[amsat-bb] Russian Thing

mvivona at yahoo.com mvivona at yahoo.com
Wed Jul 19 21:35:46 UTC 2017

You are correct Simon,
Digital TV uses 8VSB coding which does not allow the signal from either side to be moving more that a few miles per hour. So, there is no way to have a Digital TV receiver lock on to a reflection from ISS.  Michael KC4ZVA

      From: Simon Brown <simon at sdr-radio.com>
 To: 'Robert Bruninga' <bruninga at usna.edu>; amsat-bb at amsat.org 
 Sent: Wednesday, July 19, 2017 2:10 PM
 Subject: Re: [amsat-bb] Russian Thing

You'll also see reflections from aeroplanes.

Simon Brown, G4ELI

-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Robert
Sent: 19 July 2017 13:27
To: amsat-bb at amsat.org
Subject: Re: [amsat-bb] Russian Thing

Easy to test.  Just pick a UHF TV station that is hudreds of miles ffrom you
and wait for the ISS to fly through the path between you.

BUT!  I don't have a clue how you can see the effect with Digital TV???
With analog, the flutter was instantaneous and a direct correspondence to
signal strength even if only milliseconds came through.  On digital TV, you
don't get nuttin until you have had SOLID seconds of unflutter digital

So I guess that old technique is simply dead.

Maybe do it with FM radio?  They have a multi thousand watt transmitter
aimed at their horizon.  Just choose a station that is 500 miles away...

Better yet, simply tune to a totally clear FM channel in your rural area (if
there is one) and wait.  If the ISS flies through the path of any station
anywhere on that channel, you should hear something?


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 mailing list