[Moon-net] HB9BBD, DF2ZC, etc

[DJ5HG]

Dear Dominique, dear Bernd,

Dear EME community,


as a reply to some statements made on this 
reflector I want to express the following:

(1) It is a fact that the "modern correlation 
scheme" as used in JT65 deep search needs the 
prior knowledge of a limited set of possible 
messages. The amount of information that can 
be communicated with the usual list is less 
than half of that of a single callsign.

(2) The fundamental problem in a QSO is to get 
the knowledge what already has been received 
at the other end, i.e. at what stage the other 
station is. In a minimal QSO this meta-knowledge 
is one bit only. From each reception the operator 
must make the decision between "yes he got it" 
and "he did not get it or I don't know". 
If this one bit of basic information is sent 
via the internet, then the dialog is completely 
running on the internet while the radio path is 
used for a physical measurement and not for 
communication. As a consequence, any use of the 
internet in a time window around a radio contact 
clearly invalidates this contact as a QSO. This 
even is true if someone sends his "TNX for QSO" 
via the internet while the other is still sending 
the the final RRR.

The internet is a fine medium to communicate 
problems and solutions of our hobby, especially 
to help newcomers in EME. But an EME-QSO is a 
challenge. It should be a challenge to reach 
the requirements of a QSO, not to find ways 
to reduce the requirements.

There is a basic difference between identifying 
a signal and receiving information. What finally 
is written into the log clearly is information. 
I wonder if there is any doubt that all this 
information must be communicated via the radio 
path. 


73,

Klaus, DJ5HG