Viking halberd found in Frankish graves from the Merovingian period, which predates the Viking age; but their use by the Scandinavians is not attested and, if existent, seemed to have been rare. Viking halberd The term "halberd" has been used to translate several Old Norse words relating to polearms in the context of Viking Age arms and armour, and in scientific literature about the Viking age. In referring to the Viking Age weapon, the term "halberd" is not to be taken as referring to the classical Swiss halberd of the 15th century, but rather in its literal sense of "axe-on-a-pole", describing a
Radar configurations and types Radar configurations and types Radar configurations and types is an article about listing the different uses of radars. Radar come in a variety of configuration in the emitter, the receiver, the antenna, wavelength, scan strategies, etc. Search radars scan great volumes of space with pulses of short radio waves. They typically scan the volume two to four times a minute. The waves are usually less than a meter long. Ships and planes are metal, and reflect radio waves. The radar measures the distance to the reflector by measuring the time of the roundtrip from emission of a pulse to reception,