Earth and Planetary Science

It is now more than seven decades since the first digital computer was used in geophysical time series analysis and in weather forecast modelling. Over this period there have been considerable developments in computer technology and also in understanding geophysical processes. Processing geophysical signal is an integral part of numerical modelling of geophysical processes. But the geophysical signal, truly speaking, comprises a wide range of physical domains, such as temporal, spatial, spatio-temporal etc. Similarly, there are ranges of classes of signal attributes applicable to geophysical signals. Therefore, the scope of geophysical signal processing remains hugely extensive, which enforces to remain focus a relatively narrower or restrictive domains of geophysical signals. We attempt to define such restrictive domains of signal processing, although not fool-proof, by categorising into following sections.

 

1) Theory of sampling, reconstruction and compressed sensing,

2) Non-coherent and coherent noises and their removal,

3) Signal or anomaly enhancement techniques.