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    Re: Sextant practice, experimentation --Saturday in RI.
    From: G Becker
    Date: 2013 Oct 3, 12:06 -0400



    I was not present at the meeting. It was mentioned a geodetic monument was located at the site. The pdf file I attached listed all the geodetic monuments at that location and their reference points. I realize the information was after the fact, but I assume Frank and others live near the site. Using the monument Beavertail and back sighting the reference monuments, a person could set a new reference point at the waters edge. The new reference point could have a “precise” possibly accurate location and elevation*, usable at any desired time in the foreseeable future.


    * Running elevation with a theodolite is a bad practice.


    -----Original Message-----
    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Antoine Couëtte
    Sent: Thursday, October 03, 2013 11:22 AM
    To: george@gwbeckerpls.com
    Subject: [NavList] Re: Sextant practice, experimentation --Saturday in RI.


    RE : http://fer3.com/arc/m2.aspx/Sextant-practice-experimentation-Saturday-RI-Pennino-sep-2013-g25232

    Hello Bruce,

    Hello to you too M. G Becker,

    Thanks for your data.

    Sorry for my query : what was exactly your WGS 84 Position ? I am a bit confused at the explanation given in " http://fer3.com/arc/imgx/BEAVER-CONTROL.pdf " as an appendix to " http://fer3.com/arc/m2.aspx?i=125240 " by G Becker .

    Best regards


    Antoine M. Couëtte


    Re: Sextant practice, experimentation --Saturday in RI.
    From: Bruce J. Pennino
    Date: 2013 Sep 29, 10:08 -0400
    Previous messageNext messageReply to this message

    We met at Beavertail Light and had a good day. Perfect weather. The "Light" Association is building a new platform on the old Light Foundation. FER and I surveyed the elevation of the ground on the south side of the road, just south of the fog horn device; at the edge of the bluff. The ground at this point is very close to the elevation of the new platform. The ground elevation is 25 ft more or less above MSL. FER may want to refine this value.

    With my total station I had a HoE of 29.6 ft when I measured a dip angle (mean) of 5 min 14 seconds. Air temp was 64 F, water temp, 65 F, atmos. P 30.27 ", Wind {at} 6 mph. Frank and I used the theodolite to sight the UL of moon. I read the angles and FER observed time GPS/UT

    Herewith are the ZENITH angles where 0 deg is vertical with times:

    GMT/UT 16 hr 36 min 38.3 seconds ZD 66d 18' 09"

    16 hr 37 min 42.7 seconds ZD 66 d 30' 03"

    The fractional second of time is estimated by FER

    An excellent location for walking, picnics, and CN observations. Crowded and busy on weekends, but plenty of parking.

    Best regards,

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