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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Irradiation and manual navigation
From: Richard M Pisko
Date: 2010 Mar 11, 21:01 -0700
From: Richard M Pisko
Date: 2010 Mar 11, 21:01 -0700
On Sun, 07 Mar 2010 12:45:12 -0700, Douglas Dennywrote: > The results of approximately 1200 measurements made during nine flights > confirm results of simulator and groundbased studies which indicate > that, with a hand-held sextant, an astronaut can be expected to make > navigational measurements with errors having a standard deviation of > approximately +/- 10 arc seconds. > A value for moon irradiance effect of approximately 25 arc seconds was > established for the conditions of the experiment using a hand-held > sextant. > ENDS. To me, this 1/2 minute of arc seems reasonable. Thank you for your further research. -- Richard . . . Using Opera 10