Sensors Flashcards
The range of all possible EM radiation
Electromagnetic spectrum
All EM waves have?
Frequency, wavelength, energy
Longest wavelength and lowest frequency of all EM energy
Radio
Good for transmitting information penetrates haze, Light rain, snow, clouds, and smoke. Ideal for data links and remote-sensing
Microwaves
Smallest wavelength of any wave
Gamma-rays
The act of receiving an RF energy return that has contacted an object
Detection
The direction relative to the location of the radar
Azimuth
The distance to the target in nautical miles
Range
The targets elevation above ground level
Altitude
The time that the radar set is transmitting the RF energy during each pulse
Pulse Duration
The period when the radar is not transmitting
Resting time
The time from the leading edge of one pulse to the leading edge of the next
Pulse Repetition Time
The number of pulse repetition times per second. Measured in Hertz
Pulse Repetition Frequency
The origin of any radar signal and operation
Power source
The heart of the radar system. It controls and times the operation of various components of a radar system
Synchronizer
A measure of how well an object can hold thermal energy
Thermal capacity
Transmit the necessary long duration, high-powered pulses needed to detect targets at a great distance away
Pulse radars
Transmits a series of passes, when echoes are received the radar compares the frequency of a transmitted pulse against that of the received echo
Pulsed Doppler radar
Provides a high-resolution “photo like” image of the area of interest, making possible the detection of stationary targets
Synthetic aperture radar
Allows a single antenna to alternately transmit and receive
Duplexer
A comparison of the meeting efficiency of a graybody with that of a perfect emitter, the blackbody
Emissivity
Is the standard against which reflectance and absorption are measured
Blackbody
The combination of temperature and emissivity of a body
Radiometric temperature
Separates the IR energy and directs it to the IR detector
Beam splitter
Received through a turret window by a mirror lens and beam splitter
IR energy/video
When any form of EM energy encounters a surface that does not absorb energy
Reflection of light
The deviation of light from its original path because of the speed change
Refraction of light
Occurs when light energy passes from one medium into another causing the energy to change velocity
Refraction
Light containing all wavelengths of visible the spectrum
White light
Designed to operate over a wide range of light levels from twilight the full sun
Daylight television
DTV
Allows the user to see in conditions much too dark for the human eye or DTV camera
Low light television
LLTV
Fused image settings are inputted by the sensor operator through?
Menu button interface and control panel letters
When SO sets the ratio, the resulting videos known as?
Blended video
Rely on your picture quality to exploit the FMV
Imagery analysts
Level and gain or equivalent to brightness and contrast when viewing an?
IR image
When should the SO focus the picture?
Throughout the mission
The targeting laser in the MTS
Laser rangefinder/designator
LRD
Used in conjunction with night vision equipment or LLTV
Laser target marker
LTM
The maximum level of laser radiation to which a human can be exposed without adverse biological effects to the eye or skin
Maximum permissible exposure
MPE
Are the major cause of tissue damage by a laser beam
Thermal effects
Non-beam hazards
Electrical, chemical, and fire
