The scientific goals of CASSE
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Passive mode
Detection and localization of seismic activities
Active mode
Determination of acoustic P-wave velocity
Determination of acoustic S-wave velocity
The results of both measurements allow
- calculation of elastic constants (Young's Modulus and Poisson Ratio)
of the surface material through
(with Rho: Density; Cp, Cs: P, S-wave velocity)
- operation of CASSE as a phased array for detection
of structures in the underground (boulders, cavities)
- determination of the thickness of the surface layer (regolith)
Estimation of grain size by measuring the transmitter impedance
and the frequency dependend attenuation
Optional functions
Usage of the accelerometers for navigation support
and function control
Dust impact detection during descent phase
Touchdown detection system
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