Added computing of maximal points per segment PSD values

Author: demvlad

src/graph_spectrum.js

@@ -155,6 +155,7 @@ export function FlightLogAnalyser(flightLog, canvas, analyserCanvas) {
 
         case SPECTRUM_TYPE.POWER_SPECTRAL_DENSITY:
           fftData = GraphSpectrumCalc.dataLoadPSD(analyserZoomY);
+          analyserSegmentLengthPSD.prop("max", fftData.maximalSegmentsLength);
           break;
 
         case SPECTRUM_TYPE.FREQUENCY:

src/graph_spectrum_calc.js

@@ -125,7 +125,7 @@ GraphSpectrumCalc.dataLoadPSD = function(analyserZoomY) {
     overlapCount = 0;
   } else {
     pointsPerSegment = this._pointsPerSegmentPSD;
-    overlapCount = pointsPerSegment / 2;
+    overlapCount = pointsPerSegment * 3 / 4;
   }
 
   const psd =  this._psd(flightSamples.samples, pointsPerSegment, overlapCount);
@@ -139,6 +139,7 @@ GraphSpectrumCalc.dataLoadPSD = function(analyserZoomY) {
     minimum: psd.min,
     maximum: psd.max,
     maxNoiseFrequency: psd.maxNoiseFrequency,
+    maximalSegmentsLength: this.getNearPower2Value(flightSamples.samples.length),
   };
   return psdData;
 };