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Re: further late reply regarding ISS simplex



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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