Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Frank W. Kan"'
Publikováno v:
Ground-based and Airborne Telescopes IX.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ca6ee4418d061fcd1847edeabf2bf04
https://doi.org/10.1117/12.2631662
https://doi.org/10.1117/12.2631662
Autor:
Frank W. Kan, Andrew T. Sarawit
Publikováno v:
Ground-based and Airborne Telescopes VII.
Many radio telescopes, radar antennas, and enclosures for optical telescopes use wheel-on-track systems for their azimuth rotations. Design of such systems requires properly understanding of the contact behavior between the wheel and the azimuth trac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a582bcd94da91b1c90fa975b86bcfebe
https://doi.org/10.1117/12.2314609
https://doi.org/10.1117/12.2314609
Publikováno v:
SPIE Proceedings.
On 15 October 2006, a large earthquake damaged both telescopes at W. M. Keck Observatory resulting in weeks of observing downtime. A significant portion of the downtime was attributed to recovery efforts repairing damage to telescope bearing journals
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5585d243c0e1705c693b75ffac020493
https://doi.org/10.1117/12.2233945
https://doi.org/10.1117/12.2233945
Publikováno v:
SPIE Proceedings.
Repairs to the W.M. Keck Observatory primary mirror segments are needed to stop the cracking at the bonded supports. The repairs include changes to the design of the axial and radial inserts and the way these are bonded to the mirror backsurface. In
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::26b7a3e161853f0c3d1fdf46be27d23a
https://doi.org/10.1117/12.2233937
https://doi.org/10.1117/12.2233937
Autor:
Frank W. Kan, Andrew T. Sarawit
Publikováno v:
SPIE Proceedings.
This paper describes the development of the CCAT telescope finite element model (FEM) and the analyses performed to support the preliminary design work. CCAT will be a 25 m diameter telescope operating in the 0.2 to 2 mm wavelength range. It will be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6cc799362c4ec3a30f75b487811ba1d
https://doi.org/10.1117/12.2057348
https://doi.org/10.1117/12.2057348
On 15 October 2006 a large earthquake damaged both telescopes at Keck observatory resulting in weeks of observing downtime. A significant portion of the downtime was attributed to recovery efforts repairing damage to telescope bearing journals, radia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9e27a9c25b247268c501be6e7992dcc6
https://resolver.caltech.edu/CaltechAUTHORS:20150612-143159052
https://resolver.caltech.edu/CaltechAUTHORS:20150612-143159052
Autor:
Hairen Wang, Jingquan Cheng, Yingxi Zuo, Ji Yang, Frank W. Kan, Zheng Lou, Andrew T. Sarawit, Yuan Qian
Publikováno v:
Research in Astronomy and Astrophysics. 16:006
DATE5, a 5 m telescope for terahertz exploration, was proposed for acquiring observations at Dome A, Antarctica. In order to observe the terahertz spectrum, it is necessary to maintain high surface accuracy in the the antenna when it is exposed to An
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4a5976852edce4e4cc69173f6c48320
https://doi.org/10.1088/1674-4527/16/8/123
https://doi.org/10.1088/1674-4527/16/8/123
Publikováno v:
Journal of Performance of Constructed Facilities. 9:4-23
In November of 1990, approximately 850 m (2,800 ft) of the 2020 m (6,620 ft) long Lacey V. Murrow Bridge (LVMB), a 50-year-old floating concrete bridge over Lake Washington near Seattle, sank after a major storm. The bridge had been closed for renova
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9565a673364d1380b607c40d696fee4
https://doi.org/10.1061/(asce)0887-3828(1995)9:1(4)
https://doi.org/10.1061/(asce)0887-3828(1995)9:1(4)
Publikováno v:
IEEE Antennas and Propagation Magazine. 36:19-28
A deformable subreflector was designed and implemented to compensate for part of the gravity deformations of the primary reflector of Haystack, a 37-m-(120-ft-)diameter Cassegrain radio telescope. This was done to allow it to operate at 100+ GHz, as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94ea53a536e0066b6d15439e9d8b0ded
https://doi.org/10.1109/74.294240
https://doi.org/10.1109/74.294240
Autor:
Michael P. Brenner, Daniel P. Valentine, Andrew T. Sarawit, Keith B. Doyle, Frank W. Kan, Joseph Antebi
Publikováno v:
SPIE Proceedings.
The Haystack radio telescope is being upgraded to support imaging radar applications at 96 GHz. The Cassegrain antenna includes a 37 m diameter primary reflector comprising 432 reflector panels and a 2.84 m diameter hexapod mounted subreflector. Top-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd4d30eb670ebe70116c331ee99ac2f8
https://doi.org/10.1117/12.890123
https://doi.org/10.1117/12.890123