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Frank Swannell Diaries: Part I

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created by 65.61.234.59		 Revision as of May 17, 2015, 7:34:47 PM
edited by 65.61.234.59
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                                                           5.  "    Height above sea
 
                                                           5.  "    Height above sea
  
−
2 (...)
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(2) Steel expands  625/10,000000 (.00000625) of its length for 1(degree) Fahrn
  
 
(4) Sag Let s = Correction for sag
 
(4) Sag Let s = Correction for sag
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                      l = length in feet between supports
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                    w = weight of tape in lbs
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                      t = tension applied in lbs
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                                s = l w2/2t2 approx
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(5) Reduction of Measurements To Mean Sea Level
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h = mean ht. ab. sea level          R = rad. Earth (20,900,000 ft)
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Corr = h/R x length of base
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Measured Length say 5301    Altitude 4520'
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Correction = -4520x5301/20,900,000 = -1.146'
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19:34, 17 May 2015 (PDT)19:34, 17 May 2015 (PDT)19:34, 17 May 2015 (PDT)[[Special:Contributions/65.61.234.59|65.61.234.59]]
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Contour Intervals 50/Inches To Mile
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Practical Astronomy
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Parallax in attitude is the angular depression of a celestial body, in consequence of its being seen from the surface instead of center of the earth
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            ASC-LTSU -- Parallax in attitude
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              Always additive
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When @ is on the horizon, depression or parallax greatest - "Horizontal Parallax" (of sun abt 9"
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Astronomical Refraction 0 at Zenith 34' at Horizon
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________________________________________
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27th November 1914 - Pass Medical Examination & Enlist for Active Service Cop  B. 88th Victoria Fusiliers
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________________________________________
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BC Archives, MS-0392    FRANK SWANNELL PAPERS
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Box 1                                  Diary and enclosures, 1915
 +
Volume 4

Revision as of May 17, 2015, 7:34:47 PM

MEMORANDA.

Base Computations. Corrections: 1. For Standart 

                                                         2.  "    Temperature
                                                         3.  "    Inclination
                                                         4.  "    sag
                                                         5.  "    Height above sea

(2) Steel expands 625/10,000000 (.00000625) of its length for 1(degree) Fahrn

(4) Sag Let s = Correction for sag 

                     l = length in feet between supports
                    w = weight of tape in lbs
                     t = tension applied in lbs
                                s = l w2/2t2 approx


(5) Reduction of Measurements To Mean Sea Level h = mean ht. ab. sea level R = rad. Earth (20,900,000 ft) Corr = h/R x length of base Measured Length say 5301 Altitude 4520' Correction = -4520x5301/20,900,000 = -1.146'

19:34, 17 May 2015 (PDT)19:34, 17 May 2015 (PDT)19:34, 17 May 2015 (PDT)65.61.234.59

Contour Intervals 50/Inches To Mile


Practical Astronomy

Parallax in attitude is the angular depression of a celestial body, in consequence of its being seen from the surface instead of center of the earth 

            ASC-LTSU -- Parallax in attitude
              Always additive

When @ is on the horizon, depression or parallax greatest - "Horizontal Parallax" (of sun abt 9" Astronomical Refraction 0 at Zenith 34' at Horizon

________________________________________ 27th November 1914 - Pass Medical Examination & Enlist for Active Service Cop B. 88th Victoria Fusiliers ________________________________________

BC Archives, MS-0392 FRANK SWANNELL PAPERS Box 1 Diary and enclosures, 1915 Volume 4