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1994-11-13
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Date: Tue, 18 Oct 94 04:30:46 PDT
From: Ham-Space Mailing List and Newsgroup <ham-space@ucsd.edu>
Errors-To: Ham-Space-Errors@UCSD.Edu
Reply-To: Ham-Space@UCSD.Edu
Precedence: List
Subject: Ham-Space Digest V94 #294
To: Ham-Space
Ham-Space Digest Tue, 18 Oct 94 Volume 94 : Issue 294
Today's Topics:
MIR activity ?
More Static Satellite Tracking Device (2 msgs)
Phase III, Modes B&J Equipment
Upload and display problems with WISP
Send Replies or notes for publication to: <Ham-Space@UCSD.Edu>
Send subscription requests to: <Ham-Space-REQUEST@UCSD.Edu>
Problems you can't solve otherwise to brian@ucsd.edu.
Archives of past issues of the Ham-Space Digest are available
(by FTP only) from UCSD.Edu in directory "mailarchives/ham-space".
We trust that readers are intelligent enough to realize that all text
herein consists of personal comments and does not represent the official
policies or positions of any party. Your mileage may vary. So there.
----------------------------------------------------------------------
Date: Mon, 17 Oct 1994 10:07:58 GMT
From: icesb@iroe.fi.cnr.it (Lapo Pieri)
Subject: MIR activity ?
Some question on the MIR:
1) What about ham activity on MIR station ?
2) Is there a store and forward access,and when is active ?
3) Where is R2MIR-1 ?
4) I've heard that RV3DR is the QSL manager for MIR hamradio, is there an
internet address for RV3DR?
Thanks a lot in advance
Lapo Pieri IK5NAX
--------------------------------------------------------------------------------
Lapo Pieri IK5NAX | Internet:
| lpieri@nyx.cs.du.edu
Istituto per la Ricerca sulle Onde Elettromagnetiche | icesb@iroe.fi.cnr.it
del Consiglio nazionale delle Ricerche (IROE-CNR) |
| phone: +39 55 4235 276
[Istitute for the Research on Electromagnetic Waves | home: +39 55 410209
of the National Council of Research] |
--------------------------------------------------------------------------------
------------------------------
Date: Mon, 17 Oct 1994 18:09:42 GMT
From: charlier@lsid.hp.com (Charlie Panek)
Subject: More Static Satellite Tracking Device
Jordi Caralt Barba (caralt@gaig.upc.es) wrote:
(about planar phased electrically steerable antenna arrays)
: 5. Is there anybody who knows something about high directivity planar arrays?
: Am I the first to attempt doing such a device?
Back when I was fresh out of engineering school in 1978, I interviewed
with Raytheon in Massachusetts. One of the things they showed me that
they were working on was a UHF radar system for the military. I believe
it was called PAVE-PAWS or something like that. It used large arrays
of phased antennas (actually individual receiver/transmitters I think),
and the beam was steered by controlling the phase at each antenna. I
believe their system consisted of dozens or maybe even hundreds of antennas.
The one thing that really stuck out in my mind at the time was seeing
the test equipment indicating frequencies right in the amateur 450 MHz band!
Perhaps there's someone around who worked on that thing that can supply
more information.
The tricky thing, I would think, would be controlling the phase accurately
enough; keeping it stable with temperature, and keeping the phase delays
through any active elements consistent from antenna to antenna. I know
from cutting 1/4 wave transmission lines on 450 MHz, that just a few
millimeters of error can move you many MHz in frequency.
Lots of luck!
--
Charlie Panek KX7L Hewlett Packard Company
charlier@lsid.hp.com Lake Stevens Instrument Division
Everett, Washington
------------------------------
Date: 17 Oct 1994 23:31:42 GMT
From: tls@gate.net (Terry Steinford)
Subject: More Static Satellite Tracking Device
Charlie Panek (charlier@lsid.hp.com) wrote:
: The one thing that really stuck out in my mind at the time was seeing
: the test equipment indicating frequencies right in the amateur 450 MHz band!
I believe that in most of the 450 MHz band government radiolocation is the
primary use, amateur is secondary.
------------------------------
Date: Mon, 17 Oct 1994 17:14:51 GMT
From: sem2r@galen.med.Virginia.EDU (Stacey E. Mills)
Subject: Phase III, Modes B&J Equipment
I'm newly returned to hamming after 20 years off and want to
get onto the Phase III satellites, Modes B & J. I have a
Kenwood TS790, but I need recommendations regarding high-gain
circularly polarized antennas for 2 mtrs and 70 cm,
alt-azi rotators, preamplifers, and rotor tracking software and
hardware interfaces. Any and all advice would be welcomed!!!
Please respond directly to:
Stacey E. Mills / WB4QKT
E-Mail: SEM2R@galen.med.virginia.edu
Thanks for your help!! Stacey / WB4QKT
------------------------------
Date: Mon, 17 Oct 1994 16:18:04 GMT
From: marcoh@world.std.com (Mark A Heroux)
Subject: Upload and display problems with WISP
I am relatively new to digital satellites, but have successfully
downloaded files from AO-16 and LO-19. I'm using the 2207 version
WISP, and when I attempt to upload, after apparently transmitting
the whole file (~800 bytes), WISP tells me "file not accepted by
server".
Also, if you use WISP, do you find that the AOS/LOS display in the
upper left corner of GSC overwrites part of the pass prediction and
radio button displays?
If you know the cause or possible causes of these errors, would you
please email me and I will summarize to the net.
Many thanks,
Marco
marcoh@world.std.com, n1mae@amsat.org
------------------------------
End of Ham-Space Digest V94 #294
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