The sequence of images presented above has demonstrated the three dimensions associated with remote sensing imagery: the spatial, spectral, and temporal. Figure 1.25 illustrates these three dimensions, which are in general somewhat mutually exclusive. You can have high spatial resolution, but only at low temporal coverage (like Landsat: decent pictures, but only once every 16 […]
We have discussed various remote sensing modalities and some characteristics of modern systems; at this point, it is necessary to review some basic physics. The chief thing to understand is the electromagnetic (EM) spectrum and EM radiation, of which light, radar, and radio waves are examples. We’ll look at the physical equations that underlie EM […]