Re: Quicksat

John C Sellechio (johnsellechio@juno.com)
Wed, 08 Jul 1998 17:11:12 EDT

On Wed, 08 Jul 1998 16:34:04 EDT andromedus@juno.com (Jason E Felton)
writes:
>Hi
>	I have just downloaded Quicksat.  I entered Quicksat.exe and 
>the ms-dos screen came up and it said "finished" at the top.  Thats as 
>far as I can get into the program.  Can someone help me with this 
>problem?
>Jason Felton     Andromedus@juno.com
>__________________________________________________________________


Jason,

Running Quicksat for DOS takes several steps.

The first thing you need to do for Quicksat is to download an element
file and save it into the same directory that contains QUICKSAT.EXE. 
(Name it as a TXT, DOC, or DAT file).

Next, open QUICKSAT.CTL (in Notepad or in MS-DOS editor) and set up the
data fields similarly to what I have done below:

*********************
1998 7 Year, month number
05 13 Start date, end date
-1 +1   Start time, end time, "A" flag
41.709  71.386  10 Warwick, RI 
-4 EDT 12 correction for UT to time zone, time zone name, 12/24 flag
2000 Epoch of predicted RA, Dec
6.5 Magnitude limit
15 Altitude cut-off value
1.0 The search/step parameter value
T True means store all elements in memory (limit 2000)
T True means accept only the most recent elements for each object
F True means ignore shadow test
T  2 True means generate multiple prediction points, how many each way
T True means output distance values in miles
T True means generate a blank line before each object's prediction.
           Up to 5 non-blank flags to select class(es) of objects
A        Output format flag, R/P option, D/C/N option, Azimuth option
quicksat.mag      Intrinsic magnitudes input file
output.out        Output file
mir.dat      Elements input file
EOF               End of input file list
****************************

As you can see, the first two lines tell the program the dates that you
wish to calculate the predictions for.  The fourth line tells the program
your location in latitude, longitude, elevation, and name.  The fifth
line tells the program your time correction.  The second line from the
bottom tells the program the name of the file that contains the element
set that you downloaded (in this case, the element set is MIR.DAT). 
Finally, the third line from the bottom tells the computer the name of
the file where it should record the computed predictions.  The meanings
of the other lines can be found in the file QUICKSAT.DOC.

Then you run the program by executing QUICKSAT.EXE.  You will not see any
results on the screen.  When it finishes, open the output file with a
text editor such as Notepad or MS-DOS Editor.  Then you will finally see
the results of the program's predictions.

This is an awful lot of work.  I ended up writing a batch program so that
all these steps can be taken care of fairly automatically and I've found
that it is a very accurate prediction program (and a great workout if
your a DOS-ophile!)

You can write to me personally if you have any more questions.

...John C. Sellechio


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