E14 (and several
> other nearby stations) will appear.
>
> For the "enter location name", Guide relies on the
file 'stations.txt'.
> And that dates back to when the Guide 8 CDs were made, and
> lacks the new non-numeric codes. Download this:
>
> http://www.projectpluto.com/stations.txt
>
> and entering E14 will work.
>
> Oliver, when you hit ':', Guide first looks for the nearest
new moon.
> The reason for this is that you can set the approximate date of an
> eclipse, while perhaps being a day or two late; then hit ':',
and
> Guide will find the event anyway. Similar concerns arise for
> conjunctions; if you happen to note that an asteroid is near a
> star, you want Guide to "find the conjunction", even if it's got
> to back up a few days to do it.
>
> After hitting ':', use of 'next eclipse' or 'prev eclipse'
will get
> you to any desired event.
>
> More generally, I get the idea you were looking for a way to
> enter geographic mode without concern for eclipses of any sort.
> I've thought about adding such a function for several non-eclipse
> related purposes:
>
> (1) Enter this mode, zoom in on the chart, and say: "This is
> my observing location." In some ways, this is simpler than use
> of city names, or MPC codes, or entering latitude/longitudes,
> or entering a US postal ZIP code (all of which Guide supports).
> Right now, you can do this by hitting ':', zooming in on the
> observing location, and using "Extras... Set Lat/Lon from chart."
> Not a bad thing, but it's hard to see why you should have to
> show a solar eclipse in order to set your observing location.
>
> (2) Display of the currently-illuminated half of the world.
Possibly
> combined with display of the regions where a given event is
> currently above the horizon. You might see that "there was
> a gamma-ray burster at _this_ RA/dec at this time", set that
> RA/dec and time in Guide, and then have Guide show you where
> that event was above the horizon and seen in darkness. (This
> would also lead nicely to display of regions in which lunar
> eclipses are shown... though I do have a little freeware program,
> http://www.projectpluto.com/luneclip.htm , devoted solely to
> that purpose.)
>
> (3) Display of artificial satellite tracks. This would
probably
> work a bit the way the current "Animation... Add a Trail"
> function does, except that after making such a trail for
> a satellite, showing its path through the sky over a given
> time span, you could go into "Geo" mode and see its
> path over the earth for the same time span.
>
> (4) Simply for use as an "atlas". Not a really good or
> detailed atlas, I admit, but you could use it for one.
>
> -- Bill