Btw THAT was indeed the fix (changing the 6/5 into 2/3) !
Henk ---- Ryan Caron <rca...@gmail.com> schreef: > The O/OREOS TLEs consistently do not have valid checksums (last digit of > each line). I submitted a comment about this on their website but I have > not heard back. The correct checksums are 2 & 3, and not the 6 & 5 that > is listed. > > If, by the time you read this, the posted TLEs are not 6 & 5, then the > TLEs have been updated and you'll have to generate new checksums. The > formula is a sum of all numerical characters on the line, including the > line number, treating minus signs as a one and everything else (letters, > +, spaces) as a 0. Then take modulus 10 of the sum (i.e. last digit of > the sum). Look it up on wikipedia for more details. > > I've made a spreadsheet to fix this, but it is still a manual operation > for me (got to write a script at some point). Some programs disregard > the the checksum, which is why HRD & the website still work and your > tracking tool doesn't. Predict/GPredict, my tools of choice, require > valid checksums, making proper TLEs a pet peeve of mine. I don't know > what NOVA's up to. > > In terms of "swarm spread" (i.e. how small delta-V between spacecraft > that shared the same ride, which in this case is just done by compressed > springs, translates into spatial differences), 35 minutes of separation > is pretty high for just 10 days after launch. With all the latest TLEs > from the three websites, I show O/OREOS being 3.5 minutes ahead of RAX, > and RAX being a 1.33 minutes ahead of FAST1/2. > > Ryan, KB1LKI > > On 11/30/10 4:54 AM, amsat-bb-requ...@amsat.org wrote: > > ------------------------------ > > > > Message: 4 > > Date: Mon, 29 Nov 2010 22:55:16 +0100 > > From: PA3GUO<pa3...@upcmail.nl> > > Subject: [amsat-bb] O/OREOS TLE errors ? > > To:amsat-bb@amsat.org > > Message-ID:<19767175.1291067716437.javamail.r...@viefep21.chello.at> > > Content-Type: text/plain; charset=utf-8 > > > > Dear all, > > > > I keep on having troubles with the O/OREOS kepler sets. > > RAX and the others are fine. > > > > With todays version (as from the O/OREOS dashboard on the web) > > - NOVA gives O/OREOS just a bit behind RAX > > - HamRadioDeluxe give O/OREOS 35 minutes behind RAX > > - The O/OREOS web (dashboard graphic) shows O/OREOS 35 minutes behind RAX > > - My private antenna tracking tool does not recognize the keplerset of > > O/OREOS > > > > Anyone else has experienced this (and maybe even a solution) ? > > Henk > > -- > > Henk, PA3GUO > > -- Henk, PA3GUO _______________________________________________ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
