How do Military soliders scan a area with targets using there eyes ? What pattern or technique do they use?
951794
I learned that at night it is best to use the "figure eight" method. You move your head, with or without NVGs, in the motion of an eight.
561908
With their eyes.\n\nGoodluck!
488916
No different than the use of traditional cameras.\n\nGenerally, nobody really cares unless you are working in an area that may contain classified materials.\n\nIn fact the Army is issuing digital cameras to squads in Iraq.  This way a soldier in the field can take a picture of something and transmit that picture electronically to the people who either need the information (or can tell him what he is looking at).
955387
they use laser to cute it  to be more accurate
278667
I got this!!\n\nDon't even look at them, I don't mean purposely look 15ft in the other direction everytime they are around.\nI mean look at their shoulder area if you have to look that way, you can adjust your eyes on what you are really looking at this way with never having to worry about making eye contact.\nI have very good vision and scope people out while they are far away and then I can walk right past everyone and yet see nobody.\n:o)
455230
There is not software.  There is hardware in development that utilizes a form of radar that allows airport screeners to "see" under a person's clothing.\n\nThe system is so detailed that they currently have not yet deployed the system due to the ability to see "everything" and there is a fear of reprisial from the public with screeners viewing the "privates".
135343
What I remember is another buddy or soldier is covering one area while you are covering another area. Since we don't have eyes in the back of our heads, this is the best way to cover the whole 360 degrees. It usually goes with combat whether in a war or Police swat teams.
1183452
Reconnaissance is a preliminary survey to gain information;  especially   : an exploratory military survey of enemy territory.
1086466
are you talking about a periscope? It's not just for submarines anymore. You can use em to look over walls, around corners, etc. \nOr are you talkin about the gizmo guards use to look under the frames of cars, etc.? used to look for explosives, refugees, etc.
334373
See the back of a can of Raid. Point, spray, destroy.
271452
I think you mean the Doppler Radar,\n\nthe frequecy of the reflected wave changes when the wave is incident on a moving object. this is called doppler effect. you can measure the change the speed of the object by measuring the change in frequency of the wave.\n\nThis principle is used in detecting the speed of vehicles (ultrasound) and stars systems (visible light).\n\na good explanation of the working principle can be found on wikipedia:\n\nDoppler radar uses the Doppler effect to measure the relative velocity information from a radar system. The Doppler effect shifts the frequency of the radar reflection based on the relative velocity (speed) of the "target", allowing for the direct and highly accurate measurement of speed. Doppler radars were originally developed for military radar systems, but have since become a part of almost all radar systems, including weather radar and radar guns for traffic police and sports.
500948
put a piece of tape on teh center of the screen and then mark a dot on the tape.  When your targets are covered by the dot, that's when you fire.  You can also use a dry erase marker .. but make sure it's not a permanent marker.  Also, you can use a glass cutter or sharp instrument to etch the target area (and lead lines) permanently on your screen as the pros do.
1071814
So they can scope out their next victim.
618873
This is a fascinating subject that is rarely discussed.  I have read supposedly legitimate reports that both the United States and the Soviet Union have employed people with so-called "remote sensing" capabilities to locate distant people and places.\n\nFor example, the government is looking for a new chemical factory.  One program I saw showed a dramatization in which the "remote seers" were put in a room, and hour by hour they would come closer and closer to pinpointing the exact location of what was being sought.\n\nDouble blind tests were done, and if the reports are true, remote sensing is a legitimate psychic phenomena.  When the remote seers located the desired person or object, the amount of detail provided by them was amazing.  These psychics claim the ability to actually see in their mind's eye the object of the search.  They produced drawings, sometimes showing very concrete details that could not be racked up to coincidence.
