Sest = SxSi
Figure 6 shows plots of prototype and estimated energy spectrums for LB2 for
February 14 & 15, 2001. It is interesting that the part of the spectrums below 0.05 Hz
are similar. E200-30 and Et where calculated from the Sest for each record. Figure
7 show simultaneous plots of Et and E200-30 for the prototype and estimated results.
The scatter plots at the bottom of the page contain the same information. The overall
average % error for E200-30 was 21.97% and was 45.79% for Et.
For more information, contact: James P. McKinney or William D. Corson, CEERD-
 P. D. Welch, "The Use of Fast Fourier Transform for the Estimation of Power
Spectrum: A Method Based on Time Averaging Over Short, Modified Peri-
odogams," IEEE Transactions on Audio and Electroacoustics, June 1967.