[amsat-bb] Global Geo SATCOM system?
bruninga at usna.edu
Fri Oct 7 16:28:24 UTC 2016
The http://aprs.org/outnet.html page now shows the OUTERNET coverage. It
is virtually worldwide...
From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Edward R
Sent: Friday, October 07, 2016 11:45 AM
To: amsat-bb at amsat.org
Subject: Re: [amsat-bb] Global Geo SATCOM system?
After Bob posted the info and links to Outernet I looked over the
equipment and the satellite footprints. Not clear to me if there would be
any reception at my latitude and longitude (60.688N, 151.331W).
From years past I recall how few ISS passes came above the southern
horizon far enough to any chance of contacts (max elev is 11-degrees for
about 12-min long pass). And ISS is in Leo orbit so its constantly
changing. A geo sat is fixed so you get - what you get (if it is too far
east or west of me that is "nothing"). Highest elev angle for Geo-sat
orbit is 21 degrees looking due south. Trees (solid forest) set lower
elev limit at about 9-degrees in all directions.
I used a 33-inch offset feed dish on AO-40 so that is available to put up
with suitable feed. The 8-dBi patch may have too wide a beam pattern for
use with such a dish. I wondered if using a cylindrical short cavity with
the patch might increase gain and narrow the beam adequately? For 2.4G I
used a six turn helical feed (RHCP).
Good info on the rtl-sdr. I gave one to my step-son which we were unable
to get good performance on VHF so maybe he would send it back to me. I
sent him a used RS HF receiver which is what he wanted. Pretty sure the
rtl-sdr is not in use (he was using Mac-OS which further complicated and
frustrated getting sw running); I have win-XP32.
73, Ed - KL7UW
"Kits made by KL7UW"
Dubus Mag business:
dubususa at gmail.com
Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available to
all interested persons worldwide without requiring membership. Opinions
expressed are solely those of the author, and do not reflect the official
views of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
More information about the AMSAT-BB