-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Ok, so I'm slow to chime in, but being an old Unix guy I wanted to share this piece to make it easier if you have access to a *NIX system, a Linux box, or a Windows system with the "unixtools" package. This simple command-line script will show the sorted list of objects from oldest to newest in any TLE file: grep '^1' classfd.tle | cut -c3-8,18-32 | sort -k2 -n The script reads "get every line starting with a one at the beginning from classfd.tle. Pipe this into `cut` and print the characters in positions three through eight and 18 to 32. Pipe this into `sort`, using the second field and sort on it numerically." While the full file currently has 280 vehicles in it, this is the beginning of the output. It is from Mike McCants' classfd.tle from 0500 16 March 2008 CDT, and represents the very oldest 14 vehicles in the file: 90059U 06320.93910488 11852U 07037.75716387 90061U 07048.80870443 90057U 07061.96014410 90047U 07130.72731785 14139U 07163.64774262 30588U 07224.01907183 90062U 07240.48781203 90076U 07261.14212025 90020U 07306.84635606 26356U 08066.83903380 96027U 08098.39106334 96085U 08100.69892177 90080U 08181.08833312 This shows some vehicles are probably going to be quite challenging to recover since their last updates were at the end of 2006 and the early part of 2007. Of course, this doesn't distinguish between LEO, MEO and GEO vehicles. The formulas given by Greg Roberts in his recent message "Re: OT: Orbital Radius / Semi-major Axis" might be of use here, but numeric processing in the shell means a bigger script. :) The "unixtools" package for Windows systems will allow the above: http://unxutils.sourceforge.net/ I'm pretty sure that the Command Line in Windows will allow stringing together multiple pipes without complaint. John Derek C Breit wrote: > I should have been a bit more long winded in my explanation of how to select > what to observe. After you have combined the CLASSFD.TLE, INTTLE.TLE and > INT96.TLE files have a look at the high objects in CLASSFD.TLE to see when > they were last observed. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFJvy8J9ZbI0D1bQpkRAkyzAJ9GCkr0njRXYjM9bbcJE/7gbQ8H/wCgnzLf nVXY/kN670sRemB7d6pVRxo= =yiNR -----END PGP SIGNATURE----- ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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