Computer Science – Sound
Scientific paper
Nov 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991esasp.317..343n&link_type=abstract
In ESA, 10th ESA Symposium on European Rocket and Balloon Programmes and Related Research p 343-347 (SEE N92-24589 15-12)
Computer Science
Sound
Atomic Spectra, Line Spectra, Lyman Alpha Radiation, Photons, Resonance, Sounding Rockets, Background Noise, Channel Multipliers, Interference Grating, Signal To Noise Ratios, Spectrum Analysis
Scientific paper
On Aug. 23, 1989 at 18.05 UT the payload Solly was carried onboard a Black Brant 9 rocket from White Sands Missile Range (U.S.) to an apogee of about 330 km. The experiment consists mainly of a hydrogen cell with channeltron mounted sideways of the main optical axis. By only measuring the scattered Lyman alpha photons, it is possible to study in detail the core region of the solar Lyman alpha line. The experiment was flown on Oct. 24 1988 for the first time. The data sets of this flight showed a very high background signal and in order to improve the signal/noise ratio in the next flight, a Lyman alpha interference filter was mounted in front of the channeltron detector. The effect of this filter is presented. Up to now the data sets were evaluated by simulating the photon flux by means of a Monte Carlo technique, which is a very time consuming computer method. An analytical approximation was evaluated, and a comparison of both methods is given.
Fahr Hans Jörg
Lay Gary
Nass H. U.
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