[sarex] Re: further late reply regarding ISS simplex

12 Aug 2006


      The UHF is located next to the VHF radio (Kenwood D700
is dual band).
I still don't see how one frequency will make the crew
leave their satellite communications, email, IP phone,
DVD movies, photography, book reading.... If they have
no interest in talking on the radio then they just
turn the volume down on the radio. If they are
interested, then they become sort of rare DX and
operate in the accepted split fashion.
Kenneth - N5VHO
--- McGrane tmcgrane@suffolk.lib.ny.us wrote:
...
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:
...
...
...
...
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
...
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
=== message truncated ===
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