[sarex] Re: further late reply regarding ISS simplex

[Kenneth, N5VHO]

So one frequency up and down for SSTV, Packet, Voice,
PSK-31 and two for the crossband repeater. 

I think you need to go back to my posting regarding
the reason "theres been very little phone activity
from the ISS for many years"(regardless of the up/down
frequency scheme). They have other things to play
with. Only interested crew members get on now a days
and the rest are a horse lead to water issue.

Kenneth - N5VHO

--- McGrane <tmcgrane at suffolk.lib.ny.us> wrote:

> 
> Sorry kenneth but you totally missed the original
> point----- theres been
> very little phone activity from the ISS for many
> years and split seperate
> frequencies are an unneccesary incumberance to
> operation.
> 
> What good is split operation if the astronauts dont
> use it????
> 
> With simplex, maybe theyll leave the radio on for
> callers.
> That states my point simply.
> 
> pat
> 
> 
> On Fri, 11 Aug 2006, Kenneth, N5VHO wrote:
> 
> > Split operations allows everyone can hear the
> > astronauts talking back all the time.
> > 
> > Kenneth - N5VHO
> > 
> > --- McGrane <tmcgrane at suffolk.lib.ny.us> wrote:
> > 
> > > 
> > > 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 at AMSAT.Org
> > > [mailto:sarex-bounces at 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 less inclined
> > > > to leave the radio on to listen for callers. 
> > > > 
> > > > When there were several callers here on
> simplex
> > > responding to a CQ call
> > > > from the MIR, we acted civilized and took
> turns
> > > and everyone made
> > > > contacts so I dont buy the absolute need for
> split
> > > operation.
> > > > Besides, how many callers could there be
> within 20
> > > or 30 miles up to the
> > > > horizon.
> > > > 
> > > > We've had years of robot like amateur radio on
> the
> > > ISS. How about
> > > > loosening the ties!
> > > > 
> > > > Thanks for the soapbox..... pat
> > > > 
> > > > 
> > > > ----
> > > > Via the sarex mailing list at AMSAT.ORG
> courtesy
> > > of AMSAT-NA.
> > > > To unsubscribe, visit
> > > http://amsat.org/mailman/listinfo/sarex
> > > > 
> > > 
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> of
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> > > 
> > 
> > 
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> 


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