Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #21   Report Post  
Old November 2nd 04, 09:45 PM
bpnjensen
 
Posts: n/a
Default

dxAce wrote in message ...
bpnjensen wrote:

dxAce wrote in message ...


\ Who the hell said I'm relying on a flat map...?

It's either that or a globe - there ain't no in between...and it's
obvious you aren't talking about a spherical surface

It's clear to me that you don't understand grey line propagation, or the terminology that goes along with it.


And you apprently have a monopoly on this? I don't see it. In fact,
I would pay money to see you try to explain it.

Someday perhaps you'll understand what the term 'crooked path' means.


If someone would explain it to me without being a total jerk, maybe I
would. But, maybe I'm asking the wrong person - all you do lately is
call people 'tards for not agreeing with you...you don't contribute
much.

It's just a term! Get a frickin clue Jensen!


Ah, I see, so you use it but it's meaningless? Your powers of
communication are staggering.

You get back to me when you figure it out!
Boggling.


To you, maybe - but based on what I've seen and read, you're the *only
one* who doesn't understand - and not a single shred of what you've
said here gives any indication otherwise.

dxAce
Michigan
USA


BJ
**
  #22   Report Post  
Old November 2nd 04, 09:48 PM
bpnjensen
 
Posts: n/a
Default

dxAce wrote in message ...
bpnjensen wrote:

dxAce wrote in message ...
bpnjensen wrote:

dxAce wrote in message ...
bpnjensen wrote:

dxAce wrote in message ...

snips

No, the grey line is not always necessarily a straight line path, but can be a
'crooked path', and that is 'veering around corners' as you say.

Hmmm - can you explain this?

Geometrically, with the sun's rays essentially parallel to one another
shining on the disc of the earth, the grayline would always represent
a virtually perfect circumference, no matter which exact face the
earth presents to the sun - hence, while a flat map of the world shows
an undulating wave, the grayline is actually a 'straight' line along
the earth's face. The only deviation from this that I can determine
would be the astronomical width of the sun, about 0.5 degree, and
whatever 'ionic' width either side of that partial illumination at
sunrise/sunset would be involved in improved propagation.

I can imagine that something about the earth's magnetic field could
vary this, especilly *at* the poles - is this why some 'crookedness'
can occur?

It's very easy to see, just look at a grey line map.

It's a well known propagation phenomenon.

At least amongst the cognoscenti.

And, has nothing to do with the magnetic field.

dxAce
Michigan
USA


A "map" is not an accurate representation of the globe's surface - if
it is not on a spherical surface, then every single object plotted on
a map has some degree of distortion. The lovely sine-wave shaped
grayline you see on a typical flat map is a distortion of its true
shape, just as the map itself is a distortion of the earth's surface.

In reality, a grayline is a virtually perfect circle in a single plane
slicing through the center of the planet, corresponding to the
terminator of the sun's rays as they reach the earth. Even the
grayline websites admit this.

It is fairly easy to visualize. Put a ball (the earth) up in front of
you, with a bright small light (the sun) situated about 15 feet away.
Look at the side of the ball - the gray area at the horizon traces a
neat planar circle around the perimeter of the ball. Same with ol'
sol and terra, except on a bigger scale.

That, from a cognoscentus of simple geometry and astronomy.


I'm truly sorry that you don't understand the concept, and cannot understand it. A case of
trying to over engineer the obvious?

Boggling.

But, I'm not gonna lose any sleep over it!

dxAce
Michigan
USA


And, noting a person who obviously does not have your immense
background in this field and would love to have the benefit of your
vast knowledge, you are still unwilling to share it, I guess.

Or incapable.

I'd bet the latter.

You have no idea what you're talking about.

BJ
**
  #23   Report Post  
Old November 2nd 04, 09:57 PM
dxAce
 
Posts: n/a
Default



bpnjensen wrote:

dxAce wrote in message ...
bpnjensen wrote:

dxAce wrote in message ...


\ Who the hell said I'm relying on a flat map...?

It's either that or a globe - there ain't no in between...and it's
obvious you aren't talking about a spherical surface

It's clear to me that you don't understand grey line propagation, or the terminology that goes along with it.


And you apprently have a monopoly on this? I don't see it. In fact,
I would pay money to see you try to explain it.

Someday perhaps you'll understand what the term 'crooked path' means.


