[Spooks] Check Sums?

[Swartz Robert]

Brooke,
 
Good question.  One would have to copy a number of messages from the same station and examine the 
 
groups to see if they sum to a particular value;  in the fourth group of each message, the first three numbers 
 
always sum to the fourth digit,   or the twentieth goup is always the group count.  Would defiantely require
 
a lot of ful copy over a period of time.
 
 
Bob Swartz

________________________________

From: spooks-bounces at mailman.qth.net on behalf of Brooke Clarke
Sent: Thu 6/30/2005 6:25 PM
To: Shortwave Spy Numbers Stations
Subject: [Spooks] Check Sums?



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Hi:

Do any of the numbers stations send a check sum, parity, CRC, etc. that
works on the characters as sent?  The idea would be that the recipient
of a message could calculate the check prior to decoding to be sure that
the message was received correctly.

73,

Brooke Clarke, N6GCE

--
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