Search results
Results From The WOW.Com Content Network
When a racon receives a radar pulse, it responds with a signal on the same frequency which puts an image on the radar display. This takes the form of a short line of dots and dashes forming a Morse character radiating away from the location of the beacon on the normal plan position indicator radar display. The length of the line usually corresponds to the equivalent of a few nautical miles on ...
Track-while-scan ( TWS) is a mode of radar operation in which the radar allocates part of its power to tracking a target or targets (up to forty with modern radar) while part of its power is allocated to scanning.
In its simplest form, a "Mode" or interrogation type is generally determined by pulse spacing between two or more interrogation pulses. Various modes exist from Mode 1 to 5 for military use, to Mode A, B, C and D, and Mode S for civilian use.
List of emoticons. Without proper rendering support, you may see question marks, boxes, or other symbols. This is a list of emoticons or textual portrayals of a writer's moods or facial expressions in the form of icons. Originally, these icons consisted of ASCII art, and later, Shift JIS art and Unicode art.
Rayon, also called viscose [1] and commercialised in some countries as sabra silk or cactus silk, [2] is a semi-synthetic fiber, [3] made from natural sources of regenerated cellulose, such as wood and related agricultural products. [4] It has the same molecular structure as cellulose. Many types and grades of viscose fibers and films exist. Some imitate the feel and texture of natural fibers ...
The following is a list of notable month-long observances, recurrent months that are used by various governments, groups and organizations to raise awareness of an issue, commemorate a group or event, or celebrate something.
It consists of being able to perceive and visually understand outside spatial information such as features, properties, measurement, shapes, position and motion. [7] For example, when one is navigating through a dense forest they are using spatial perception and awareness.
Situational awareness or situation awareness ( SA) is the understanding of an environment, its elements, and how it changes with respect to time or other factors.
The DEFCON system was developed by the Joint Chiefs of Staff (JCS) and unified and specified combatant commands. [3] It prescribes five graduated levels of readiness (or states of alert) for the U.S. military. It increases in severity from DEFCON 5 (least severe) to DEFCON 1 (most severe) to match varying military situations, with DEFCON 1 signaling the impending outbreak of nuclear warfare ...
Iron Dome ( Hebrew: כִּפַּת בַּרְזֶל, romanized : Kippat Barzel) is an Israeli mobile all-weather air defense system, [8] developed by Rafael Advanced Defense Systems and Israel Aerospace Industries. [7] The system is designed to intercept and destroy short-range rockets and artillery shells fired from distances of 4 to 70 kilometres (2–43 mi) away and whose trajectory would ...