Geoscience Reference
In-Depth Information
Fig. 14. Distinctive Doppler signatures of ballistics and ash dynamics for a jet plume at
Arenal volcano (18/02/2004 at 18:47 U.T.).
Top
: velocigrams of 5 contiguous range bins.
Inset: 3-D velocigrams of the 2607 m range bin above the vent.
Bottom
: Doppler spectra at
2607 m, showing power spectral density (dB arbitrary units) versus radial velocity (-60 to +
60 m/s); central peaks with constant power value are non filtered ground echoes.
