PSN-L Email List Message
Subject: Re: Hekla volcano geophone planned
From: ChrisAtUpw@.......
Date: Mon, 7 Jan 2008 22:47:10 EST
In a message dated 08/01/2008, dickthomas01@............. writes:
Would something like the amateur communication system using computers here
in the U.S. be fast enough for you? And is it available to you? This is quite
a bit of automation associated with that setup now (within the software)..
Hi Tom,
Thanks for the thought. The basic problem is that my phone is about 12
km from the BT phone station. Even at the speed of light, the signal delay
would be about 40 micro seconds each way, so a transmit + ACK would be >80 micro
seconds assuming that the rest of the system were infinitely fast. This
delay severely limits the communication speeds when you are sending single bytes.
That way around it is to use a system which sends a large information
packet. However, I can just about cope at the moment.
Regards,
Chris Chapman
In a message dated 08/01/2008, dickthomas01@............. writes:
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something like the amateur communication system using computers here in th=
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U.S. be fast enough for you? And is it available to you? This is quite a b=
it=20
of automation associated with that setup now (within the=20
software)..
Hi Tom,
Thanks for the thought. The basic problem is th=
at=20
my phone is about 12 km from the BT phone station. Even at the speed of ligh=
t,=20
the signal delay would be about 40 micro seconds each way, so a transmit + A=
CK=20
would be >80 micro seconds assuming that the rest of the system were=
=20
infinitely fast. This delay severely limits the communication speeds when yo=
u=20
are sending single bytes.
That way around it is to use a system which sen=
ds a=20
large information packet. However, I can just about cope at the moment.=
=20
Regards,
Chris Chapman
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