Line of Position - Revision history

Mxmsj: /* Do all observers see the sun at the same location at dawn? */

2010-09-17T12:13:50Z

Do all observers see the sun at the same location at dawn?

← Older revision		Revision as of 14:13, 17 September 2010
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	* [http://www.screencast.com/users/moleski/folders/Jing/media/73a20fbf-e651-4b47-88a3-3e0a01c14324 Sun's motion from solstice to solstice]		* [http://www.screencast.com/users/moleski/folders/Jing/media/73a20fbf-e651-4b47-88a3-3e0a01c14324 Sun's motion from solstice to solstice]
	== Do all observers see the sun at the same location at dawn? ==		== Do all observers see the sun at the same location at dawn? ==
	* Pretty nearly. It doesn't vary as much as I predicted from drawing 2 dimensional pictures of the 3 dimensional reality.		Pretty nearly. It doesn't vary as much as I predicted from drawing 2 dimensional pictures of the 3 dimensional reality.

	~~Date:~~ 11 September 2010.		I collected these charts and tables on 11 September 2010, which is close to the fall equinox. At dawn, someone near Buffalo would see the sun at 83.1 degrees, which would generate LOP perpendicular to the sun sighting of 353-173. The sunrise azimuth at Howland would be 85.59 and 85.65 at Niku, giving a LOP of 355-175.

			I don't know whether the difference is due to the earth not being a perfect sphere or solely to the difference in the latitude of the observers.

	Source: [http://www.sunearthtools.com/dp/tools/pos_sun.php www.sunearthtools.com - Sun position calculator:]		Source: [http://www.sunearthtools.com/dp/tools/pos_sun.php www.sunearthtools.com - Sun position calculator:]

2010-09-17T12:03:05Z

Do all observers see the sun at the same location at dawn?

← Older revision		Revision as of 14:03, 17 September 2010
Line 2:		Line 2:
	== Do all observers see the sun at the same location at dawn? ==		== Do all observers see the sun at the same location at dawn? ==
	* Pretty nearly. It doesn't vary as much as I predicted from drawing 2 dimensional pictures of the 3 dimensional reality.		* Pretty nearly. It doesn't vary as much as I predicted from drawing 2 dimensional pictures of the 3 dimensional reality.

			Date: 11 September 2010.

	Source: [http://www.sunearthtools.com/dp/tools/pos_sun.php www.sunearthtools.com - Sun position calculator:]		Source: [http://www.sunearthtools.com/dp/tools/pos_sun.php www.sunearthtools.com - Sun position calculator:]
	=== Howland ===		=== Howland ===

2010-09-15T04:56:02Z

Gallery

← Older revision		Revision as of 06:56, 15 September 2010
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	== Gallery ==		== Gallery ==

	~~<div align="center">~~		[[File:Terminator.png]]
	~~<gallery>~~
	File:Terminator.png		[[File:Summer solstice 2 overlaid.png]]
	File:Summer solstice 2 overlaid.png
	File:Winter solstice 2.png		[[File:Winter solstice 2.png]]
	File:Summer ~~solstice~~ diagram.~~svg~~
	File:Winter ~~solstice~~ diagram.~~svg~~		[[File:Summer diagram.png\|240px]]
	~~</gallery>~~
	~~</div>~~		[[File:Winter diagram.png\|240px]]

2010-09-14T18:50:41Z

Near Buffalo

@@ Line 52: / Line 52: @@
 [[File:2010-09-11 Buffalo chart.png]]
 [[File:2010-09-11 Buffalo table.png]]
 </div>