723267
There are many different kinds of satellites that are used to help protect the security of the United States and our forces around the world.\n\nThe kind most people think of take pictures, providing imagery intelligence (IMINT).  These are used to do things like discover where a potential enemy may be building rockets that could be targeted at the US.  We can also use radar to take pictures of a sort - not as clear as visual pictures, but much more valuable over a cloudy area!\n\nEven though "a picture is worth 1000 words," it is still very very valuable for us to hear those 1000 words, so another kind of satellite can monitor some kinds of radio transmissions.  Imagine how valuable it might be to our forces if we've heard an enemy commander say "We attack the town at dawn."  This kind of intelligence is called COMINT.\n\nOther satellites monitor other kinds of electronic signals - SIGINT. And some view and report on other things, like the heat of a rocket launch, to provide measurement and signatures intelligence - MASINT.\n\nNone of these is known officially as a "spy satellite," so, technically, there is no official answer to your question.  But they all are used to get information on potentially dangerous countries and organizations that want to harm our country.  Since those bad actors probably would not like us to see what they're doing, it could all be called 'spying.'\n\nMaybe it's easier to define what's NOT a "spy satellite."  Satellites that are used for purposes that are not secret and support non-defense purposes include navigation, weather, and communications.  I don't think anyone would categorize any of  them as spy satellites.\n\nBoth our civilian intelligence agencies and the military employ quite a few people to perform the very important tasks of building, flying, collecting, and analyzing all the intelligence from these sources.  If you're patriotic and technically minded, it's a great career!
640044
Sometimes by radar, sometimes by infared (heat)...at least these are the two most common.\n\nThe missle usually locks on to the greatest contact signature, heat or radar, but can be overridden by the pilot or the weapons officer in a multi-contact situation.
948741
How light guns work\n\nThe "light gun" is so named because it uses light as its method of detecting where on screen you are targeting. The name leads one to believe that the gun itself emits a beam of light, but in fact most light guns actually receive light through a photoreceptor diode in the gun barrel. [Re].\n\nThere are two versions of this technique that are commonly used, but the concept is the same: when the trigger of the gun is pulled, the screen is blanked out to black, and the diode begins reception. All or part of the screen is painted white in a way that allows the computer to judge where the gun is pointing, based on when the diode detects light. The user of the light gun notices little or nothing, because the period in which the screen is blank is usually only a fraction of a second.\n\nSequential targets\n\nThe first detection method, used by the Zapper, involves drawing each target sequentially in white light after the screen blacks out. The computer knows that if the diode detects light as it is drawing a square (or after the screen refreshes), that is the target the gun is pointed at. Essentially, the diode tells the computer whether or not you hit something, and for n objects, the sequence of the drawing of the targets tell the computer which target you hit after 1 + ceil(log2(n)) refreshes (one refresh to determine if any target at all was hit and ceil(log2(n)) to do a binary search for the object that was hit).\n\nAn interesting side effect of this is that on poorly designed games, often a player can point the gun at a light bulb, pull the trigger and hit the first target every time. Better games account for this by detecting if all targets appear to match - that would mean cheating.\n\nCathode ray timing\n\nThe second method, used by the Super Nintendo Entertainment System's Super Scope and computer light pens is more elaborate but more accurate.\n\nThe trick to this method lies in the nature of the cathode ray tube inside the video monitor. (CRTs were the only affordable TV monitors in the late 1980s and early 1990s, when this method was popularized.) The screen is drawn by a scanning electron beam that travels across the screen starting at the top until it hits the end, and then moves down to update the next line. This is done repeatedly until the entire screen is drawn, and appears instantaneous to the human eye as it is done very quickly.\n\nWhen the player pulls the trigger, the computer (often assisted by the display circuitry) times how long it takes the electron beam to excite the phosphor at the location the gun is pointed at. It then calculates the targeted position based on the monitor's horizontal refresh rate (the fixed amount of time it takes the beam to get from the left to right side of the screen). Either the computer provides a time base for the horizontal refresh rate through the controller's connector (as in the Super Scope), or the gun reads the composite video signal through a T-connector on the A/V cable (as in the GunCon 2). Once the computer knows where the gun is pointed, it can tell through collision detection if it coincides with the target or not.\n\nMany guns of this type (including the Super Scope) ignore red light, as red phosphors have a much slower rate of decay than green or blue phosphors. So some (but not all) games brighten the entire screen for a frame in order to get a more reliable fix on the position.\n\nDisplay timing is useless with plasma, LCD, and DLP, which refresh all pixels at the same time.\n\nCombining the methods\n\nSome light guns designed for sequential targeting are not timed precisely enough to get an (X, Y) reading against the video signal, but they can use a combination of the two methods. First the screen is brightened and the response time is measured as in cathode ray timing, but the computer measures only which scanline was hit and not which horizontal pixel was hit. This does not need nearly as fast a timer that pure ca