Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Gregory H. Ames"'
Autor:
Gregory H. Ames, Jason M. Maguire
Publikováno v:
The Journal of the Acoustical Society of America. 121:1392-1395
Fiber optic hydrophones typically use a long sensor fiber wrapped around an air-filled mandrel to achieve high responsivity. Minimum mandrel diameter is determined by fiber reliability considerations. A miniature hydrophone, with diameter of about a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3757811387f627d37f1c215e501857d6
https://doi.org/10.1121/1.2431340
https://doi.org/10.1121/1.2431340
Autor:
Walter R. Donat, Gregory H. Ames
Publikováno v:
SPIE Proceedings.
Distributed, interferometric, fiber optic sensors based on Rayleigh scattering suffer from random signal level variation (Rayleigh fading). This speckle-like phenomenon is due to the large number of scatterers. Knowledge of the statistical distributi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2f6e3ea2e2096dd021494cb3ee70d48a
https://doi.org/10.1117/12.2059322
https://doi.org/10.1117/12.2059322
Autor:
Gregory H. Ames, John M. Rakoczy, John A. Booth, Edward E. Montgomery, James R. Fowler, Mark T. Adams, Marsha J. Wolf, Povilas Palunas
Publikováno v:
SPIE Proceedings.
A sensing and control system for maintaining the optical alignment of the ninety-one 1-meter diameter hexagonal segments forming the Hobby-Eberly Telescope (HET) primary mirror array has been developed by NASA - Marshall Space Flight Center (Huntsvil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7608f284cff6de319d729cce523d4b0e
https://doi.org/10.1117/12.458006
https://doi.org/10.1117/12.458006
Autor:
Gregory H. Ames, John A. Booth, William Ly, John T. Weir, Edward E. Montgomery, James R. Fowler, John M. Rakoczy, Mark T. Adams, Richard T. Howard, Drew Hall
Publikováno v:
SPIE Proceedings.
The Segment Alignment Maintenance System (SAMs) was installed on McDonald Observatory's Hobby-Eberly Telescope (HET) in August 2001. The SAMs became fully operational in October 2001. The SAMs uses a system of 480 inductive edge sensors to correct mi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1295962ba0e492e441ea8cb24d63bd44
https://doi.org/10.1117/12.456734
https://doi.org/10.1117/12.456734
Autor:
Phil Zercher, Gregory H. Ames, John T. Weir, Tim Danielson, Richard T. Howard, Edward E. Montgomery, Drew Hall, John M. Rakoczy
Publikováno v:
Adaptive Optics Systems and Technology II.
NASA's Marshall Space Flight Center, in collaboration with Blue Line Engineering of Colorado Springs, Colorado, is developing a Segment Alignment Maintenance System (SAMS) for McDonald Observatory's Hobby-Eberly Telescope (HET). The SAMS shall sense
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d31485df62072ae9130d1881afa4921
https://doi.org/10.1117/12.454780
https://doi.org/10.1117/12.454780
Autor:
James R. Fowler, John M. Rakoczy, John A. Booth, Mark T. Adams, Gregory H. Ames, Edward E. Montgomery
Publikováno v:
SPIE Proceedings.
A sensing and control system for maintaining optical alignment of ninety-one 1-meter mirror segments forming the Hobby-Eberly Telescope (HET) primary mirror array is now under development. The Segment Alignment Maintenance System (SAMS) is designed t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::170b4f0f55dc5f09ec10ccb37022881d
https://doi.org/10.1117/12.391509
https://doi.org/10.1117/12.391509
A new method of packaging fiber Bragg gratings to stabilize their wavelength over temperature variations has been demonstrated. This method uses a ceramic with a negative coefficient of thermal expansion to offset the fiber thermo-optic effect. A uni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0cf2b22e5642eea648b6638b74c7ef6e
https://doi.org/10.21236/ada367168
https://doi.org/10.21236/ada367168
Autor:
Orville T. Guffin, Gregory H. Ames
Publikováno v:
AIAA Defense and Civil Space Programs Conference and Exhibit.
As a follow-on to the spectacular success of the Hubble Space Telescope (HST), NASA is currently conducting pre-phase A studies of an even larger aperture telescope, called NGST (Next Generation Space Telescope), that will continue the phenomenal flo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::817734fcdee288800fb31c8f8b91e51a
https://doi.org/10.2514/6.1998-5284
https://doi.org/10.2514/6.1998-5284
Autor:
Henry B. Waites, Edward E. Montgomery, Glenn W. Zeiders, Richard T. Howard, John M. Rakoczy, Alan F. Patterson, Gregory H. Ames, Jeffrey L. Lindner
Publikováno v:
SPIE Proceedings.
The Phased Array Mirror, Extendible Large Aperture (PAMELA) prototype telescope phase I testing and verification has been completed. The prototype telescope is the first to have a fully adaptive primary mirror which consists of 36 hexagonal injection
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0dc68e3b3e9803f94d182273ea69569e
https://doi.org/10.1117/12.208202
https://doi.org/10.1117/12.208202
Publikováno v:
Adaptive Optics in Astronomy.
The Phased Array Mirror, Extendible Large Aperture telescope has been fully assembled and testing has started. The telescope is the first to have a fully adaptive primary mirror, which consists of 36 hexagonal injection-molded Pyrex segments that are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b74a7fc004abffa27dab770b0d50dae
https://doi.org/10.1117/12.176125
https://doi.org/10.1117/12.176125