How to determine lat and long from AZ/EL?

Hi,

Does anyone know what information is needed to determine a
latitude/longitude based on Orbital Mechanics?

Using the Sun as my base object in the sky,


Azimuth - 80 .24512°

Elevation - 16.42940°

Date/Time - 5 / 10 / 1863 @ 15:15.00

Viewed from :

N 38 51.608 W 77 27.859



How can I determine a second latitude/longitude on earth?

Thanks for any help / ideas.


Mary

"MaryMiniuk" wrote in message
...
Hi,

Does anyone know what information is needed to determine a
latitude/longitude based on Orbital Mechanics?

Using the Sun as my base object in the sky,


Azimuth - 80 .24512°

Elevation - 16.42940°

Date/Time - 5 / 10 / 1863 @ 15:15.00

Viewed from :

N 38 51.608 W 77 27.859



How can I determine a second latitude/longitude on earth?

Thanks for any help / ideas.

It's not clear what it is you're looking for. What is
"a second latitude/longitude"? Are you looking for the
sub solar point?

It was confusing, because I was confused!
Thanks for responding. Now that I am awake, I can be a little clearer.

It is my understanding that you can determine a latitude, and
longitude based on the Azimuth and Elevation of the sun, at a specific
time and date.

So, if it was May 10, 1863, at 3:15 PM EST, what latitude and
longitude would I be at if I saw the sun at an Azimuth of 80 .24512°
and an Elevation of 16.42940°.

How can I figure this out?

Thanks
Mary


On Fri, 23 Jan 2004 09:46:30 -0500, "Greg Neill"
wrote:

"MaryMiniuk" wrote in message
.. .
Hi,

Does anyone know what information is needed to determine a
latitude/longitude based on Orbital Mechanics?

Using the Sun as my base object in the sky,


Azimuth - 80 .24512°

Elevation - 16.42940°

Date/Time - 5 / 10 / 1863 @ 15:15.00

Viewed from :

N 38 51.608 W 77 27.859



How can I determine a second latitude/longitude on earth?

Thanks for any help / ideas.

It's not clear what it is you're looking for. What is
"a second latitude/longitude"? Are you looking for the
sub solar point?

"MaryMiniuk" wrote in message
...

It was confusing, because I was confused!
Thanks for responding. Now that I am awake, I can be a little clearer.

It is my understanding that you can determine a latitude, and
longitude based on the Azimuth and Elevation of the sun, at a specific
time and date.

So, if it was May 10, 1863, at 3:15 PM EST, what latitude and
longitude would I be at if I saw the sun at an Azimuth of 80 .24512°
and an Elevation of 16.42940°.

How can I figure this out?

If you know the time accurately, you can use an orbital
theory to fix the actual location of the Sun and Earth
at that time, along with the orientation of the Earth
due to rotation (sidereal time). This will fix the
sub-solar point, that is, where on the Earth's surface
the Sun is directly overhead. After that it's just
spherical trigonometry to determine where you would need
to be to see the Sun at the location you measured.

You can find utilities and programs on the net to calculate
the Sun's position for any given time, and the sidereal
time from standard time, etc.