If someone would explain it to me without being a total jerk, maybe I
would. But, maybe I'm asking the wrong person - all you do lately is
call people 'tards for not agreeing with you...you don't contribute
much.




It's just a term! Get a frickin clue Jensen!


Ah, I see, so you use it but it's meaningless? Your powers of
communication are staggering.

You get back to me when you figure it out!
Boggling.


To you, maybe - but based on what I've seen and read, you're the *only
one* who doesn't understand - and not a single shred of what you've
said here gives any indication otherwise.


Hey... don't have a damn hissy fit because you can't understand an extremely simple concept. And it is indeed
simple, you're probably looking right at it, yet you can't see it.

I certainly don't have a monopoly on the concept, nor the term itself, and I am not the originator of the term.

But it is certainly descriptive of what occurs, I'm just sorry you can't visualise it.

Truly boggling.

dxAce
Michigan
USA






  #24   Report Post  
Old November 2nd 04, 09:59 PM
dxAce
 
Posts: n/a
Default



bpnjensen wrote:

dxAce wrote in message ...
bpnjensen wrote:

dxAce wrote in message ...
bpnjensen wrote:

dxAce wrote in message ...
bpnjensen wrote:

dxAce wrote in message ...

snips

No, the grey line is not always necessarily a straight line path, but can be a
'crooked path', and that is 'veering around corners' as you say.

Hmmm - can you explain this?

Geometrically, with the sun's rays essentially parallel to one another
shining on the disc of the earth, the grayline would always represent
a virtually perfect circumference, no matter which exact face the
earth presents to the sun - hence, while a flat map of the world shows
an undulating wave, the grayline is actually a 'straight' line along
the earth's face. The only deviation from this that I can determine
would be the astronomical width of the sun, about 0.5 degree, and
whatever 'ionic' width either side of that partial illumination at
sunrise/sunset would be involved in improved propagation.

I can imagine that something about the earth's magnetic field could
vary this, especilly *at* the poles - is this why some 'crookedness'
can occur?

It's very easy to see, just look at a grey line map.

It's a well known propagation phenomenon.

At least amongst the cognoscenti.

And, has nothing to do with the magnetic field.

dxAce
Michigan
USA

A "map" is not an accurate representation of the globe's surface - if
it is not on a spherical surface, then every single object plotted on
a map has some degree of distortion. The lovely sine-wave shaped
grayline you see on a typical flat map is a distortion of its true
shape, just as the map itself is a distortion of the earth's surface.

In reality, a grayline is a virtually perfect circle in a single plane
slicing through the center of the planet, corresponding to the
terminator of the sun's rays as they reach the earth. Even the
grayline websites admit this.

It is fairly easy to visualize. Put a ball (the earth) up in front of
you, with a bright small light (the sun) situated about 15 feet away.
Look at the side of the ball - the gray area at the horizon traces a
neat planar circle around the perimeter of the ball. Same with ol'
sol and terra, except on a bigger scale.

That, from a cognoscentus of simple geometry and astronomy.


I'm truly sorry that you don't understand the concept, and cannot understand it. A case of
trying to over engineer the obvious?

Boggling.

But, I'm not gonna lose any sleep over it!

dxAce
Michigan
USA


And, noting a person who obviously does not have your immense
background in this field and would love to have the benefit of your
vast knowledge, you are still unwilling to share it, I guess.

Or incapable.

I'd bet the latter.

You have no idea what you're talking about.


Sure I do... you simply seem unable to grasp or visualize the concept.

'Tis you who have no idea!

dxAce
Michigan
USA


  #25   Report Post  
Old November 2nd 04, 10:07 PM
dxAce
 
Posts: n/a
Default



bpnjensen wrote:

dxAce wrote in message ...
bpnjensen wrote:

dxAce wrote in message ...
bpnjensen wrote:

dxAce wrote in message ...
bpnjensen wrote:

dxAce wrote in message ...

snips

No, the grey line is not always necessarily a straight line path, but can be a
'crooked path', and that is 'veering around corners' as you say.

Hmmm - can you explain this?

Geometrically, with the sun's rays essentially parallel to one another
shining on the disc of the earth, the grayline would always represent
a virtually perfect circumference, no matter which exact face the
earth presents to the sun - hence, while a flat map of the world shows
an undulating wave, the grayline is actually a 'straight' line along
the earth's face. The only deviation from this that I can determine
would be the astronomical width of the sun, about 0.5 degree, and
whatever 'ionic' width either side of that partial illumination at
sunrise/sunset would be involved in improved propagation.

