telescopes in the wind
DESCRIPTION
Telescopes in the Wind. An Experiment at W.M. Keck Observatory on the Summit of Mauna Kea, Hawaii. I. Isaac Crosson. UH Hilo Physics and Astronomy Department. Effects of the Wind on a Mountain-Top Observatory. Effects of the Wind on a Mountain-Top Observatory. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/1.jpg)
Telescopes in the Wind
I
An Experiment at W.M. Keck Observatory on the Summit of Mauna Kea, Hawaii
Isaac Crosson
UH Hilo Physicsand Astronomy
Department
![Page 2: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/2.jpg)
Effects of the Wind on a Mountain-Top Observatory
![Page 3: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/3.jpg)
Effects of the Wind on a Mountain-Top Observatory
Turbulence inside the dome deforms the
primary mirror and causes poor seeing conditions
![Page 4: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/4.jpg)
Year
Evolution of Primary Mirror Diameter
MirrorSize
(Meters)
![Page 5: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/5.jpg)
Year
Evolution of Primary Mirror Diameter
MirrorSize
(Meters)
0.9-Meter Lick Telescope
1887
![Page 6: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/6.jpg)
Year
Evolution of Primary Mirror Diameter
MirrorSize
(Meters)
0.9-Meter Lick Telescope
188710-Meter
Keck Telescope1992
![Page 7: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/7.jpg)
Year
Evolution of Primary Mirror Diameter
MirrorSize
(Meters)
0.9-Meter Lick Telescope
188710-Meter
Keck Telescope1992
Next-Generation Extremely Large Telescope
projects (ELTs)
![Page 8: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/8.jpg)
Lick Observatory on Mount Hamilton was the first
Permanent Mountain-Top Observatory
![Page 9: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/9.jpg)
Gemini North Telescope, Mauna Kea Hawaii
![Page 10: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/10.jpg)
Gemini North Telescope, Mauna Kea Hawaii
Precision Instruments and Controls
![Page 11: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/11.jpg)
Gemini North Telescope, Mauna Kea Hawaii
Ventilation Gates
![Page 12: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/12.jpg)
Extremely Large Telescope Projects
![Page 13: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/13.jpg)
Extremely Large Telescope Projects
Primary Mirror Diameter 20-100 meters
![Page 14: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/14.jpg)
Thirty Meter Telescope (TMT)
Location to be determined
Projected to be complete by 2020
![Page 15: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/15.jpg)
Predicting the Wind Effect
Computer Simulation (CFD)
Secondary Mirror
![Page 16: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/16.jpg)
Predicting the Wind Effect
Computer Simulations (CFD)
Wind Tunnel Experiments
![Page 17: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/17.jpg)
Predicting the Wind Effect
Computer Simulations
(CFD)
Wind Tunnel Experiments
![Page 18: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/18.jpg)
Predicting the Wind Effect
Computer Simulations
(CFD)
Wind Tunnel Experiments
Current Generation
Large Telescopes
Golden Opportunity at the Commissioning of Gemini South
![Page 19: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/19.jpg)
Predicting the Wind Effect
Computer Simulations
(CFD)
Wind Tunnel Experiments
Current Generation
Large Telescopes
Current Experiments at Keck II and Gemini North
![Page 20: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/20.jpg)
Details of the Keck II Experiment
![Page 21: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/21.jpg)
Details of the Keck II Experiment
Mauna Kea Weather Center Archives
![Page 22: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/22.jpg)
Details of the Keck II Experiment
Mauna Kea Weather Center Archives
Drive Control System(DCS) Log Files
![Page 23: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/23.jpg)
![Page 24: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/24.jpg)
![Page 25: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/25.jpg)
Data Records from the TMT Configuration
![Page 26: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/26.jpg)
A Directory Containing Files from a single night
of Keck II Operations
![Page 27: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/27.jpg)
Nightly Files Contain Column Data Headed by Engineering Codewords
![Page 28: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/28.jpg)
Decided to use an Event-Based Log File
![Page 29: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/29.jpg)
My Script synchronizes Keck data with TMT data
![Page 30: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/30.jpg)
Wind disturbance is a primary concern for next-generation extremely large telescope projects.
![Page 31: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/31.jpg)
Experiments at existing large telescopes are best, but these are costly and difficult.
![Page 32: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/32.jpg)
Wind data collected at Keck is most useful when it is cross-referenced with telescope activity logs, and external weather data.
![Page 33: Telescopes in the Wind](https://reader035.vdocuments.mx/reader035/viewer/2022062305/56815123550346895dbf400f/html5/thumbnails/33.jpg)
Thanks and Acknowledgements
Thank you to my mentor Chris Neyman, lead observing assistant Barbara Schaefer, software guru Shui Kwok, and everyone else who helped me at
Keck Observatory!
Thank you to Sarah Anderson, David Le Mignant, Scott Seagroves, Hilary O'bryan, my fellow interns, and everyone on the CFAO Big Island Akamai team!
Thank you to George Angeli and the other wind team engineers at the TMT Project!
The Akamai Observatory Internship program is funded by the Center For Adaptive Optics, a National Science Foundation
Science and Technology Center (STC), AST-9876783