| Autor: |
D.A. Glenar, H.U. Käufl, D. Deming, T. Kostiuk, M.J. Mumma |
| Rok vydání: |
1988 |
| Zdroj: |
Symposium - International Astronomical Union. 123:481-484 |
| ISSN: |
0074-1809 |
| DOI: |
10.1017/s0074180900158577 |
| Popis: |
Heterodyne spectroscopy at infrared (IR) wavelengths is a technique well suited for measuring small velocities in the solar atmosphere. An IR heterodyne spectrometer for solar oscillation measurements has been located at the McMath Solar Telescope of the Kitt Peak National Solar Observatory. It is now being used for single point Doppler shift measurements of 11 micron OH absorption features formed in the upper photosphere, with sampling rates as high as 33 mHz. The instrument employs a stabilized CO2. laser permitting absolute velocity measurements with an uncertainty of < 10 ms−1. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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