I can imagine that something about the earth's magnetic field could
vary this, especilly *at* the poles - is this why some 'crookedness'
can occur?

It's very easy to see, just look at a grey line map.

It's a well known propagation phenomenon.

At least amongst the cognoscenti.

And, has nothing to do with the magnetic field.

dxAce
Michigan
USA

A "map" is not an accurate representation of the globe's surface - if
it is not on a spherical surface, then every single object plotted on
a map has some degree of distortion. The lovely sine-wave shaped
grayline you see on a typical flat map is a distortion of its true
shape, just as the map itself is a distortion of the earth's surface.

In reality, a grayline is a virtually perfect circle in a single plane
slicing through the center of the planet, corresponding to the
terminator of the sun's rays as they reach the earth. Even the
grayline websites admit this.

It is fairly easy to visualize. Put a ball (the earth) up in front of
you, with a bright small light (the sun) situated about 15 feet away.
Look at the side of the ball - the gray area at the horizon traces a
neat planar circle around the perimeter of the ball. Same with ol'
sol and terra, except on a bigger scale.

That, from a cognoscentus of simple geometry and astronomy.


I'm truly sorry that you don't understand the concept, and cannot understand it. A case of
trying to over engineer the obvious?

Boggling.

But, I'm not gonna lose any sleep over it!

dxAce
Michigan
USA


And, noting a person who obviously does not have your immense
background in this field and would love to have the benefit of your
vast knowledge, you are still unwilling to share it, I guess.

Or incapable.

I'd bet the latter.

You have no idea what you're talking about.


You just get back to me after you understand what grey line propagation is all about.

Study up, do a little thinking, get yourself an azimuthal map, figure out how to plot the gray
line on it (that will certainly go a long way to help you visualize what occurs) and than you
get back to me.

Until then, I guess I do know more about it than you do, since it only took me about 2 seconds
to comprehend it when I first learned of it.

It's so simple!

Boggling, truly boggling.

dxAce
Michigan
USA




  #26   Report Post  
Old November 3rd 04, 02:59 PM
bpnjensen
 
Posts: n/a
Default

dxAce wrote in message ...
bpnjensen wrote:

dxAce wrote in message ...

Regardless of how some SWL's antennas are aligned, the physics of wave propagation dictate how the signal will
arrive, not the antenna position. But... if one has an antenna, or antennas to position properly, they will be
able to take greater advantage of the direction the signal is coming from, thereby getting better reception.

Now go ponder that grey line map again.

I know you'll get it yet! It's actually very simple.

dxAce
Michigan
USA


Here are some websites that not only describe some things about
grayline propagation, but also clearly show it's true shape and why a
flat map will portray a grayline differently than its true shape
(which is, in actual fact, a great circle with an approximately
85-minute-wide width along the sunrise/sunset terminator).

http://www.iri.tudelft.nl/~geurink/grayline.htm
http://www.kc4cop.bizland.com/propagation_gray_line.htm
http://www.cpcug.org/user/wfeidt/Misc/n4kgprop.html

There are numerous websites also that but discuss how, through
geomagnetic-solar-induced electron gradients, radio propagation may be
diverted from its normal great-circle path onto *another* and
different great circle pathway - and how, if one is lucky, one of
those great circle paths may a grayline terminator that will deliver a
wondrous DX signal to your ears.

Some other websites even go on to say that, unless you are
running/listening to CW or high-powered SSB, these diversions are not
always likely to yield good results, because much is still lost when
the RRF shifts pathways.

Radio waves, like light waves (which they really are), do not just
bounce around as they like depending upon random events and
conditions. They travel in straight lines, and are affected (under
earthbound conditions) only by reflective and refractive factors -
ionospheric skip keeps them near the earth, and geomagnetic electronic
gradients can veer them. Absent the latter, within a very narrow
bound, those signals will assume a great circle pathway -

Which brings us to the tentative conclusion that DxAce's most common
and likely reception pathway for Diego Garcia is a great circle route,
and a trace of that route is going to give you, for practical
purposes, a pathway that closely approaches the north or south
geomagnetic pole.


Yes, but it's not grey line!


I know it's not. I never said it was.

