RE: [amsat-bb] Parise MIR KEPS

["Michael P. Olbrisch" <kd9kc@xxxxxxx>]

I posted my thoughts once before, but they seem to have
gotten lost for the last 2 days.  I had this problem
with NOVA and the MIR keps from Parise.  I noticed that
if I cut/paste the E-mail KEPS into NOVA, it would not
accept it.  I discovered that the name MIR had 3 trailing
spaces, like  MIR___  but when I delete the 3 spaces, it
works fine.  Just my observation.  Good luck.


Vy73,  Mike.  KD9KC.  MARS: AAV6EV
kd9kc@whc.net    -    kd9kc@amsat.org
Home  page:   http://www.qsl.net/kd9kc/

"People that are really very weird can get into sensitive positions and have
a tremendous impact on history."
     -- Vice President Dan Quayle

> -----Original Message-----
> From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org]On
> Behalf Of kd2bd@atc106.ml.org
> Sent: Friday, March 12, 1999 5:31 PM
> To: Paul Williamson
> Cc: amsat-bb@AMSAT.Org
> Subject: Re: [amsat-bb] Parise MIR KEPS
>
>
> Regarding the NASA TLE checksum method, Paul, KB5MU wrote:
>
> > It doesn't notice transposition of digits, it's easy to
> make compensating
> > errors, and even if you type in random garbage the check digit will
> > match 10% of the time.  Very poor design.
>
> However, you can check for things like a 'U' in the 8th column of the
> first line, the length of each line, decimal points and
> blanks that always
> appear in certain columns, and the '1' and '2' in the first column of
> the first and second lines to help distinguish a valid
> two-line element
> set from something else that might pass through based on a checksum
> calculation alone.
>
> Granted, it's not as robust as having a CRC to work with, but
> the extra
> checks help to prevent extraneous text from "slipping by the
> goalie".  :-)
>
>
> 73, de John, KD2BD
>
> --
> -=-=-=-=-=-=-=-=-=-=-=-=- John A. Magliacane, KD2BD
> -=-=-=-=-=-=-=-=-=-=-=-=-
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