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nasaprep.doc
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1990-07-30
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NASAPREP.EXE - Prepares the NASADATA.ORB file for use with NASAORB
Background - The SATEQ program needs to be loaded with data for each
satellite. This data is distributed by NASA in a standardized format,
which SATEQ cannot read, so to save the effort and errors involved in
entering the data by hand, the conversion program NASAORB was created.
However, this program required the user to pre-edit the NASA data
file, again required effort and possible errors by the user. NASAPREP
is a preprocessor for NASAORB.
NASAORB expects to read a file called NASADATA.ORB, and produce a file
called SATKEPN.DAT, which is loaded by SATEQ. Therefore, NASAPREP
will output a file by this name. NASAPREP uses a config file call
SATNAMES.ORB that you create. This file is a list of the birds you
want out of NASADATA.ORB file. The SATNAMES.ORB file also lets you
rename the bird, as names like 1990 005H are hard to use. Here is a
sample SATNAMES.ORB file:
"OSCAR 10" "OSCAR10"
"RS-10/11"
"AO-13" "OSCAR13"
"Mir"
"GOES 2" "GOES2"
The first name is the name exactly as it appears in the NASADATA.ORB
file. The second name is the alias that you want it renamed to.
What NASAPREP will do:
1. Check NASADATA.ORB to see if it NASAPREP has ever been run before.
If it is the first time, it will copy it to NASADATA.SAV.
2. It will read SATNAMES.ORB to load up your list of names and
aliases.
3. Read NASADATA.SAV and output the selected ones to a newly created
NASADATA.ORB file.
4. Run NASAORB to process the newly created and edited NASADATA.ORB
file which will create the data file for SATEQ.
Messages will appear on the screen to tell what's being done. A list
of any birds that were in the satnames file but were not found in the
NASADATA will also be displayed. You can save the messages in a file
if you need to read them all by redirecting the stdout to a file.
e.g. NASAPREP >msgfilename