Damn, you just don't get grey line, do you? Nor do you understand the grey line term of 'crooked path'.


I'd like to, but No, in all of your responses you've never taken the
time to explain it or give me the slightest idea hwo I can find out.
You have no interest in helping a fellow DXer out - you'd rather just
find a reason to be a bully. Well, your dreams have come true again.

If it sounds watery one day and not so watery the
next, it is because the interaction between the solar flux and the
earth's geomagnetic field varies from day to day - providing, perhaps,
modest skewing or rippling of the signal.


No ****.

I give up. Gonna let the damn 'tard stay a 'tard.

dxAce
Michigan
USA


Typical response from Steve. Instead of taking a little time to
explain what he is talking about - which for a person of his
incredible IQ should be a snap - Steve continues to belittle and
cajole, and like with so many other people he chooses to disagree
with, closes with this classic insult that makes him sound like a
broken Edison cylinder.

I've heard that you're a nice guy over the phone - probably even nicer
in person - why such a prick on the internet?

Bruce Jensen
  #27   Report Post  
Old November 3rd 04, 03:03 PM
dxAce
 
Posts: n/a
Default



bpnjensen wrote:

dxAce wrote in message ...
bpnjensen wrote:

dxAce wrote in message ...

Regardless of how some SWL's antennas are aligned, the physics of wave propagation dictate how the signal will
arrive, not the antenna position. But... if one has an antenna, or antennas to position properly, they will be
able to take greater advantage of the direction the signal is coming from, thereby getting better reception.

Now go ponder that grey line map again.

I know you'll get it yet! It's actually very simple.

dxAce
Michigan
USA

Here are some websites that not only describe some things about
grayline propagation, but also clearly show it's true shape and why a
flat map will portray a grayline differently than its true shape
(which is, in actual fact, a great circle with an approximately
85-minute-wide width along the sunrise/sunset terminator).

http://www.iri.tudelft.nl/~geurink/grayline.htm
http://www.kc4cop.bizland.com/propagation_gray_line.htm
http://www.cpcug.org/user/wfeidt/Misc/n4kgprop.html

There are numerous websites also that but discuss how, through
geomagnetic-solar-induced electron gradients, radio propagation may be
diverted from its normal great-circle path onto *another* and
different great circle pathway - and how, if one is lucky, one of
those great circle paths may a grayline terminator that will deliver a
wondrous DX signal to your ears.

Some other websites even go on to say that, unless you are
running/listening to CW or high-powered SSB, these diversions are not
always likely to yield good results, because much is still lost when
the RRF shifts pathways.

Radio waves, like light waves (which they really are), do not just
bounce around as they like depending upon random events and
conditions. They travel in straight lines, and are affected (under
earthbound conditions) only by reflective and refractive factors -
ionospheric skip keeps them near the earth, and geomagnetic electronic
gradients can veer them. Absent the latter, within a very narrow
bound, those signals will assume a great circle pathway -

Which brings us to the tentative conclusion that DxAce's most common
and likely reception pathway for Diego Garcia is a great circle route,
and a trace of that route is going to give you, for practical
purposes, a pathway that closely approaches the north or south
geomagnetic pole.


Yes, but it's not grey line!


I know it's not. I never said it was.

Damn, you just don't get grey line, do you? Nor do you understand the grey line term of 'crooked path'.


I'd like to, but No, in all of your responses you've never taken the
time to explain it or give me the slightest idea hwo I can find out.
You have no interest in helping a fellow DXer out - you'd rather just
find a reason to be a bully. Well, your dreams have come true again.

If it sounds watery one day and not so watery the
next, it is because the interaction between the solar flux and the
earth's geomagnetic field varies from day to day - providing, perhaps,
modest skewing or rippling of the signal.


No ****.

I give up. Gonna let the damn 'tard stay a 'tard.

dxAce
Michigan
USA


Typical response from Steve. Instead of taking a little time to
explain what he is talking about - which for a person of his
incredible IQ should be a snap - Steve continues to belittle and
cajole, and like with so many other people he chooses to disagree
with, closes with this classic insult that makes him sound like a
broken Edison cylinder.

I've heard that you're a nice guy over the phone - probably even nicer
in person - why such a prick on the internet?


Hey, get off my case Jensen. I can't help it if you can't understand a simple concept.

It ought to be easy for a semi-pro whatever...

