Primary mirror segmentation for large opticaltelescopes: an inverse map projection approach

2021 ◽  
Author(s):  
Yi Zheng ◽  
Lifeng Tang ◽  
Bin Liang ◽  
ying li
Keyword(s):  
Map Projection ◽  
Primary Mirror ◽  
Projection Approach

Evaluation of alternative conformal mapping for geospatial data in Jordan

2019 ◽  
Vol 13 (4) ◽  
pp. 335-344
Author(s):  
Maan Habib ◽  
A’kif M. S. Al-Fugara
Keyword(s):  
Large Scale ◽  
Analytical Study ◽  
Stereographic Projection ◽  
Map Projection ◽  
Optimum Parameters ◽  
Flat Sheet ◽  
Change Of Scale ◽  
Projection Approach ◽  
Extended Area ◽  
Suitable System

Abstract Map projection is required to convert geodetic position of features on the earth’s surface onto a flat sheet to produce a map. Conformality is necessary for many large-scale maps to maintain angles and scale at any point in all directions. However, over extended area there is distortion due to the change of scale from one point to another. This research conducts a comparative analytical study of the recent established conformal projection, Transverse Mercator, in Hashemite Kingdom of Jordan with another proposed one. In fact, the suggested projection will be chosen to represent the area in single zone, balance errors in linear scale to minimize them especially in the capital and other major population centers, and to meet the requirements of modern surveying techniques. The main objective of this study is to apply possibility of Stereographic projection to find out the most suitable system for mapping in Jordan depending on the previous criteria and double projection approach by using ArcGIS system to define its optimum parameters.

A Photographic Map of the Moon

1962 ◽  
Vol 14 ◽  
pp. 113-115
Author(s):  
D. W. G. Arthur ◽  
E. A. Whitaker
Keyword(s):  
Lunar Surface ◽  
The Moon ◽  
Map Projection

The cartography of the lunar surface can be split into two operations which can be carried on quite independently. The first, which is also the most laborious, is the interpretation of the lunar photographs into the symbolism of the map, with the addition of fine details from telescopic sketches. An example of this kind of work is contained in Johann Krieger'sMond Atlaswhich consists of photographic enlargements in which Krieger has sharpened up the detail to accord with his telescopic impressions. Krieger did not go on either to convert the photographic picture into the line symbolism of a map, or to place this picture on any definite map projection.

GIS Technologies in Course of Mathematical Cartography

2017 ◽  
Vol 921 (3) ◽  
pp. 30-35
Author(s):  
N.G. Ivlieva ◽  
V.F. Manukhov
Keyword(s):  
Software Tools ◽  
Digital Models ◽  
Map Projection ◽  
Gis Technologies ◽  
Surface Distortion ◽  
Nodal Points ◽  
Projection Properties ◽  
Special Software

GIS are closely related to mathematical cartography, as they work with spatially coordinated data. Practical course in mathematical cartography should meet the requirements of time and include tasks involving the use of modern GIS technologies. The functionality of GIS packages allow you to easily create maps in a given map projection, draw graticules and measured grids, perform dimensions on maps. This article is devoted to the research of map projection properties on the basis of GIS technologies in a practical course of mathematical cartography. The focus is on visual way to display local and regional distortions on maps. To create lines of equal distortion should use special software tools that allow to build digital models of surface distortion distribution directly on formulas or be interpolated both discretely located nodal points and isolines.

A Manual of Map Projection

1922 ◽  
Vol 12 (3) ◽  
pp. 518
Author(s):  
C. H. Swick ◽  
C. H. Deetz ◽  
O. S. Adams
Keyword(s):  
Map Projection

Thermal control of primary mirror of Space Solar Telescope

Optik ◽  
2021 ◽  
Vol 229 ◽  
pp. 166290
Author(s):  
Shuang Yang ◽  
Changshuai Du ◽  
Xianwei Yang ◽  
Chunlong Liu ◽  
Yan Xiong ◽  
...  
Keyword(s):  
Thermal Control ◽  
Solar Telescope ◽  
Primary Mirror ◽  
Space Solar Telescope

Perspectives on primary mirror figure control for a space-based optical telescope

2000 ◽  
Author(s):  
Douglas C. Neam ◽  
Paul A. Lightsey ◽  
James H. Crocker
Keyword(s):  
Optical Telescope ◽  
Primary Mirror
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