[CQ-Contest] RF Signal Mapping from Space

[Barry Merrill]

My AIS Receiver in Ireland has no RF transmit, it sends the data over the
internet.

Barry  EI/W5GN

-----Original Message-----
From: CQ-Contest <cq-contest-bounces at contesting.com> On Behalf Of k3it
Sent: Saturday, April 6, 2019 11:38 AM
To: LY2KZ <vytenis.sciucka at gmail.com>
Cc: CQ-Contest Reflector <cq-contest at contesting.com>
Subject: Re: [CQ-Contest] RF Signal Mapping from Space

I believe this type of surveying of marine VHF signals from space is
already in place.   For example marinetraffic.com  uses feeds from a fleet
of satellites to map positions reported by the AIS VHF signals over the
entire globe.    They should be able to tell if an AIS signal is coming
roughly from the area of the reported position, or likely spoofed from a
stationary location (e.g. just 20 miles or so off shore).
https://www.orbcomm.com/en/networks/satellite-ais

73 Vasiliy



On Sat, Apr 6, 2019 at 9:50 AM LY2KZ <vytenis.sciucka at gmail.com> wrote:

> Most satellites fly well above ionosphere. So, don't check your purse 
> just yet. Unless you are into VHF/UHF.
>
> 73, Vytenis LY5T
>
> Need to get a quote on cost.  I am betting you will not like the price.
>
> 73, Keith NM5G
>
> -----Original Message-----
> From: CQ-Contest <cq-contest-bounces at contesting.com> On Behalf Of 
> David Siddall
> Sent: Thursday, April 4, 2019 8:09 PM
> To: cq-contest <cq-contest at contesting.com>
> Subject: [CQ-Contest] RF Signal Mapping from Space
>
> This is interesting.   Maybe after a couple of adjustments, CQ could
figure
> out which stations are running 3 dB or more over the legal limit on 
> certain weekends.  Or whether someone was really transmitting from 3Y0
>
> https://spacenews.com/hawkeye-360-unveils-first-rf-signal-mapping-prod
> uct/
>
> 73, Dave K3ZJ
>
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