Hi all,

I have a question that a friend of mine and I were wondering about
tonight. We live in Norman, Oklahoma (near Oklahoma City) and we live on the
top floor of a 12 story building. In the morning, we notice that my TV
antenna picks up signals from 200 or 300 miles away, but around 9 or 10,
those signals begin to fade and they don't come back until the next morning
around the same time. What causes this? We've noticed that we're able to
pick up stations in Dallas and sometimes as far away as Arkansas. This has
been puzzling us for quite some time. I don't know if there's a
meteorological reason for this, or if it's more on the physics side.

Thanks.
Dave

In sci.physics David Moran wrote:
Hi all,

I have a question that a friend of mine and I were wondering about
tonight. We live in Norman, Oklahoma (near Oklahoma City) and we live on the
top floor of a 12 story building. In the morning, we notice that my TV
antenna picks up signals from 200 or 300 miles away, but around 9 or 10,
those signals begin to fade and they don't come back until the next morning
around the same time. What causes this? We've noticed that we're able to
pick up stations in Dallas and sometimes as far away as Arkansas. This has
been puzzling us for quite some time. I don't know if there's a
meteorological reason for this, or if it's more on the physics side.

Thanks.
Dave

Signals bounce off the ionosphere which is effected by the sun.

For more info, see http://www.arrl.org/tis/info/propagation.html

--
Jim Pennino

Remove -spam-sux to reply.

wrote in message
...
In sci.physics David Moran wrote:
Hi all,

I have a question that a friend of mine and I were wondering about
tonight. We live in Norman, Oklahoma (near Oklahoma City) and we live on
the
top floor of a 12 story building. In the morning, we notice that my TV
antenna picks up signals from 200 or 300 miles away, but around 9 or 10,
those signals begin to fade and they don't come back until the next
morning
around the same time. What causes this? We've noticed that we're able to
pick up stations in Dallas and sometimes as far away as Arkansas. This
has
been puzzling us for quite some time. I don't know if there's a
meteorological reason for this, or if it's more on the physics side.

Thanks.
Dave

Signals bounce off the ionosphere which is effected by the sun.

For more info, see http://www.arrl.org/tis/info/propagation.html

--

It's more likely VHF or UHF ducting through a thermal atmospheric layer.
The lower frequencies reflect off the ionosphere and it's much more than
200-300 miles.

Tom

On Tue, 31 Aug 2004 01:07:07 -0400, "Tm"
wrote:


wrote in message
...
In sci.physics David Moran wrote:
Hi all,

I have a question that a friend of mine and I were wondering about
tonight. We live in Norman, Oklahoma (near Oklahoma City) and we live on
the
top floor of a 12 story building. In the morning, we notice that my TV
antenna picks up signals from 200 or 300 miles away, but around 9 or 10,
those signals begin to fade and they don't come back until the next
morning
around the same time. What causes this? We've noticed that we're able to
pick up stations in Dallas and sometimes as far away as Arkansas. This
has
been puzzling us for quite some time. I don't know if there's a
meteorological reason for this, or if it's more on the physics side.

Thanks.
Dave

Signals bounce off the ionosphere which is effected by the sun.

For more info, see http://www.arrl.org/tis/info/propagation.html

--

It's more likely VHF or UHF ducting through a thermal atmospheric layer.
The lower frequencies reflect off the ionosphere and it's much more than
200-300 miles.

Tom

This is probably the effect of an "inversion layer"
Radio amateurs know how to use that to collect some extra points
for their diplomas.

w.
--
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
IN NONE WE TRUST.
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

"Helmut Wabnig" ************** wrote in message
...
| On Tue, 31 Aug 2004 01:07:07 -0400, "Tm"
| wrote:
|
|
| wrote in message
| ...
| In sci.physics David Moran wrote:
| Hi all,
|
| I have a question that a friend of mine and I were wondering about
| tonight. We live in Norman, Oklahoma (near Oklahoma City) and we live
on
| the
| top floor of a 12 story building. In the morning, we notice that my TV
| antenna picks up signals from 200 or 300 miles away, but around 9 or
10,
| those signals begin to fade and they don't come back until the next
| morning
| around the same time. What causes this? We've noticed that we're able
to
| pick up stations in Dallas and sometimes as far away as Arkansas. This
| has
| been puzzling us for quite some time. I don't know if there's a
| meteorological reason for this, or if it's more on the physics side.
|
| Thanks.
| Dave
|
| Signals bounce off the ionosphere which is effected by the sun.
|
| For more info, see http://www.arrl.org/tis/info/propagation.html
|
| --
|
| It's more likely VHF or UHF ducting through a thermal atmospheric layer.
| The lower frequencies reflect off the ionosphere and it's much more than
| 200-300 miles.
|
| Tom
|
| This is probably the effect of an "inversion layer"
| Radio amateurs know how to use that to collect some extra points
| for their diplomas.

Yeah, that is probably more plausible. TV signals are pretty much line of
sight as is FM radio since it is in the VHF band.

FrediFizzx

On Mon, 30 Aug 2004 23:14:24 -0500, "David Moran"
wrote:

Hi all,

I have a question that a friend of mine and I were wondering about
tonight. We live in Norman, Oklahoma (near Oklahoma City) and we live on the
top floor of a 12 story building. In the morning, we notice that my TV
antenna picks up signals from 200 or 300 miles away, but around 9 or 10,
those signals begin to fade and they don't come back until the next morning
around the same time. What causes this? We've noticed that we're able to
pick up stations in Dallas and sometimes as far away as Arkansas. This has
been puzzling us for quite some time. I don't know if there's a
meteorological reason for this, or if it's more on the physics side.

