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Re: Topband: [Glowbugs] Former US Coast Guard transmitting site FS

To: Roy Morgan <>
Subject: Re: Topband: [Glowbugs] Former US Coast Guard transmitting site FS
From: Radio KH6O <>
Date: Wed, 13 Dec 2017 10:16:48 -0800
List-post: <>
Roy -- That Wisconsin site was for Differential GPS transmissions. Here's a
description of that system:

"DGPS uses a network of fixed ground-based reference stations to broadcast
the difference between the positions indicated by the GPS satellite systems
and the known fixed positions. These stations broadcast the difference
between the measured satellite pseudoranges and actual (internally
computed) pseudoranges, and receiver stations may correct their
pseudoranges by the same amount. The digital correction signal is typically
broadcast locally over ground-based transmitters of shorter range. The term
refers to a general technique of augmentation. The United States Coast
Guard (USCG) and Canadian Coast Guard (CCG) each run such systems in the
U.S. and Canada on the longwave radio frequencies between 285 kHz and 325
kHz near major waterways and harbors. The USCG's DGPS system has been named
NDGPS (Nationwide DGPS) and is now jointly administered by the Coast Guard
and the U.S. Department of Transportation’s Federal Highway Administration.
It consists of broadcast sites located throughout the inland and coastal
portions of the United States including Alaska, Hawaii and Puerto Rico."

Jeff KH6O

On Tue, Dec 12, 2017 at 7:53 PM, Roy Morgan <> wrote:

> Why would the Coast Guard have a radio station in Wisconsin?  The Great
> Lakes?
> Roy sends.
> On Dec 12, 2017, at 6:20 PM, Radio KH6O <> wrote:
> 11 acres includes 300 ft tower and 3 out-buildings in Medford WI:
> 73,
> Jeff KH6O
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