Geopsy: Spectrum output file

In this type of file (name_N.spec, name_E.spec and name_Z.spec, where 'name' stands for the station name) is stored the Fourier spectra curve, the processing parameters of this curve are saved in the name_N.log, name_E.log and name_Z.log file.

File description:

• the # sign indicate useless lines for the curve definition.
  • line 1: output geopsy version.
  • line 2: number of windows (stored in the name_N.log, name_E.log and name_Z.log file).
  • line 3: main frequency (f0) found from the spectrum curve. This value is the higher valus of the computed curve.
  • line 4: number of windows used to calculate the averaged main frequency (f0) (see next line).
  • line 5: averaged main frequency (f0) issued from the f0 of each windows, divided by the standard deviation and multiplied by the standard deviation.
  • line 6: description of the data below.
  • line 7 until the end of file:
    • the first column corresponds to the frequency in Hz.
    • the second column gives the value of the spectrum curve at the frequency in the first column.
    • the third column gives the value of the spectrum curve (at the frequency in the first column) divided by the standard deviation.
    • the fourth column gives the value of the spectrum curve (at the frequency in the first column) multiplied by the standard deviation.

# GEOPSY output version 1.1
# Number of windows = 16
# f0 from average	2.4829
# Number of windows for f0 = 16
# f0 from windows	2.55187	2.36492	2.73882
# Frequency	Average	Min	Max
0.5	15.4004	10.6317	22.3078
0.50185	15.359	10.6008	22.2529
0.503706	15.312	10.5545	22.2139
0.50557	15.2593	10.4926	22.1915
0.50744	15.2006	10.4145	22.1862
0.509317	15.1357	10.3201	22.1985
0.511201	15.0643	10.2089	22.2291
0.513092	14.9861	10.0808	22.2785
0.514991	14.9007	9.93548	22.3472
0.516896	14.8076	9.77289	22.4361
0.518808	14.7064	9.5928	22.5458
0.520727	14.6034	9.46215	22.5381
0.522654	14.5066	9.43029	22.3155
0.524587	14.4063	9.38984	22.1028
0.526528	14.3024	9.34079	21.8996
0.528476	14.195	9.28312	21.7058
0.530431	14.084	9.2168	21.5214
0.532393	13.9693	9.14182	21.3461
0.534362	13.851	9.05815	21.1799
0.536339	13.729	8.96579	21.0227
0.538323	13.6032	8.86474	20.8744
0.540315	13.4735	8.75501	20.7349
0.542314	13.3398	8.63661	20.6043
0.54432	13.2021	8.50959	20.4823
0.546334	13.0602	8.37397	20.3691
0.548355	12.914	8.2298	20.2645
0.550383	12.7634	8.07712	20.1685
0.552419	12.608	7.916	20.0811
0.554463	12.4478	7.74649	20.0025
0.556514	12.2826	7.56862	19.9326
0.558573	12.112	7.38244	19.8716
0.560639	11.9781	7.25774	19.7685
0.562713	11.9349	7.28219	19.5602
0.564795	11.8887	7.30042	19.3606
0.566884	11.8396	7.31231	19.1697
0.568982	11.7875	7.31772	18.9876
0.571087	11.7326	7.31651	18.8142
0.573199	11.6748	7.30854	18.6495
0.57532	11.614	7.2937	18.4935
0.577448	11.5504	7.27185	18.3463
0.579584	11.4838	7.2429	18.2078
0.581728	11.4142	7.20672	18.0782
0.58388	11.3416	7.16324	17.9573
0.58604	11.266	7.11238	17.8454
0.588208	11.1873	7.05409	17.7423
0.590384	11.1055	6.98831	17.6482
0.592568	11.0204	6.91504	17.563
0.594761	10.932	6.83426	17.4868
0.596961	10.8403	6.74597	17.4197
0.599169	10.7451	6.6502	17.3616
0.601386	10.6464	6.57721	17.2331
0.603611	10.5458	6.51876	17.0604
0.605844	10.4435	6.45749	16.89
0.608085	10.3397	6.3933	16.722