NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Standard sea level temperature and pressure
From: Gary Harkins
Date: 2003 Jan 13, 17:59 EST
From: Gary Harkins
Date: 2003 Jan 13, 17:59 EST
In a message dated 1/13/2003 5:27:54 PM Eastern Standard Time, marc.bernstein@ATT.NET writes:
They can't be...refraction is an actual measurement of how much the atmosphere is bending light rays. 10C/1010mb has to cause NO additional bending of the light rays, not just a reference. If you compare column A with column N on any given row you will see that the values are the same, just opposite signs. If the values were different then I would say that 10C/1010mb was just a convenient reference. But since they are the same I would say that 10C/1010mb and other representations in G are causing no additional bending of the light.
Gary Harkins C400 #140 "Cygnus"
Website http://www.hometown.aol.com/htycgary/myhomepage/index.html
Harbour Towne Marina, Muskegon, Michigan Slip C-28
Harbour Towne Yacht Club, Life Member
C400 National Association
United States Power Squadrons-JN
NRA Life Member
MCRGO (Michigan Coalition for Responsible Gun Owners)
JPFO (Jews for the Preservation of Firearms Ownership)
Are the constants in the equation for calculating refraction set so that refraction is 0 at 10C/1010mb? If so they could also have been chosen to make it 0 for 15C/1013mb?
They can't be...refraction is an actual measurement of how much the atmosphere is bending light rays. 10C/1010mb has to cause NO additional bending of the light rays, not just a reference. If you compare column A with column N on any given row you will see that the values are the same, just opposite signs. If the values were different then I would say that 10C/1010mb was just a convenient reference. But since they are the same I would say that 10C/1010mb and other representations in G are causing no additional bending of the light.
Gary Harkins C400 #140 "Cygnus"
Website http://www.hometown.aol.com/htycgary/myhomepage/index.html
Harbour Towne Marina, Muskegon, Michigan Slip C-28
Harbour Towne Yacht Club, Life Member
C400 National Association
United States Power Squadrons-JN
NRA Life Member
MCRGO (Michigan Coalition for Responsible Gun Owners)
JPFO (Jews for the Preservation of Firearms Ownership)
