Structural design of a lunar radio telescope using interactive CAD

Date

1992-01-01

Author

Akgül, Ferhat
Johnson, S

Metadata

Show full item record

Item Usage Stats

106
views

0
downloads

Some astronomers are considering the moon as an attractive location within the inner solar system for a variety of astronomical observatories, some of which could be operational early in the 21st century. This paper describes the computer‐aided structural design of a 122‐m diameter, fully steerable, parabolic radio telescope to be located on the moon. The loads acting on such a reflector differ substantially from those acting on a reflector that must operate in earth's environment. The moon has excellent advantages as a location for such an instrument. The absence of atmosphere completely eliminates the wind, snow, and ice loads. The gravity field is only one‐sixth that of earth's. The thermal changes from night to day are severe, but structural problems can be avoided by using a thermally stable composite material. Structural elements for the reflector dish have been analyzed and designed for static loads with a specially written interactive graphical computer program. The resulting structure has a mass nearly 40 times less than its earth's counterpart made of steel. The evaluation of the results of the design studies supports the possibility of building a large‐aperture parabolic radio telescope on the moon.

Subject Keywords

Astronomy, Computer aided design, Moon, Static loads, Paraboloid

URI

https://hdl.handle.net/11511/85612
https://ascelibrary.org/doi/pdf/10.1061/%28ASCE%290893-1321%281992%295%3A1%2812%29

Journal

Journal Of Aerospace Engineering

DOI

https://doi.org/10.1061/(ASCE)0893-1321(1992)5:1(12)

Collections

Department of Engineering Sciences, Article

Suggestions

OpenMETU
Core

Global Site Selection for Astronomy AKSAKER, NAZIM; Yerli, Sinan Kaan; Erdogan, M. A.; Kurt, Z.; Kaba, K.; Bayazit, M.; YEŞİLYAPRAK, Cahit (Oxford University Press (OUP), 2020-03-01) A global site selection for astronomy was performed with 1 km spatial resolution (similar to 1 gigapixel in size) using long-term and up-to-date datasets to classify the entire terrestrial surface of the Earth. Satellite instruments are used to get the following datasets of geographical information system (GIS) layers: cloud coverage, digital elevation model, artificial light, precipitable water vapour, aerosol optical depth, wind speed, and land use and land cover. A multi-criteria decision analysis (MCDA)...
Age determination of the open cluster NGC 2287 (M41) Küçük, İbrahim; Eryurtezer, Dilan (Springer Science and Business Media LLC, 1988) We have estimated the age of the open cluster NGC 2287 (M41) by taking into account the rotation of the member stars. TheUBV photoelectric measurement values were taken from Eggen (1974). Besides the Main-Sequence stars this cluster has seven red giants, all of them above the turn-off point. Having obtained the theoretical Hertzsprung-Russell diagram from observed colour-magnitude diagram, we have discussed two methods, given in the literature, to estimate the age of the cluster under consideration. The f...
Structural material selection and processing for low earth orbit spacecraft regarding atomic oxygen effects Avcu, S; Celik, B (2003-11-22) In this paper structural material selection and surface processing considerations problem for low earth orbit (LEO) spacecraft is discussed. In order to limit this broad subject, discussion is focused especially on "Atomic Oxygen Effect", that is crucial for structures. Atomic Oxygen (AO) constitutes the most severe impact on material degradation and erosion. However other environmental effects like, space debris, outgassing, solar and cosmic radiation cannot be ignored. Two types of materials used for sate...
A search for supernova remnants in the nearby spiral galaxy M74 (NGC 628) SONBAŞ, EDA; AKYÜZ, AYSUN; Balman, Şölen; Ozel, M. E. (EDP Sciences, 2010-07-01) An optical search was carried out for supernova remnants (SNRs) in the Sc type nearby spiral galaxy M 74, using ground-based observations at the TUBITAK National Observatory (TUG, Antalya/Turkey) and the Special Astrophysics Observatory (SAO, Russia). Observations were supplemented by the spectral analysis of archived X-ray data from XMM-Newton and Chandra. The survey of M74 covered similar to 9 arcmin(2) with [S II], H alpha, and their continuum filters. Interference filter images of M 74 were obtained the...
Project Management of DAG: Eastern Anatolia Observatory KESKİN, ONUR; YEŞİLYAPRAK, Cahit; Yerli, Sinan Kaan; Zago, Lorenzo; Guver, Tolga; Alis, Sinan (2016-06-28) The four meter DAG (Eastern Anatolia Observatory in Turkish) telescope is not only the largest telescope in Turkey but also the most promising telescope in the northern hemisphere with a large potential to offer scientific observations with its cutting edge technology. DAG is designed to be an AO telescope which will allow both infrared and visible observations with its two Nasmyth platforms dedicated to next generation focal plane instruments. In this paper, status updates from DAG telescope will be presen...

Citation Formats

F. Akgül and S. Johnson, “Structural design of a lunar radio telescope using interactive CAD,” Journal Of Aerospace Engineering, pp. 12–23, 1992, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/85612.