Re: TLExtract version 3.0

From: John Gerrard via Seesat-l <>
Date: Tue, 20 Feb 2018 08:24:12 +0000 (UTC)
Dear Marco Langbroek
Thank you for your great software. I think, adding a filter to extract geo satellites that are within two given longitudes, will improve your software's capabilities.
Best RegardsJohn Gerrard    On Monday, February 19, 2018, 9:34:03 PM GMT+3:30, wkitty42--- via Seesat-l <> wrote:  
 On 02/18/2018 06:54 PM, Marco Langbroek via Seesat-l wrote:
> Hi all,
> By popular request, version 3.5 now allows to select on catalogue number as well.

your tool sounds very much like one i wrote to replace Orbitel in my workflow... 
Orbitel is memory limited for today's TLE lists and there won't be any fix... 
R.I.P. Dave Ransom... like Orbitel and your tool, my tool takes a list of TLEs, 
merges them all together and outputs the results by whatever criteria you desire 
based on their data... the main thing, if not allowing duplicates, is to keep 
and use the newest TLEs for processing...

the tool also offers XRF (cross reference) like Orbitel does/did so that your 
output file can contain your preferred common names for the objects instead of 
some "cryptic" id assigned by others... in addition to XRF, it also uses Dr. 
Jonathan's satcat list for similar naming capability...

  eg: 07530 has several common names... use the one you like...

  OSCAR 7 (AO-7)

additionally, the satcat is used to identify known/unknown objects and 
orbiting/non-orbiting objects... objects that are "unknown" are simply not 
listed in the satcat file... they are marked with an '_at_' as the first character 
in their output common name... down objects, as indicated in the satcat file 
"REENTERED" or similar, are marked with an '!' as the first character in their 
output common name...

  _at_Explorer 1        <- unknown object common name
  !Explorer 4        <- non-orbiting object common name

for fun, here's an example of one of my processing commands...

satsort32 -l logs/geosync.log -o geosync.3le -i -c -u 
--mmotion=0.99,1.01 --eccen=0,0.01000001

it creates an output file of objects that have a mean motion between 0.99 and 
1.01 that also have an eccentricity between 0 and 0.01000001...

there's also SEL files like Orbitel has/had... they restrict processing to only 
the objects listed in that SELection file... this allows you to slice and dice 
your input while restricting it to only a specific SELection of objects... eg: 
use the CLASSFD.SEL to limit the above geosync.3le to only those objects in the 
classfd list... this would be if you maintain a large central tle list (aka 
database)... sure, you could use classfd.tle as the input instead of 
as above... this gives you another way to do the same thing ;)

don't be confused by the executable's name, satsort32... 32 was initially used 
to differentiate from 16bit like Orbitel but the program compiles on OS/2 32bit, 
linux 32bit, linux 64bit and it should also compile on winwhatever 32bit and 
64bit... i haven't a winwhatever box to test with any more, though...

future plans call for allowing for outputting TLEs for craft that will fly over 
a certain longitude and latitude over a certain time frame... it isn't a GUI 
tool but that may change if i can ever figure out GUI programming ;)

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Received on Tue Feb 20 2018 - 02:26:05 UTC

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