Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Robin G. Stuart"'
Publikováno v:
Journal of Navigation. 75:1269-1279
In 1915 while the Imperial Trans-Antarctic Expedition's vessel Endurance was icebound in the Weddell Sea, lunar occultation timings were carried out in order to rate the chronometers and thereby find longitude. The original observations have been re-
Autor:
Robin G. Stuart, Lars Bergman
Publikováno v:
Journal of Navigation. 74:212-233
During his 1869 expedition down the Green River and through the Grand Canyon, Major John Powell made astronomical observations using a sextant and artificial horizon to fix the locations of key points along the rivers that were only poorly known at t
Autor:
Robin G. Stuart
Publikováno v:
Journal of Navigation. 72:1496-1512
A round of three celestial sights yields three lines of position along which the observer's true position could lie. Due to measurement errors, the lines of position do not intersect at a point but rather form a triangle called the “cocked hat”.
Autor:
Lars Bergman, Robin G. Stuart
Publikováno v:
Journal of Navigation. 72:257-268
The location of the wreck of Shackleton's ship the Steam Yacht Endurance is recorded in the expedition log books as 68°39′30′′S 52°26′30′′W. The methods and assumptions that went into obtaining this fix are examined in detail by consult
Autor:
Robin G. Stuart
Publikováno v:
Journal of Navigation. 70:618-627
Mapping points on the Riemann sphere to points on the plane of complex numbers by stereographic projection has been shown to offer a number of advantages when applied to problems in navigation traditionally handled using spherical trigonometry. Here
Autor:
Robin G. Stuart
Publikováno v:
Journal of Navigation. 70:440-445
The running fix or sight-run-sight fix is a classic problem in celestial navigation. Methods employed to obtain the fix traditionally involve advancing a Line of Position (LoP) taken at an earlier time and crossing it with one obtained later. Attempt
Autor:
Robin G. Stuart
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 400:1366-1372
Points on the surface of a sphere can be mapped by stereographic projection to points on the plane of complex numbers. If the points on the sphere are identified with the directions of incoming light rays, then the effect of a Lorentz transformation,
Autor:
Robin G. Stuart
Publikováno v:
Navigation. 56:221-227
Mapping points on a sphere by stereographic projection to points on the plane of complex numbers transforms the spherical trigonometry calculations performed in the course of celestial navigation into arithmetic operations on complex numbers. Rotatio
Autor:
Robin G. Stuart
Publikováno v:
The European Physical Journal C. 4:259-263
The process e + e ! ee W + ! ee u d is considered as an example of the problems associated with maintaining gauge invariance in matrix elements involving unstable particles. It is shown how to construct a matrix element that correctly treats width ee
Autor:
Robin G. Stuart
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 276:476-482