<html><head><title>Noise thresholds</title></head>
<body>
The following thresholds can be set to sort out noisy spectra.
<br><br>
<b>noise to signal ratio:</b>
<br>
Maximal noise to signal ratio of a spectrum considered for analysis. The noise is defined as the rms difference between the low-pass filtered spectrum and the orginal spectrum. The signal amplitude is the maximal intensity of the spectrum.
<br><br>
<b>background to signal ratio:</b>
<br>
Maximal background to signal ratio of a spectrum considered for analysis. The background is defined as the intensity at the edges of spectra window. The signal amplitude is the maximal intensity of the spectrum.
<br><br>
<b>relative intensity threshold:</b>
<br>
Minimal integrated intensity in percentages of the average integrated intensity
</body></html>
