Re: [sarex] Human spaceflight ham frequencies

[Will Marchant <kc6rol@xxxxxxxxx>]

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
> 
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-- 
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/
----
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