Thanks.
Dave



A good story he

http://www.tvtechnology.com/features...-signals.shtml

A strange one he

http://www.rense.com/general10/chhm.htm


--

- Charles
-
-does not play well with others

wrote in message ...
In sci.physics David Moran wrote:
Hi all,

I have a question that a friend of mine and I were wondering about
tonight. We live in Norman, Oklahoma (near Oklahoma City) and we live on the
top floor of a 12 story building. In the morning, we notice that my TV
antenna picks up signals from 200 or 300 miles away, but around 9 or 10,
those signals begin to fade and they don't come back until the next morning
around the same time. What causes this? We've noticed that we're able to
pick up stations in Dallas and sometimes as far away as Arkansas. This has
been puzzling us for quite some time. I don't know if there's a
meteorological reason for this, or if it's more on the physics side.

Thanks.
Dave

Signals bounce off the ionosphere which is effected by the sun.

For more info, see http://www.arrl.org/tis/info/propagation.html


TV operates in the VHF range(30-300MHz). RF at that wavelength tends
to poke through the ionosphere. Ionospheric diffraction is only
dependable at 30 MHz or lower.

In sci.physics Dave Monroe wrote:
wrote in message ...
In sci.physics David Moran wrote:
Hi all,

I have a question that a friend of mine and I were wondering about
tonight. We live in Norman, Oklahoma (near Oklahoma City) and we live on the
top floor of a 12 story building. In the morning, we notice that my TV
antenna picks up signals from 200 or 300 miles away, but around 9 or 10,
those signals begin to fade and they don't come back until the next morning
around the same time. What causes this? We've noticed that we're able to
pick up stations in Dallas and sometimes as far away as Arkansas. This has
been puzzling us for quite some time. I don't know if there's a
meteorological reason for this, or if it's more on the physics side.

Thanks.
Dave

Signals bounce off the ionosphere which is effected by the sun.

For more info, see http://www.arrl.org/tis/info/propagation.html


TV operates in the VHF range(30-300MHz). RF at that wavelength tends
to poke through the ionosphere. Ionospheric diffraction is only
dependable at 30 MHz or lower.

Who said anything about dependable?

The effects work at frequencies quit a bit higher than 30 MHz.

Read the link.

--
Jim Pennino

Remove -spam-sux to reply.

In sci.physics Tm wrote:

wrote in message
...
In sci.physics David Moran wrote:
Hi all,

I have a question that a friend of mine and I were wondering about
tonight. We live in Norman, Oklahoma (near Oklahoma City) and we live on
the
top floor of a 12 story building. In the morning, we notice that my TV
antenna picks up signals from 200 or 300 miles away, but around 9 or 10,
those signals begin to fade and they don't come back until the next
morning
around the same time. What causes this? We've noticed that we're able to
pick up stations in Dallas and sometimes as far away as Arkansas. This
has
been puzzling us for quite some time. I don't know if there's a
meteorological reason for this, or if it's more on the physics side.

Thanks.
Dave

Signals bounce off the ionosphere which is effected by the sun.

For more info, see http://www.arrl.org/tis/info/propagation.html

--

It's more likely VHF or UHF ducting through a thermal atmospheric layer.
The lower frequencies reflect off the ionosphere and it's much more than
200-300 miles.

Tom

Since he didn't say which channels he was getting, I suppose it could
also be tropo ducting.

No, it is not always much more than 200-300 miles; read the link.

--
Jim Pennino

Remove -spam-sux to reply.

There is a term called 'Sporatic E' that describes the ionospheric condition that
you are being able to take advantage of. My longest television reception on
channel 2 (approximately 55 MHZ or megacycles for the old timers) was a Los
Angeles station that was received by me on the east coast. Many Sporatic E's are
found early in the mornings. Again, this is an ionospheric phenomena and has been
observed and documented since early wireless. The study of the ionosphere is a
fascinating scientific field.

wrote:

In sci.physics Tm wrote:

wrote in message
...
In sci.physics David Moran wrote:
Hi all,

I have a question that a friend of mine and I were wondering about
tonight. We live in Norman, Oklahoma (near Oklahoma City) and we live on
the
top floor of a 12 story building. In the morning, we notice that my TV
antenna picks up signals from 200 or 300 miles away, but around 9 or 10,
those signals begin to fade and they don't come back until the next
morning
around the same time. What causes this? We've noticed that we're able to
pick up stations in Dallas and sometimes as far away as Arkansas. This
has
been puzzling us for quite some time. I don't know if there's a
meteorological reason for this, or if it's more on the physics side.

Thanks.
Dave

Signals bounce off the ionosphere which is effected by the sun.

For more info, see http://www.arrl.org/tis/info/propagation.html

--

It's more likely VHF or UHF ducting through a thermal atmospheric layer.
The lower frequencies reflect off the ionosphere and it's much more than
200-300 miles.

Tom

Since he didn't say which channels he was getting, I suppose it could
also be tropo ducting.

No, it is not always much more than 200-300 miles; read the link.

--
Jim Pennino

Remove -spam-sux to reply.