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New Ultraviolet Solar Flux Measurements at 2000 Å Using a Balloon Borne Instrument

Published online by Cambridge University Press:  14 August 2015

M. Ackerman ,
D. Frimout  and
R. Pastiels
M. Ackerman
Affiliation:
Institut d'Aéronomie Spatiale de Belgique, 1180 Bruxelles, Belgium
D. Frimout
Affiliation:
Institut d'Aéronomie Spatiale de Belgique, 1180 Bruxelles, Belgium
R. Pastiels
Affiliation:
Institut d'Aéronomie Spatiale de Belgique, 1180 Bruxelles, Belgium

Extract

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A grating monochromator has been flown from Aire sur l'Adour (Landes) on May 10, 1968, April 19, 1969 and October 3, 1969. The instrumentation and the experimental procedure have been described previously (Ackerman et al., 1968) as well as the results of the first flight. For the two subsequent flights the wavelength marking was improved by increasing the number of the telemetered wavelength marking pulses. For the last flight the FM-FM analog telemetry system was replaced by a PCM telemetry system in such a way that the data analysis was completely made by means of a computer. Float altitudes were respectively 34, 38 and 37 km. From 1850 Å to 3000 Å up to 90 spectra per flight of the solar radiation penetrating into the atmosphere were telemetered to the ground. The solar zenith distance was ranging from 30° to 60°. The equivalent slit width was equal to 19 Å in the case of the first experiment and was equal to 14.6 Å for the two subsequent flights.

Type
Part III: UV Astronomy
Information
Symposium - International Astronomical Union , Volume 41: New Technique in Space Astronomy , 1971 , pp. 251 - 253
Copyright
Copyright © Reidel 1971 

References

Ackerman, M., Frimout, D., and Pastiels, R.: 1968, Ciel Terre 84, 408.Google Scholar
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