2010-09-11T23:46:14Z

← Older revision		Revision as of 01:46, 12 September 2010
Line 1:		Line 1:
	* [http://www.screencast.com/users/moleski/folders/Jing/media/73a20fbf-e651-4b47-88a3-3e0a01c14324 Sun's motion from solstice to solstice]		* [http://www.screencast.com/users/moleski/folders/Jing/media/73a20fbf-e651-4b47-88a3-3e0a01c14324 Sun's motion from solstice to solstice]
	== Do all observers see the sun at the same location at dawn? ==		== Do all observers see the sun at the same location at dawn? ==
			* Pretty nearly. It doesn't vary as much as I predicted from drawing 2 dimensional pictures of the 3 dimensional reality.
	Source: [http://www.sunearthtools.com/dp/tools/pos_sun.php www.sunearthtools.com - Sun position calculator:]		Source: [http://www.sunearthtools.com/dp/tools/pos_sun.php www.sunearthtools.com - Sun position calculator:]
	=== Howland ===		=== Howland ===
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	\|-		\|-
	\|Sunrise Azimuth		\|Sunrise Azimuth
	\|		\|85.59
	\|}		\|}
	<div align="center">		<div align="center">
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	\|-		\|-
	\|Sunrise Azimuth		\|Sunrise Azimuth
	\|		\|85.65
	\|}		\|}
	<div align="center">		<div align="center">
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	\|-		\|-
	\|Sunrise Azimuth		\|Sunrise Azimuth
	\|		\|83.1
	\|}		\|}
	<div align="center">		<div align="center">

2010-09-11T23:42:54Z

← Older revision		Revision as of 01:42, 12 September 2010
Line 3:		Line 3:
	Source: [http://www.sunearthtools.com/dp/tools/pos_sun.php www.sunearthtools.com - Sun position calculator:]		Source: [http://www.sunearthtools.com/dp/tools/pos_sun.php www.sunearthtools.com - Sun position calculator:]
	=== Howland ===		=== Howland ===
	{\|		{\|{{Prettytable}}
	\|-		\|-
	\|Latitude		\|Latitude
Line 10:		Line 10:
	\|Longitude		\|Longitude
	\|176.61624		\|176.61624
			\|-
			\|Sunrise Azimuth
			\|
	\|}		\|}
	<div align="center">		<div align="center">
Line 17:		Line 20:

	=== Niku ===		=== Niku ===
	{\|		{\|{{Prettytable}}
	\|-		\|-
	\|Latitude		\|Latitude
Line 24:		Line 27:
	\|Longitude		\|Longitude
	\|174.5196		\|174.5196
			\|-
			\|Sunrise Azimuth
			\|
	\|}		\|}
	<div align="center">		<div align="center">
Line 31:		Line 37:

	=== Near Buffalo ===		=== Near Buffalo ===
	{\|		{\|{{Prettytable}}
	\|-		\|-
	\|Latitude		\|Latitude
Line 38:		Line 44:
	\|Longitude		\|Longitude
	\|78.82926		\|78.82926
			\|-
			\|Sunrise Azimuth
			\|
	\|}		\|}
	<div align="center">		<div align="center">

2010-09-11T17:27:20Z

Niku

2010-09-11T17:26:47Z

Buffalo

2010-09-11T17:26:12Z

Niku

2010-09-11T17:25:38Z

Howland

← Older revision		Revision as of 19:25, 11 September 2010
Line 3:		Line 3:
	Source: [http://www.sunearthtools.com/dp/tools/pos_sun.php www.sunearthtools.com - Sun position calculator:]		Source: [http://www.sunearthtools.com/dp/tools/pos_sun.php www.sunearthtools.com - Sun position calculator:]
	=== Howland ===		=== Howland ===
			{\|
			\|-
			\|Latitude
			\|0.80108
			\|-
			\|Longitude
			\|176.61624
			\|}
	<div align="center">		<div align="center">
	[[File:2010-09-11 Howland chart.png]]		[[File:2010-09-11 Howland chart.png]]
	[[File:2010-09-11 Howland table.png]]		[[File:2010-09-11 Howland table.png]]
	</div>		</div>

	=== Niku ===		=== Niku ===
	<div align="center">		<div align="center">