Physics – Geophysics
Scientific paper
Feb 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980pepi...21..218n&link_type=abstract
(International Union of Geodesy and Geophysics, Symposium on Mathematical Geophysics, 12th, Caracas, Venezuela, Aug. 12-24, 1978
Physics
Geophysics
8
Apollo Project, Data Processing, Digital Data, Lunar Seismographs, Magnetic Tapes, Moonquakes, Pdp 15 Computer, Signal Processing, Moon, Apollo Missions, Seismic Data, Lunar Seismic Profiling Experiment, Seismic Events, Procedure, Data Reduction, Alsep, Data, Techniques, Apollo Passive Seismic Experiment, Seismograms, Classification
Scientific paper
The Apollo lunar seismic station network gathered data continuously at a rate of 3 x 10 to the 8th bits per day for nearly eight years until termination in September, 1977. The data were processed and analyzed using a PDP-15 minicomputer. On average, 1500 long-period seismic events were detected yearly. Automatic event detection and identification schemes proved unsuccessful because of occasional high noise levels and, above all, the risk of overlooking unusual natural events. The processing procedures which were finally chosen consist of plotting all the data on a compressed time scale, visually picking events from the plots, transferring event data to separate sets of tapes and performing detailed analyses using the latter. Many problems remain, especially in the automatic processing of extraterrestrial seismic signals.
Dorman H. J.
Latham Gary V.
Nakamura Yoshifumi
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