By Charles A. Whitten, Kenneth H. Drummond
About The Product
Published by means of the yank Geophysical Union as a part of the Geophysical Monograph Series.
The winning launchings of high-altitude rockets and synthetic Earth satellites have opened a brand new period within the number of geophysical facts. the applying of those new suggestions would require the mixed principles, reviews, and companies of scientists in a wide selection of disciplines. as an instance, any efforts within the number of geodetic facts will inevitably draw jointly a number of fields of exercise open air of geodesy, resembling astronomy, rocketry, and electronics, to call a couple of.
In acceptance of this, many American geodesists expected the necessity of a convention on modern Geodesy for the interchange of data and ideas between scientists in definite fields relating to the hot area age. the aim of this kind of convention was once now not only to orient different scientists in smooth geodesy, yet simply as importantly to enlighten the geodesist in these sciences required in area software to his challenge.
Read Online or Download Contemporary Geodesy: Proceedings of a Conference Held at the Harvard College Observatory - Smithsonian Astrophysical Observatory, Cambridge, Massachusetts, December 1-2, 1958 PDF
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Extra info for Contemporary Geodesy: Proceedings of a Conference Held at the Harvard College Observatory - Smithsonian Astrophysical Observatory, Cambridge, Massachusetts, December 1-2, 1958
His conclusions are in agreement with my own. Mr. Julius L. Speert—I hate to disagree too strongly with Aslakson as most of my objections were gotten from him I think most of us recognize the basic weakness of the geometry of trilateration. In fact, that point was brought out earlier in Ewing's figures. The single triangle, while it is a checked figure in triangulation, is not checked in trilateration. Similarly, in a quadrilateral, there are three checks in triangulation, but only one on trilateration.
You would not know whether you were using Hotine's or Helmert's method. Where the elevations are all the same, the coefficients are essentially the same. I think that Hotine would object to any suggestion that the astronomic quantities be omitted. He was very emphatic that they be used. Dr. O'Keefe—Then you are in a different world from that which we actually have to live in geodesy. The crux of the problem is what do we do when we do not have astronomy. What is the best guess of the vertical in a new station?
Veis—I am not referring to any azimuth but just direction cosines with respect to a system as defined by the mean astronomical meridian of Greenwich and the axis of rotation of the Earth. Mr. Whitten—Then you must refer that to some system of points on the ground and how do you propose to do that? Dr. Veis—The transformation from the sidereal system to the terrestrial system can be made easily by rotation using the result of the International Latitude Service and the Bureau International de l'Heure.