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Effect of the TLEs-receiver distance on the signal perturbations properties - PowerPoint PPT Presentation


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Effect of the TLEs-receiver distance on the signal perturbations properties. S.NAITAMOR, O.BOUMIA, T.ABDELATIF. Past analysis using two receivers in different locations showed that the TLE-Receiver distance plays an important role in determining the VLF signals perturbations properties.

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slide1

Effect of the TLEs-receiver distance on the signal perturbations properties

S.NAITAMOR, O.BOUMIA, T.ABDELATIF

slide2

Past analysis using two receivers in different locations showed that the TLE-Receiver distance plays an important role in determining the VLF signals perturbations properties

slide3

In this present work we will use one receiver data observation of different events locations

Event 1 : -4.63 °E 48.57 °N

Event 2 : 0.99 °E 40.87 °N

Event 3 : 4.37 °E 40.01 °N

Event 4 : 5.59 °E 43.83 °N

slide4

Event 1 & 2 comparison

Event 1 : -4.63 °E 48.57 °N

Amp = 1 dB

Perturbation duration ~ 240 s

Event 2 : 0.99 °E 40.87 °N

Amp ~ 0.8 dB

Perturbation duration > 280 s

slide5

Event 3 & 4 comparison

Event 3 : 4.37 °E 40.01 °N

Amp = 1 dB

Perturbation duration > 180s

Event 4 : 5.59 °E 43.83 °N

Amp = 3 dB

Perturbation duration ~ 120s

slide8

In time interval of 120 ms, two TLEs were captured : A GJ after the –CG and a Sprite after the +CG.

From the plot the Early signal perturbation reached its maximum in 40 ms after the –CG and 60 ms before the +CG.

After the +CG the perturbation continued in both signals

slide9

Two receivers data comparison

The distant receiver did not recorded a significant perturbation associated to the GJ

The signal perturbation recovered rapidly in the distant receiver data than the near receiver one

slide10

Conclusion

The data comparison proved that the distance to the receiver plays an important role in determining the signals perturbations amplitudes and the recovery time

The statistical study showed that the distant disturbances have their associated perturbations

with small amplitudes and short recovery time

The comparison between the two receivers data (at Tunis and Sebha) in association with the GJ observation gives a clear evidence that some signal perturbation maybe missed by the distant receiver