| Autor: |
Narayanan, R., Desai, J. N., Modi, N. K., Raghavarao, R., Sridharan, R. |
| Zdroj: |
Applied Optics; June 1989, Vol. 28 Issue: 11 p2138-2142, 5p |
| Abstrakt: |
A unique photometer capable of measuring line intensities of <0.1% of the bright background continuum (5 × 10^6/Å) has been developed and successfully commissioned for the measurement of daytime OI 630.0-nm emission from the thermosphere. The photometer employs a low resolution (10^4) Fabry-Perot etalon, temperature tuned narrowband (3-Å) interference filter, radial chopper, and up/down counting system. The optimum choice of the photometer parameters and a unique method of eliminating the background enabled us to overcome the limitations of the earlier attempts to make measurements on such phenomena as dayglow and has opened up a wide range of uses. However, at present, it is being discussed only in the context of dayglow measurements. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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