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1993-12-28
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Documentation for SATUPDAT
by F6BVP
version 1.80e November 1993
SATUPDAT program will read messages from AMSAT copied via packet radio.
It extracts keplerian elements both in NASA and AMSAT formats and updates
the data into the satellites data base of the F6FBB's BBS file that should
be in the directory \fbb\system\sat\SATEL.DAT
Running SATUPDAT without arguments will print the following message on
your screen (between lines -----):
-----------------------------------------------------------------------
Automatic update of satellites orbital parameters for F6FBB's bbs
Version 1.80e - November 1993 - Bernard Pidoux, F6BVP
Usage: SATUPDAT [file name<.txt>] </option> </option> </option>
Reading option: /a AMSAT format (default)
/n NASA format
Update option: /f merging new and old data (default)
/u update only satellites being in the data base
/s keep only satellites being in the input file
Delete option: /dxxx delete data older than xxx days
(default xxx=100 days)
<<512 satellites maximum>>
-----------------------------------------------------------------------
Version 1.80 November 1993
==========================
This new version incorporates a new feature that deletes automatiquely from
the satellites data base, keplerian parameters older than a specified number
of days. Default is 100 days. This cleans the data base, removing decayed
satellites without sysop intervention.
Both AMSAT and NASA format checksum are verified, providing uncorrupted data
feeding of the BBS data base.
SYSOP information:
For automatic update of keplerian elements into F6FBB's bbs just create
a virtual BBS into BBS.SYS file. Its name could be AMSAT for example.
Then declare the following forward in the file FORWARD.SYS :
------
*
A AMSAT
*
G AMSAT
P @
C C:\FBB\SYSTEM\SAT\amsat.txt
*
------
CAUTION: The name of the disk unit and the path name should be the exact
one of your configuration.
In order to run automatically SATUPDAT when your computer boots, you must
modify the batch file like the following example:
:direct
rem horl /s
if not exist c:\fbb\system\sat\amsat.txt goto appel
cd c:\fbb\system\sat
satupdat amsat /n > satupdat.res
satupdat amsat >> satupdat.res
del amsat.txt
cd \fbb
:appel
echo Running the BBS ^C for stopping
sleep 3
serv -t
if errorlevel 2 goto direct
if errorlevel 1 goto suite
:suite
(Once again be carefull with the disk name and directories !)
SATUPDAT OPTIONS
================
The default extention for input file is .TXT, however you can specify
another extention.
Both arguments after the filename in the command line are optional:
the first one indicates the reading format, either the AMSAT format
or the NASA "2-line" format. The first one is selected by default.
The second option is for the choice of update mode.
By default the program will merge the old list with the new one (same
if you select option /f). Old data of satellites which are not present in
the input file are kept as is and the other one are updated.
Option /u can be selected if you dont want to add new satellites to the one
already present. Only keplerian elements from known satellites are updated.
This prevents the list to grow with incoming satellites that you are not
eventually interested in.
Option /s, on the contrary, gives you the possibility to keep only in the
data base the data from the satellites whose name is in the input file.
This can help you to suppress old satellites from the data base.
Option /d is optionnal. Default is 100 days. This means that the program
will remove data older than 100 days from the satellite data base, and
will not take into account keplerian elements older than 100 days from
the input file.
In all cases the program takes care of the permanent data of satellites
such as the frequency (for doppler) and the step for computing the
tracking (you must provide both manually only the first time).
If the keplerian elements of the input file are older than the one already
present in the BBS data base, the old one are kept.
The list is sorted by name in order to help finding of the satellite
name when someone is connected to the BBS.
If elements for one satellite are duplicated in the input file, the program
will look again for the newest data.
Of course, if CRC computed by the program is not the same as the one in the
input file, the program informs you that the CRC is BAD and it does not take
the keplerian elements.
In the batch file example given above you have certainly noticed that I call
twice the program SATUPDAT with two different format arguments. The first
time I ask the program to read the NASA format and the second time to read
the default format AMSAT. The reason is that the probability for an error
to occure in both formats for the same satellite is very small. Thus if an
error occurs in one format the program will complete the update when it founds
uncorrupted keplerian elements in the other format. Thanks to the checksum
adopted by AMSAT! The results of the update operation is written into the
SATUPDAT.RES file.
IMPORTANT NOTICE
A bug was found in the 5.13 FBB's BBS program which erases the catalog
number of the satellite when edited manually. This bug creates a problem
with the automatic access to satellite caracteristics documentation. This
is because the caracteristic file name is the catalog number of the satellite
plus the .SAT extension. To avoid this problem I provide a program called
EDISAT.EXE which allows editing the SATEL.DAT data base, until the bug is
fixed.
All remarks and suggestions will be appreciated by F6BVP.
73's de Bernard, F6BVP @F6BVP.FRPA.FRA.EU