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LW2EIQ > SAREX 04.07.96 02:39l 41 Lines 1597 Bytes #-10885 (0) @ AMSAT
BID : 17068LW2EIQ
Read: DG7RO GUEST OE7FMI
Subj: Re: shuttle-to-Mir
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Sent: 960701/0309Z @:LW2EIQ.7600.BA.ARG.SA #:17068 [GF12FA] $:17068_LW2EIQ
From: LW2EIQ@LW2EIQ.7600.BA.ARG.SA
To : SAREX@AMSAT
>At 10:43 PM 6/29/96 -0400, Philip Chien wrote:
>
>>What's interesting t speculate is whether or not there have been any
>>*accidental* shuttle-to-Mir contacts. It would have to be one-way because
>-way because
>>of the frequencies normally used. Consider - the shuttle transmits on
>>145.55 when it's doing random QSOs. Mir receives on 145.55. It's quite
>>conceivable that on a mission like the current shuttle mission (STS-78)
>>with a bunch of shuttle-Mir conjunctions that the Mir cosmonauts may
>>accidentally hear the shuttle when they turn on their radio!
to which Gregory S. Williams (KE4HSM@ix.netcom.com) replied:
>Well, couldnt the shuttle crew simply turn the offset off?he offset off?? Or the Mir
>turn theirs on???
>
>quick thought...
Hmm, the problem there is that you'd have Mir or the shuttle in the middle
of the pileup trying to get through with everybody else!
I think you missed the point of my message Gregory. I'm not saying that
the accidental contact is desirable - actually you could think of it as a
form of interference - two hams accidentally using the same frequency at
the same time. But it would be interesting to hear if Shannon ever
accidentally heard the shuttle calling out to people on the ground ...
See other postings from me about times when direct ship-to-ship contacts
were attempted and accomplished. In each of those cases the
astronaut/cosmonauts knew about the conjunctions and were trying_ to make
contact, and used a separate simplex frequency to avoid the 145.55 rush
hour.
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