Now stop having a Northern California hissy fit.

dxAce
Michigan
USA


  #28   Report Post  
Old November 3rd 04, 10:48 PM
bpnjensen
 
Posts: n/a
Default

dxAce wrote in message ...
bpnjensen wrote:

dxAce wrote in message ...
bpnjensen wrote:

dxAce wrote in message ...

Regardless of how some SWL's antennas are aligned, the physics of wave propagation dictate how the signal will
arrive, not the antenna position. But... if one has an antenna, or antennas to position properly, they will be
able to take greater advantage of the direction the signal is coming from, thereby getting better reception.

Now go ponder that grey line map again.

I know you'll get it yet! It's actually very simple.

dxAce
Michigan
USA

Here are some websites that not only describe some things about
grayline propagation, but also clearly show it's true shape and why a
flat map will portray a grayline differently than its true shape
(which is, in actual fact, a great circle with an approximately
85-minute-wide width along the sunrise/sunset terminator).

http://www.iri.tudelft.nl/~geurink/grayline.htm
http://www.kc4cop.bizland.com/propagation_gray_line.htm
http://www.cpcug.org/user/wfeidt/Misc/n4kgprop.html

There are numerous websites also that but discuss how, through
geomagnetic-solar-induced electron gradients, radio propagation may be
diverted from its normal great-circle path onto *another* and
different great circle pathway - and how, if one is lucky, one of
those great circle paths may a grayline terminator that will deliver a
wondrous DX signal to your ears.

Some other websites even go on to say that, unless you are
running/listening to CW or high-powered SSB, these diversions are not
always likely to yield good results, because much is still lost when
the RRF shifts pathways.

Radio waves, like light waves (which they really are), do not just
bounce around as they like depending upon random events and
conditions. They travel in straight lines, and are affected (under
earthbound conditions) only by reflective and refractive factors -
ionospheric skip keeps them near the earth, and geomagnetic electronic
gradients can veer them. Absent the latter, within a very narrow
bound, those signals will assume a great circle pathway -

Which brings us to the tentative conclusion that DxAce's most common
and likely reception pathway for Diego Garcia is a great circle route,
and a trace of that route is going to give you, for practical
purposes, a pathway that closely approaches the north or south
geomagnetic pole.

Yes, but it's not grey line!


I know it's not. I never said it was.

Damn, you just don't get grey line, do you? Nor do you understand the grey line term of 'crooked path'.


I'd like to, but No, in all of your responses you've never taken the
time to explain it or give me the slightest idea hwo I can find out.
You have no interest in helping a fellow DXer out - you'd rather just
find a reason to be a bully. Well, your dreams have come true again.

If it sounds watery one day and not so watery the
next, it is because the interaction between the solar flux and the
earth's geomagnetic field varies from day to day - providing, perhaps,
modest skewing or rippling of the signal.

No ****.

I give up. Gonna let the damn 'tard stay a 'tard.

dxAce
Michigan
USA


Typical response from Steve. Instead of taking a little time to
explain what he is talking about - which for a person of his
incredible IQ should be a snap - Steve continues to belittle and
cajole, and like with so many other people he chooses to disagree
with, closes with this classic insult that makes him sound like a
broken Edison cylinder.

I've heard that you're a nice guy over the phone - probably even nicer
in person - why such a prick on the internet?


Hey, get off my case Jensen. I can't help it if you can't understand a simple concept.

It ought to be easy for a semi-pro whatever...

Now stop having a Northern California hissy fit.

dxAce
Michigan
USA


You may consider me off your case. You're probably about my age,
maybe a little bit older, and we get to this point in life, little
things (like screwy misunderstandings on the internet) can set us off.

I do now understand what you were talking about - and honestly, thanks
for the subtle pointers - ultimately, I managed to obtain more
information came from an alternate source, and to my own satisfaction,
I was not completely wrong :-)

A grayline is still, however, a great circle, no matter what kind of
map you draw it on. It's the internal electronic workings that give
it that so-desirable ducting effect, and its crookedness. Oh, to have
aim-able antennas...

BJ
  #29   Report Post  
Old November 3rd 04, 10:52 PM
dxAce
 
Posts: n/a
Default



bpnjensen wrote:

dxAce wrote in message ...
bpnjensen wrote:

dxAce wrote in message ...
bpnjensen wrote:

dxAce wrote in message ...

