Greetings All:

After consultation with a number of peers I propose the following as the
minimum for a QSO validation over the North Atlantic on LF.

Step 1     M0BMU VA3LK                    va3lk sending
Step 2     VA3LK M0BMU O                m0bmu sending
Step 3     RO O                                      va3lk sending
Step 4     RO                                          m0bmu sending
Step 5     E E                                         va3lk sending
Step 6     E E                                         m0bmu sending


I used Jim's call for example purposes only

The timing, 15 minute windows etc, is independant of this process

Explanation
Step 1, va3lk sends continuosly calls m0bmu
Step 2, m0bmu has seen the Step 1 and responds with full calls and sends "o"
Step 3, va3lk has seen the full calls and the "o", acknowledges the "o" with
"ro" and send and "o"
Step 4, mobmu sees the "ro" which acknowledges the "o" sent in step 2, and
sends and "o"
Step 5, courtesy, va3lk acknowledges the "ro" and signs off with "ee"
Step 6, courtesy, mobmu acknowledges the "o" and signs off "ee"

There are more or less 250 bits of information in this exchange, with 90
second dits the process is just over 6 hours to send.  A more advanced
coding schema is needed to compress this information exchange into about 2
hours or less.

va3lk will present a novel FSK schema to accomplish this requirement asap.

Every effort has been made to first minimize the number of bits exchanged
but to also ensure that the basic minima for a valid QSO in the minds of a
large number of radio amateurs has been maintained.

Comments issues etc to myself please.

Larry
VA3LK