In message 1104723596.308715@ftpsrv1, Mark writes
"M. J. Powell" wrote in message
From you to your neighbour via long path.

Or, from to you to YOU, via longpath!

Even better!

Mike

"HankG" wrote in message
news
Just curious. Anyone know what the longest GC distance from any point on
Earth to any other point?

Download this and it will show you the SP and LP to any location, plus the
grey line.

http://www.dxatlas.com/Download.asp
--
Simon Mason
Anlaby
East Yorkshire.
53°44'N 0°26'W
http://www.simonmason.karoo.net

OK,maybe it is Galaxy I meant to say.Whatever.
cuhulin

My spin -- comments welcome

Are you talking about the antipode distance or how far a radio wave can
travel around the earth ???

For antipode -- The earth has a circumference of approximately 24,900 miles.
More precisely the circumference of the earth at the equator is 24,902 mi
So 1/2 of 24,902 = 12,451 miles. That's half way around the world (at the
equator)
But as some one quipped -- from you to your next door neighbor is all the
way around the earth ~ 24,900 miles

For radio transmissions, one can transmit long path and achieve distances
greater than 12,451miles

For example the short path distance from So Calif to South Africa is about
9,895 miles but the long path distance is 14,962 miles

I have worked long path to South Africa on Ham radio many times
--
LC




"HankG" wrote in message
news
Just curious. Anyone know what the longest GC distance from any point on
Earth to any other point?

HankG

On Sun, 2 Jan 2005 09:03:24 -0500, "HankG" wrote:

Just curious. Anyone know what the longest GC distance from any point on
Earth to any other point?

Of course, the original definition (not the current definition) of the
meter was 1/10-millionth of the distance between the north pole and
the quator. So, presumably, the distance from pole to pole is 20
million meters or 20,000 km.

The earth is not quite a sphere - I believe the equator is slightly
longer than a circle of longitude.

"Joel Rubin" wrote
On Sun, 2 Jan 2005 09:03:24 -0500, "HankG" wrote:

Just curious. Anyone know what the longest GC distance from any point on
Earth to any other point?

Of course, the original definition (not the current definition) of the
meter was 1/10-millionth of the distance between the north pole and
the quator. So, presumably, the distance from pole to pole is 20
million meters or 20,000 km.

The earth is not quite a sphere - I believe the equator is slightly
longer than a circle of longitude.

I was not aware there was ever any intention to make a kilometer relational
to a nautical mile. It is not, and is just as arbitrary a length of
measurement in relationship to a nautical mile (which derives from the
spherical geometry of all modern positioning) as the statute (English) mile.
Metric arithmetic is certainly easier (for humans, computers could care
less) than statute miles. But both are arbitrary as far as latitude and
longitude are concerned and each require an equal effort of arithmetic to
convert to nautical miles. Air and marine charts use nautical miles for this
reason.

Jack Painter
Virginia Beach, Virginia

In article hqdCd.13035$622.3888@lakeread02,
Jack Painter wrote:
"Joel Rubin" wrote
On Sun, 2 Jan 2005 09:03:24 -0500, "HankG" wrote:

Just curious. Anyone know what the longest GC distance from any point on
Earth to any other point?

Of course, the original definition (not the current definition) of the
meter was 1/10-millionth of the distance between the north pole and
the quator. So, presumably, the distance from pole to pole is 20
million meters or 20,000 km.

The earth is not quite a sphere - I believe the equator is slightly
longer than a circle of longitude.

I was not aware there was ever any intention to make a kilometer relational
to a nautical mile. It is not, and is just as arbitrary a length of
measurement in relationship to a nautical mile (which derives from the
spherical geometry of all modern positioning) as the statute (English) mile.
Metric arithmetic is certainly easier (for humans, computers could care
less) than statute miles. But both are arbitrary as far as latitude and
longitude are concerned and each require an equal effort of arithmetic to
convert to nautical miles. Air and marine charts use nautical miles for this
reason.

Duh. The nautical mile is tied to the babylonian units for angle.
(1 minute of arc on the earths surface is one nautical mile.
Which arc they used varied, so different countries nautical miles
were a bit different).

The metric system uses the Grad, where the circle is divided into.
400 units.

1 Grad of Latitude = 100 km.

I thought the military used Grads, but maybe that's just Army Artillery.

Mark Zenier Washington State resident

"Mark Zenier" wrote
In article hqdCd.13035$622.3888@lakeread02,
Jack Painter wrote:
"Joel Rubin" wrote
On Sun, 2 Jan 2005 09:03:24 -0500, "HankG" wrote:

Just curious. Anyone know what the longest GC distance from any point
on
Earth to any other point?

Of course, the original definition (not the current definition) of the
meter was 1/10-millionth of the distance between the north pole and
the quator. So, presumably, the distance from pole to pole is 20
million meters or 20,000 km.

The earth is not quite a sphere - I believe the equator is slightly
longer than a circle of longitude.

I was not aware there was ever any intention to make a kilometer
relational
to a nautical mile. It is not, and is just as arbitrary a length of
measurement in relationship to a nautical mile (which derives from the
spherical geometry of all modern positioning) as the statute (English)
mile.
Metric arithmetic is certainly easier (for humans, computers could care
less) than statute miles. But both are arbitrary as far as latitude and
longitude are concerned and each require an equal effort of arithmetic to
convert to nautical miles. Air and marine charts use nautical miles for
this
reason.

Duh. The nautical mile is tied to the babylonian units for angle.
(1 minute of arc on the earths surface is one nautical mile.
Which arc they used varied, so different countries nautical miles
were a bit different).

The metric system uses the Grad, where the circle is divided into.
400 units.

1 Grad of Latitude = 100 km.

I thought the military used Grads, but maybe that's just Army Artillery.

Mark Zenier Washington State resident


"DUH" ??? (you sure you're not Canadian?)

Artillery is not navigation. The Army changed to metric because it couldn't
teach arithmetic that didn't use the 10-fingers/10-toes concept. All well
and good except that left it with no way to make the kilometer into anything
relational to the earth or navigational geometry, which it has neither in
common with. Hence the GRAD, which does NOT refer to having completed more
than six GRADES, or knowing anything about navigation. If you're trying to
get somewhere over the horizon instead of hitting it with a howitzer, then
reading "Practical Navigation:" by Bowditch will be much more useful than
anything the Army taught you.

Hooo-Awww
Jack Painter
Virginia Beach, Virginia

I am used to the old American style of measurments.I can easily enough
picture in my mind how long an inch,foot,mile is.I can fairly easily
picture how large a square inch,square foot,square mile is.I couldn't
care less than less about metrics,kilometers,stuff like that.When I did
my boot camp at Fort Gordon,Georgia (Company D 5 2) in November and
December of 1962,one of our classes there was guessing how many feet
from point A to point B is.I was off by quite a few feet on that.I know
about how much longer a kilometer is than a mile,1.40,I think a
kilometer is.But still,I have no interest at all in learning metrics.To
me,it is sort of like if you come to America,speak English language,I am
NOT! going to learn your foreign language!
cuhulin

21,585 nautical miles from my location to my location via longpath!

Mark.
Auckland
New Zealand.