Regardless of how some SWL's antennas are aligned, the physics of wave propagation dictate how the signal will
arrive, not the antenna position. But... if one has an antenna, or antennas to position properly, they will be
able to take greater advantage of the direction the signal is coming from, thereby getting better reception.

Now go ponder that grey line map again.

I know you'll get it yet! It's actually very simple.

dxAce
Michigan
USA

Here are some websites that not only describe some things about
grayline propagation, but also clearly show it's true shape and why a
flat map will portray a grayline differently than its true shape
(which is, in actual fact, a great circle with an approximately
85-minute-wide width along the sunrise/sunset terminator).

http://www.iri.tudelft.nl/~geurink/grayline.htm
http://www.kc4cop.bizland.com/propagation_gray_line.htm
http://www.cpcug.org/user/wfeidt/Misc/n4kgprop.html

There are numerous websites also that but discuss how, through
geomagnetic-solar-induced electron gradients, radio propagation may be
diverted from its normal great-circle path onto *another* and
different great circle pathway - and how, if one is lucky, one of
those great circle paths may a grayline terminator that will deliver a
wondrous DX signal to your ears.

Some other websites even go on to say that, unless you are
running/listening to CW or high-powered SSB, these diversions are not
always likely to yield good results, because much is still lost when
the RRF shifts pathways.

Radio waves, like light waves (which they really are), do not just
bounce around as they like depending upon random events and
conditions. They travel in straight lines, and are affected (under
earthbound conditions) only by reflective and refractive factors -
ionospheric skip keeps them near the earth, and geomagnetic electronic
gradients can veer them. Absent the latter, within a very narrow
bound, those signals will assume a great circle pathway -

Which brings us to the tentative conclusion that DxAce's most common
and likely reception pathway for Diego Garcia is a great circle route,
and a trace of that route is going to give you, for practical
purposes, a pathway that closely approaches the north or south
geomagnetic pole.

Yes, but it's not grey line!

I know it's not. I never said it was.

Damn, you just don't get grey line, do you? Nor do you understand the grey line term of 'crooked path'.

I'd like to, but No, in all of your responses you've never taken the
time to explain it or give me the slightest idea hwo I can find out.
You have no interest in helping a fellow DXer out - you'd rather just
find a reason to be a bully. Well, your dreams have come true again.

If it sounds watery one day and not so watery the
next, it is because the interaction between the solar flux and the
earth's geomagnetic field varies from day to day - providing, perhaps,
modest skewing or rippling of the signal.

No ****.

I give up. Gonna let the damn 'tard stay a 'tard.

dxAce
Michigan
USA

Typical response from Steve. Instead of taking a little time to
explain what he is talking about - which for a person of his
incredible IQ should be a snap - Steve continues to belittle and
cajole, and like with so many other people he chooses to disagree
with, closes with this classic insult that makes him sound like a
broken Edison cylinder.

I've heard that you're a nice guy over the phone - probably even nicer
in person - why such a prick on the internet?


Hey, get off my case Jensen. I can't help it if you can't understand a simple concept.

It ought to be easy for a semi-pro whatever...

Now stop having a Northern California hissy fit.

dxAce
Michigan
USA


You may consider me off your case. You're probably about my age,
maybe a little bit older, and we get to this point in life, little
things (like screwy misunderstandings on the internet) can set us off.

I do now understand what you were talking about - and honestly, thanks
for the subtle pointers - ultimately, I managed to obtain more
information came from an alternate source, and to my own satisfaction,
I was not completely wrong :-)

A grayline is still, however, a great circle, no matter what kind of
map you draw it on. It's the internal electronic workings that give
it that so-desirable ducting effect, and its crookedness. Oh, to have
aim-able antennas...


Have a nice evening, Bruce.

dxAce
Michigan
USA


  #30   Report Post  
Old November 4th 04, 09:26 AM
dxAce
 
Posts: n/a
Default



bpnjensen wrote:

dxAce wrote in message ...
bpnjensen wrote:

dxAce wrote in message ...
bpnjensen wrote:

dxAce wrote in message ...

Regardless of how some SWL's antennas are aligned, the physics of wave propagation dictate how the signal will
arrive, not the antenna position. But... if one has an antenna, or antennas to position properly, they will be
able to take greater advantage of the direction the signal is coming from, thereby getting better reception.

Now go ponder that grey line map again.

