Re: [sarex] Human spaceflight ham frequencies

["Jim R." <smokesigs@xxxxxxxxxxx>]

Will Marchant wrote:
 > 
 > Yes, an HF antenna will be installed on the outside of the ISS during a
 > spacewalk on STS-101 in December.  Transceivers to utilize that
 > capability will be flown after 2000.  We probably won't be able to do HF
 > from the EXPRESS Pallet because of restrictions on what can protrude
 > outside of our payload envelope.
 >         73,
 >         Will
 > 
 > eric.vandeweyer@au.unisys.com wrote:
 > >
 > > Hi everyone,
 > >
 > > I'm just going to throw another thought into the melting pot.
 > >
 > > What about HF on ISS?
 > >
 > > It it possible or not?
 > >
 > > It could provide some interesting experiments especially as to propagation over
 > > the horizon from space. We already have sats which use HF e.g. RS-12/13 using
 > > 10m & 15m and others with downlinks on 10M but two-way comms with the ISS would
 > > be interesting on, say, 10M and there should be adequate room there to provide a
 > > window for ISS operations.
 > >
 > > What do others think of this idea?
 > >
 > > As I said, just a thought.
 > >
 > > 73....Eric VK2KUR
 > >
 > >    -----Original Message-----
 > >    From:   Will Marchant <kc6rol@AMSAT.Org>@UNISYS
 > >    Sent:   Thursday, 12 August 1999 7:42 AM
 > >    To:     smokesigs@baraboo.com
 > >    Cc:     sarex@AMSAT.Org
 > >    Subject:  Re: [sarex] Human spaceflight ham frequencies
 > >
 > >    (Embedded image moved to file: pic21964.pcx)
 > >    Exactly right, Jim!  We had talked about having an automated system that
 > >    would switch frequencies based upon the orbital position of the ISS.
 > >    What a nightmare!  Plus it won't really solve the problem because of the
 > >    huge field of view of the satellite.  How do you handle a southerly pass
 > >    over the United States when the ISS sees the USA, Mexico, and South
 > >    American countries?  They all have different band plans.  The same
 > >    problem happens over the other continents.  The frequency switching idea
 > >    cannot work.  8(
 > >
 > >    I'm afraid that we will have to live with "crummy" frequencies in the
 > >    VHF and UHF bands.  That is unfortunate because everyone is committed to
 > >    providing an "easysat" capability to allow for easy entry by beginners.
 > >
 > >    There is much more flexibility at the higher frequencies.  The
 > >    disadvantage is the Doppler...  And the fact that most of that gear
 > >    needs to be homebrewed.  Hopefully that will encourage a lot of people
 > >    to expand their skills...
 > >
 > >    The problem is sufficiently complicated that I've backed away from it.
 > >    I'll continue to push for hardware that will support many bands and
 > >    modes.  Frank and his partners in the international ham community will
 > >    need to decide what the ISS crews will be allowed to use...
 > >    Fortunately, there are a number of dedicated ham volunteers in the
 > >    international community that are willing to work out solutions to this
 > >    very difficult issue.
 > >       73,
 > >       Will
 > >
 > >    "Jim R." wrote:
 > >    >
 > >    > Frank, add that the frequencies would have to be changed about every -
 > >    > what - 45 minutes, at the least. I doubt they have time to do that.
 > >    > --
 > >    > Best regards, Jim Romelfanger, K9ZZ
 > >
 > >    --
 > >    Will Marchant, KC6ROL
 > >    CHIPS Lead Software Engineer:
 > >    marchant@ssl.berkeley.edu   http://chips.ssl.berkeley.edu/
 > >    AMSAT-NA SAREX Operations Manager:
 > >    kc6rol@amsat.org       http://www.citizen.infi.net/~wmarchan/
 > >    ----
 > >    Via the sarex mailing list at AMSAT.ORG courtesy of AMSAT-NA.
 > >    To unsubscribe, send "unsubscribe sarex" to Majordomo@amsat.org
 > >
 > >   ------------------------------------------------------------------------
 > >                    Name: pic21964.pcx
 > >    pic21964.pcx    Type: PCX Image Document (application/x-unknown-content-type-PCXImage.Document)
 > >                Encoding: base64
 > 
 > --
 > Will Marchant, KC6ROL
 > CHIPS Lead Software Engineer:
 > marchant@ssl.berkeley.edu       http://chips.ssl.berkeley.edu/
 > AMSAT-NA SAREX Operations Manager:
 > kc6rol@amsat.org                http://www.citizen.infi.net/~wmarchan/


Will, Eric just echoed an idea I had - verbatim. If he and I have
considered the possibility of some intriguing props studies from ABOVE
the F layer, others must have as well. The possibility for some real
research is there.
-- 
Best regards, Jim Romelfanger, K9ZZ

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