NavList:
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Re: Exercise #18 Daylight 3-body fix.
From: Michael Dorl
Date: 2009 Feb 28, 13:32 -0600
From: Michael Dorl
Date: 2009 Feb 28, 13:32 -0600
Anabasis wrote:
Aires = 100.7797 Time offset = 0
Star Decl SHA GHA Alt T_Day D M Year T_Year C_GHA Aires
venus -11.458 24.675 231.409 44.258 6.717 6 1 2009 126.717 231.409 206.734
moon 18.982 324.715 171.641 35.644 6.729 6 1 2009 126.729 171.641 206.926
sun -22.473 72.556 279.758 16.739 6.748 6 1 2009 126.748 279.758 207.202
Star1 Star2 Lat1 Lng1 Lat2 Lng2
venus moon 34.281 230.888 -33.262 187.352
venus sun 34.282 230.996 -42.148 192.394
moon sun 34.188 230.888 -29.647 196.834
Average location 34.2501 230.9240
And on the map
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I don't know anything about the classical methods but wonder how close I came by direct calculation. I did not allow for the movement of the ship between the sights or refraction.A ship is sailing in the East China Sea on 6 January 2009. The course is 195 degrees True and is steaming at 10.5 knots. The 1530L fix is Lat 34 deg 21.5N'; longitude 128 deg 55.4'E. IE is 0.8' on the arc, height of eye is 107 feet, standard temp and pressure. Around 1545L (0645 UTC) a 3-body fix is taken. Determine Latitude and Longitude at 1545L. At 15h 43m Venus is observed at meridian transit with an Hs of 44 deg 25.8' At 15h 43m 46s the upper limb of the moon is observed with an Hs of 35d 57.0' At 15h 44m 52s the lower limb of the sun is observed with an Hs of 16d 46.5'
Aires = 100.7797 Time offset = 0
Star Decl SHA GHA Alt T_Day D M Year T_Year C_GHA Aires
venus -11.458 24.675 231.409 44.258 6.717 6 1 2009 126.717 231.409 206.734
moon 18.982 324.715 171.641 35.644 6.729 6 1 2009 126.729 171.641 206.926
sun -22.473 72.556 279.758 16.739 6.748 6 1 2009 126.748 279.758 207.202
Star1 Star2 Lat1 Lng1 Lat2 Lng2
venus moon 34.281 230.888 -33.262 187.352
venus sun 34.282 230.996 -42.148 192.394
moon sun 34.188 230.888 -29.647 196.834
Average location 34.2501 230.9240
And on the map
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Navigation List archive: www.fer3.com/arc
To post, email NavList@fer3.com
To , email NavList-@fer3.com
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