I know you'll get it yet! It's actually very simple.

dxAce
Michigan
USA

Here are some websites that not only describe some things about
grayline propagation, but also clearly show it's true shape and why a
flat map will portray a grayline differently than its true shape
(which is, in actual fact, a great circle with an approximately
85-minute-wide width along the sunrise/sunset terminator).

http://www.iri.tudelft.nl/~geurink/grayline.htm
http://www.kc4cop.bizland.com/propagation_gray_line.htm
http://www.cpcug.org/user/wfeidt/Misc/n4kgprop.html

There are numerous websites also that but discuss how, through
geomagnetic-solar-induced electron gradients, radio propagation may be
diverted from its normal great-circle path onto *another* and
different great circle pathway - and how, if one is lucky, one of
those great circle paths may a grayline terminator that will deliver a
wondrous DX signal to your ears.

Some other websites even go on to say that, unless you are
running/listening to CW or high-powered SSB, these diversions are not
always likely to yield good results, because much is still lost when
the RRF shifts pathways.

Radio waves, like light waves (which they really are), do not just
bounce around as they like depending upon random events and
conditions. They travel in straight lines, and are affected (under
earthbound conditions) only by reflective and refractive factors -
ionospheric skip keeps them near the earth, and geomagnetic electronic
gradients can veer them. Absent the latter, within a very narrow
bound, those signals will assume a great circle pathway -

Which brings us to the tentative conclusion that DxAce's most common
and likely reception pathway for Diego Garcia is a great circle route,
and a trace of that route is going to give you, for practical
purposes, a pathway that closely approaches the north or south
geomagnetic pole.

Yes, but it's not grey line!

I know it's not. I never said it was.

Damn, you just don't get grey line, do you? Nor do you understand the grey line term of 'crooked path'.

I'd like to, but No, in all of your responses you've never taken the
time to explain it or give me the slightest idea hwo I can find out.
You have no interest in helping a fellow DXer out - you'd rather just
find a reason to be a bully. Well, your dreams have come true again.

If it sounds watery one day and not so watery the
next, it is because the interaction between the solar flux and the
earth's geomagnetic field varies from day to day - providing, perhaps,
modest skewing or rippling of the signal.

No ****.

I give up. Gonna let the damn 'tard stay a 'tard.

dxAce
Michigan
USA

Typical response from Steve. Instead of taking a little time to
explain what he is talking about - which for a person of his
incredible IQ should be a snap - Steve continues to belittle and
cajole, and like with so many other people he chooses to disagree
with, closes with this classic insult that makes him sound like a
broken Edison cylinder.

I've heard that you're a nice guy over the phone - probably even nicer
in person - why such a prick on the internet?


Hey, get off my case Jensen. I can't help it if you can't understand a simple concept.

It ought to be easy for a semi-pro whatever...

Now stop having a Northern California hissy fit.

dxAce
Michigan
USA


You may consider me off your case. You're probably about my age,
maybe a little bit older, and we get to this point in life, little
things (like screwy misunderstandings on the internet) can set us off.

I do now understand what you were talking about - and honestly, thanks
for the subtle pointers - ultimately, I managed to obtain more
information came from an alternate source, and to my own satisfaction,
I was not completely wrong :-)

A grayline is still, however, a great circle, no matter what kind of
map you draw it on.


You are confusing a great circle route with grey line propagation. It is not the same.

A great circle route is the shortest path between two points. The reciprocal would be the long path.

Grey line propagation does not necessarily follow either the short path or the long path, but it does follow the grey line
terminator, which results in the 'crooked path'.

I know you'll get it figured out sooner or later!

It's incredibly simple.

It's the internal electronic workings that give
it that so-desirable ducting effect, and its crookedness.


It has nothing to do with electronics!

dxAce
Michigan
USA


Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Diego Garcia 13254 dxAce Shortwave 2 October 26th 04 09:21 PM
Diego Garcia 13254 dxAce Shortwave 0 October 19th 04 03:54 PM
Diego Garcia 13254 N8KDV Shortwave 1 January 14th 04 06:54 PM
Diego Garcia 13254 N8KDV Shortwave 1 October 29th 03 04:04 AM
13254 Diego Garcia N8KDV Shortwave 0 October 25th 03 01:39 PM


All times are GMT +1. The time now is 02:25 PM.

Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright ©2004-2025 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017