Some Morphological Characteristics of the Dinaric Karst

Abstract

the surface and maintained that as our regular drill. Partly this was governed by our ability to suppress the receiver after the transmitter pulse, but also the geometry of the beam and the height above the surface governs the internal layering that you can see within the ice mass. If you are low, the echo return from oblique angles is of short duration and you have a better chance of seeing weak layering effects in the ice than if you are, say, 1000 m above the surface. This point showed up in some of Professor Gudmandsen's slides, when he was 20 metres above the surface he had a distinct bottom echo but when he was 1000 m above the surface, the bottom almost merged into the noise.