IRIS data merging. I - A solution to minimize the low and intermediate frequency noise

Details IRIS data merging. I - A solution to minimize the low and intermediate frequency noise IRIS data merging. I - A solution to minimize the low and intermediate frequency noise

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...263..443f&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 263, no. 1-2, p. 443-452.

Astronomy and Astrophysics

Astrophysics

12

Data Acquisition, Helioseismology, Iris Satellites, Noise Spectra, Power Spectra, Signal To Noise Ratios, Time Series Analysis

Scientific paper

Time series of artificial low frequency noise have been produced to simulate the instrumental and atmospheric noise in the full solar disk measurements. They have been used to test various possible methods of merging data obtained simultaneously at different sites with different instruments operated under different sky conditions, with the goal of minimizing the nonsolar noise level in the 0.02-1 mHz frequency range. A merging method is proposed which implies a continuous window function deconvolution and then a loss of information on the velocity signal itself, but which proves to be far superior with respect to noise level.

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