Re: Problems with Skymap

Bjoern Gimle (b_gimle@algonet.se)
Tue, 11 Aug 1998 20:48:07 +0200

I rather think your config.sys/autoexec.bat uses too much memory.
If I run 'mem /C /P ' from a .bat file, it tells me the largest =
executable
size is 556k - this has been sufficient for my runs.
If you have less, REDUCING the default environment ( to 200?) helps
very little - you may have to use HIMEM, DEVICEHIGH and LOADHIGH
to make more free memory.
>     ...
>     Also, is there a step-by-step guide t Skymap. I *think* I =
understand=20
>     the documentation , but I'm not so sure. I want to list the=20
>     passes/objects at a certain location within a 15 minute window, =
and=20
>     then plot them to see what I might have seen.=20


No, there isn't, but I think you can get by with the old manual + change =
histories.
I agree with Luca Bertagnolio 'you just need some practice'
As with any large system, the options aren't there just to impress, they =
do
something to your results, and you need to know what to set good values.
And in most cases there is no particular order to work, you can jump =
back
and forth before you hit F10 on the main ( or the F7/F9 sub-) menu.
(One exception is the F3 Date/Time  F6/Increment and F7/Decrement -=20
they change many settings )

When you think you have some useful settings, save the .cfg (from Main
menu 'Esc') with a name to remember the purpose, like 'Identify_bright',
'Identify_faint', 'Predict_bright_evening', 'Predict_faint_now' ... =
and/or
particular directions and object groups. Use these as templates for
future runs, and use other names to save variants if you have to, until =
a
valuable improvement has been made.

For your 15-minute task, I would suggest that you set a suitable (faint)
star magnitude on F1/F8, a Stereographic view of small size on F4/F1=20
on F4/F4 (depends on your observing/note practices), faint labelled
stars on F4/F7, (and your coordinates on F2, preferred time zone
on F2, and F5 Satellite trajectory of course)

On F7 menu : Set the name of a large TLE file on F7/F1, your preferred
time system on F5, F7 Equatorial (if you use stars as reference).
On F7/L set Sunlit/No/Night/0.00, suitable magnitude limits ( 4 and 9 ? =
),
and No on F8.

On F7/F5 set 00:25 to allow for prediction/timing errors.
F1 will toggle automatically to Yes. F3/F4 will adjust to changes on
the F3 time menu. Set F6/F7 to high values ( 3000/15000 km?),
unless the object was very fast - higher if geosynchronous or so !
Set F8/F9 to low values ( 0/0 ?) and T to off
Specify a R(eport) file with a name similar to your .cfg file, which you
then create with returns to the Main menu and ESC to save it.

To use this .cfg file, L(oad) it from the main menu, or start SkyMap =
with
the file name as parameter or (best alternative) associate .cfg files
with SkyMap in Win95/Win31, or add a Shortcut to SkyMap in the SendTo
menu or edit in SkyMap as a new Action on the Show/File types menu.
Then you can just right-click or double-click on the .cfg file.

After that, change the F2/F1 Date and F2/F2 Time. If you use F6 (F7)
on the time menu, the F7/F9 date/time will also change, otherwise you
have to do that amnually. Set F4 to the object position or coordinates.
Go back to main menu with Return (save the .cfg under a new name
if you want to make different runs with the same date/time/pos later)
and run the search with F10.

The last section is usually all you have to think about each time you
want to ID an unknown next time. (Except of course changing your
home location to New Hampshire ;-)>  )