[sarex] Re: further late reply regarding ISS simplex

12 Aug 2006

      good try but no cigar! I'm writing about 2 meters VHF where there is very
little doppler and higher power. But with all due respect, where is the
UHF radio located and is it left on?
Maybe we should make some coffee HUH?
pat
On Fri, 11 Aug 2006, Kenneth, N5VHO wrote:
...
Oh, I forgot that we do have a simplex frequency the
ISS uses. 437.55. Problem solved.
Kenneth - N5VHO
--- McGrane tmcgrane@suffolk.lib.ny.us wrote:
...
Then take it up with the russians and get their
opinion.
bantor the idea about. As it is, theres very little
phone activity, and
maybe, just maybe, if we call them, they might pick
up the mike.
Thanks if you consider the change. 
pat
On Fri, 11 Aug 2006, Kenneth, N5VHO wrote:
...
Who did you have in mind to "have their way with
the
...
space program"? Doesn't seem to be to many other
folks
...
running ham radio in their manned space programs.
One group is the Russians who have a lot to do
with
...
ham radio being on ISS. It is after all not
located in
...
the USA segement but the Russian Segment of the
ISS.
...
Kenneth - N5VHO
--- McGrane tmcgrane@suffolk.lib.ny.us wrote:
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Hi bob- You must live in a bad area. My fellow
amateurs always quieted
down when they heard an astronaut calling
someone.
...
...
Seems like you and NASA
are pretty set in your ways. Dont you think its
time
...
...
to let some others
have their way with the space program?
I remeber an joke I heard years ago; NASA spent
a
...
...
million dollars to
develop a pen that would write in zero
gravity......
...
...
the russians used
pencils.
I see no open-mindedness here. pat
On Fri, 11 Aug 2006, Robert Bruninga wrote:
...
...
Hello again- the astronauts will hear
everyone
...
...
calling
...
...
whether its split or simplex operation so
why
...
...
not make it
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simplex!
Because many of us live near inconsiderate
operators that step
...
all
Over the downlink by transmitting on the
uplink.
...
...
Simplex is
...
just not a good idea.
The downlink should be separate from the
uplink so
...
...
that everyone
...
can hear the downlink without interfererence
from
...
...
uplink
...
stations.
Bob
...
-----Original Message-----
From: sarex-bounces@AMSAT.Org 
[mailto:sarex-bounces@AMSAT.Org] On Behalf
Of
...
...
McGrane
...
...
Sent: Friday, August 11, 2006 7:43 PM
To: Kenneth G. (JSC-OC)[BAR] Ransom;
bruninga@usna.edu
...
...
Cc: Manned space BBS
Subject: [sarex] Re: further late reply
regarding ISS simplex
...
...
Hello again- the astronauts will hear
everyone
...
...
calling
...
...
whether its split or simplex operation so
why
...
...
not make it
...
simplex!
...
pat
On Fri, 11 Aug 2006, Ransom, Kenneth G.
(JSC-OC)[BAR] wrote:
...
...
> It sounds like your issue is not that
split
...
...
frequencies are
...
bad but
...
> that multiple uplinks makes it difficult
for
...
...
the crew to
...
...
listen to one 
> uplink. ITU region regulations for ground
station
...
...
operations are the 
> culprit. Space has no borders but Earth
does
...
...
so have of the
...
...
problem is 
> getting everyone to agree on a single
uplink.
...
...
Not everyone
...
in the
...
> world has the same frequency allocations
nor
...
...
do they use
...
...
the available 
> spectrum in their region the same way.
> 
> The issue is not the 20-30 miles but the
number of callers
...
...
in the 2000 
> km wide footprint. The station has to
listen
...
...
to all of
...
...
them. Since you 
> can't hear all of them, it becomes
difficult
...
...
to know when
...
...
someone is 
> talking or not without guidance from the
station operator.
...
...
> 
> In the MIR days, the crew did not have the
luxury of near
...
full time
...
> satellite communication that provides
voice,
...
...
email
...
...
communication and 
> an IP phone that lets them make phone
calls.
...
...
If the MIR
...
...
crew wanted to 
> talk to someone, they needed to use the
ham
...
...
radio or the
...
...
Russian VHF 
> space to ground system. The ISS crew has
plenty of options
...
...
to choose 
> from when they want to communicate and it
depends on the
...
...
personality 
> of the crew as to which ones get utilized.
> 
> Kenneth - N5VHO
> 
> -----Original Message-----
> From: sarex-bounces@AMSAT.Org
[mailto:sarex-bounces@AMSAT.Org] On
...
> Behalf Of McGrane
> Sent: Thursday, August 10, 2006 6:43 PM
> To: Manned space BBS
> Subject: [sarex] further late reply
regarding
...
...
ISS simplex
...
...
> 
> 
> Greetings from patrick N2OEQ
> 
> Despite support of the present frequency
scheme for the ISS
...
I still
...
> wish to disagree with the policy of split
operation with
...
different
...
> phone uplinks.
> 
> Back when the MIR was up, the russians
operated simplex and
...
...
left the 
> radio on to listen for callers.
> On several occasions, I called the MIR
according to my
...
tracking
...
> program and was rewarded several times
with a
...
...
response.
...
...
> 
> With two different uplink frequencies, the
astronauts are
=== message truncated ===

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