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Fundamental observations made at Breslau in 1922-1925

International Astronomical Union Colloquium ◽

10.1017/s025292110007439x ◽

1978 ◽

Vol 48 ◽

pp. 433-435

Author(s):

F. Schmeidler

Keyword(s):

The Sun ◽

Vertical Circle ◽

Right Ascension

Meridian observations of fundamental stars were made at Breslau Observatory in 1922 to 1925. The observations in right ascension were made by W.Rabe with the 6-inch transit instrument, whereas the declinations were observed by A.Wilkens with the vertical circle. In both coordinates, observations of the Sun were also made.

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The Modernization of the Pulkovo Photographic (Photoelectric) Vertical Circle by a CCD Array

New Developments in Array Technology and Applications ◽

10.1007/978-94-011-0383-1_47 ◽

1995 ◽

pp. 333-334

Author(s):

G. A. Goncharov ◽

B. K. Bagildinsky ◽

E. V. Kornilov ◽

D. D. Polojentsev ◽

K. V. Rumyantsev ◽

...

Keyword(s):

Vertical Circle ◽

Ccd Array

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LATITUDE DETERMINATION WITHOUT VERTICAL CIRCLE READINGS

Empire Survey Review ◽

10.1179/sre.1956.13.102.380 ◽

1956 ◽

Vol 13 (102) ◽

pp. 380-383

Author(s):

I. G. Bowie

Keyword(s):

Vertical Circle

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On a new great theodolite to be used on the great trigonometrical survey of india, with a short note on the performance of a zenith-sector employed on the same work

Proceedings of the Royal Society of London ◽

10.1098/rspl.1871.0073 ◽

1872 ◽

Vol 20 (130-138) ◽

pp. 372-374

Keyword(s):

Short Note ◽

Vertical Axis ◽

Spare Parts ◽

Total Weight ◽

Vertical Circle ◽

Horizontal Circle

Since my paper with the above title was read, it has occurred to me that some particulars as to the weight of the instrument might interest those engaged practically in Geodesical work. The following are the weights of the main parts as separated for carriage:— (1) Stand , with Levelling-apparatus complete ..... 108 (2) Iron Circle of Stand with 3 Centering-Screws ... 156 (3) Tribrach , with Horizontal Circle, Guard ditto, Vertical Axis, and Relieving-apparatus ....... 180 (4) Vertical-Axis Socket , with 5 Horizontal-Microscope arms, Elliptical Table, Pillars, 2 Azimuthal Levels, 2 Vertical ditto, 2 Vertical Microscopes, 2 Pointer ditto, Horizontal Tangent-Screw plates ........ 235 (5) Telescope , with Vertical Circle ........... 64 (6) Miscellaneous appliances and spare parts (about) ........ 130 Weight of Instrument ............................................ 873 (7) Aggregate weight of field packing-cases, assumed at 2/3 the weight of contents ... 582 Total weight of Instrument in field-cases ...................... 1455

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STUDY OF THE ELECTRONIC TOTAL STATION TRAVEL FOCUSING LENS MOVEMENT INFLUENCE ON THE SIGHTING AXIS POSITION

Interexpo GEO-Siberia ◽

10.33764/2618-981x-2021-1-93-99 ◽

2021 ◽

Vol 1 ◽

pp. 93-99

Author(s):

Anton V. Nikonov ◽

Nadezhda M. Ryabova ◽

Sergey P. Alekseev

Keyword(s):

Construction Site ◽

Laboratory Studies ◽

Total Station ◽

Vertical Circle ◽

Geodetic Measurements ◽

Industrial Buildings ◽

Angular Measurements ◽

Speed Up ◽

Axis Position ◽

Focusing Lens

When carrying out geodetic work inside production shops or on a construction site, it is necessary to significantly change the focusing of the telescope. Refocusing the telescope can lead to a shift in the sighting axis, and, accordingly, to a decrease in the accuracy of angular measurements. The article presents the results of laboratory studies to determine the horizontal error of collimation and vertical index error of the Leica total station for distances from 2 to 84 m. Therefore, after checking the collimation and vertical index error and automatically taking into account their influence, it is allowed performing geodetic measurements at one position of the vertical circle. In particular, this makes it possible to speed up the execution of fan-shaped trigonometric leveling with short sights, which is performed when observing the settlements of the foundations of industrial buildings and structures.

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Commission 8. (Meridian Astronomy.)

Transactions of the International Astronomical Union ◽

10.1017/s0251107x00016680 ◽

1933 ◽

Vol 4 ◽

pp. 225-226

Author(s):

Frank Dyson ◽

J. H. Oort

Keyword(s):

Southern Hemisphere ◽

Special Interest ◽

Variable Stars ◽

Meridian Circle ◽

Pulkovo Observatory ◽

Southern Latitude ◽

Financial Conditions ◽

Vertical Circle ◽

Short Period ◽

Emission Stars

In connection with the plans of the Pulkovo Observatory for removing one of their vertical circles to the southern hemisphere the following recommendation was proposed by Dr Morgan and seconded by Prof. Boss: “The Commission regards the proposal of the Pulkovo Observatory to establish the Vertical Circle in as nearly equal a southern latitude as possible with great sympathy. We believe this will be of very great value in the improvement of fundamental decimations.”Dr Lundmark read a report on the programmes for the Lund meridian circle, which programmes include stars of special interest, such as long- and short-period variables, extremely red non-variable stars, B-emission stars, moving clusters, nebulous stars, nuclei of planetary nebulae and of anagalactic objects, etc. The definite programme will contain at least 3000 stars, results for some 400 of which have already been obtained. It is planned to extend the observations to stars in the southern hemisphere as soon as financial conditions will permit the erection of a southern station.

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