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-21
Ankerpladäfen paa Vestsiden ligger 10."9 nordligere og l’
49."1 vestligere end Fugleberget. Ankerpladsen paa
Vestsiden ligger altsaa 2’ ’l’. "3 nordligere og 4’ 27" vestligere
end Ankerpladsen paa Østsiden. Er for den sidste (p0 =
70° 58/0 og lo = 0* 33"’ 48/3, saa bliver for
Ankerpladsen paa Vestsiden rp0 = 71° 0’ 1" og 10 =: 0h 34"1 6/1.
Efter de mindste Kvadraters Methode beregnede jeg
de sandsynligste Correctioner til rp0 og
Naar jeg derefter grupperede Differentserne (hvis
Kvadratsum er Minimum) mellem de observerede
(reducerede) Højder af Solcentret og de eftér de fundne
sandsynligste Værdier for Bredden og Længden beregnede, efter
de observerede Solrender, viste det sig, at
Middeldifferent-sen for øvre Rand var -{-. 0/295 og for nedre Rand
— 0/282. Den observerede Solradius er saaledes
gjennemsnitlig jp/3 større end den til Beregningen benyttede.
Corrigeres med denne Størrelse, faaes ele i den følgende
Tabel anførte Værdier af Differentserne J mellem
observeret minus beregnet Solhøjde. I Tabellen ere alle
Uhr-tider reducerede til Reid, og alle maalte Solhøjder
corri-gerede for Indexfejl. Kimmingdaling, Refraction, Parallaxe
og Solradius (Naut. Almanac’s), o betegner øvre Solrand,
n nedre Solrand. Aflæsningerne paa Sextanten ere gjorte
i Secunder og Reductionen udført med Secunder, men da
den sandsynlige Fejl af en enkelt Højde er over et halvt
Minut, opføres i Tabellen Tiendedels Minut, ligesom
Beregningen efter de mindste Kvadraters Methode er ført
med femzifrede Logarithmer.
anchorage oft" the east coast. From the foot of the
Fugleberg. the height of the mast, as measured by myself on
the 29th of July, gave an angle of 0" 55/5, which
corresponds to a distance of 0/62. At this point, the azimuth
of the ship from the Fugleberg was about 70°. Computing
with these results, our anchorage oft’ the west coast should
lie 10."9 farther north and l’ 49."1 farther west than the
Fugleberg. Hence, the anchorage oft’ the west coast lies
2’ 1/3 farther north and 4’ 27" farther west than the
anchorage oft the east coast. Assuming for the latter y „
= 70" 58/0 and l0 = O’1 33’" 48/3. for the anchorage off
the west coast rp0 = 71° O’ 1" and l0 — 0A ’34m 6/1.
By the method of the least squares, I computed the
most probable corrections of ff o and
Then, on grouping the differences (the sum of the
squares of which is a minimum) between the observed
(duly corrected) altitudes of the sun’s centre and those
computed with the most probable values found for latitude
and longitude,. according to the observed solar limbs, the
mean difference for the upper limb proved to be -j- 0/295,
and for the lower — 0/282. On an average, therefore,
the observed semidiameter of the sun is 0/3 greater than
that taken for the computation. Corrected with this
quantity. we get the values given in the following Table for
the differences. _/, between the observed and the computed
solar altitudes. In this Table all chronometer-times are
reduced to those of the Reid chronometer, and all observed
altitudes corrected for the index-error, the dip of the
horizon. refraction, parallax, and the sun’s semidiameter (from
Naut. Almanac); o signifies upper solar limb, n lower solar
limb. The readings of the sextant were noted in seconds,
and their reduction computed in seconds; but the probable
error of a single altitude amounting to more than half a
minute, tenths of a minute have been given in the Table.
The computation by the method of the least squares is
made with five decimals in the logarithms.
Ankerplads paa Vestsiden. 1877. Juli 30.
(Anchorage on the West Side. 1877. July 30.) •
Chron. Reid. Obs. Højde. (06s. Altitude.) Rami. (Limb.) Sext. Obs. J
5* 47" 28’ 20° 57.’2 n. ’E. G. + 0/9
5 48 I 20 56. 4 S. M. — 1-3
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