Ground penetration radar

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Imagery acquired in active or passive mode - daytime or night-time. Incident energy from the sun will vary with season or latitude affecting the angle of the sun , with the length of time the sun has been shining and with the angle of the object on the ground. When analyzing remotely sensed data it is important to consider dates, time of acquisition and relief. The atmosphere may scatter light in the visible band and absorb it in the ultraviolet and infrared bands. Scattering is caused by particles in the atmosphere reflecting the energy, and the intensity of the scattered EMR depends on the ratio of the wavelength to the size of the particles.
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Ground-penetrating radar

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Ground-penetrating radar - Wikipedia

In , British researcher Gerald Touch, while working with Robert Watson-Watt on radar, suggested that lengths of wire suspended from balloons or parachutes might overwhelm a radar system with false echoes [2] and R. Jones had suggested that pieces of metal foil falling through the air might do the same. The head of the TRE, A. Rowe , code-named the device "Window". The German code name came from the estate where the first German tests with chaff took place, circa
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The computer measures the time taken for a pulse to travel to and from the target which indicates its depth and location. The reflected signals are interpreted by the system and displayed on the unit's LCD panel. GPR Data Collection below ground In order to find the location and depth of an object, buried subsurface, various types of GPR equipment are used to collect the data.
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Post Office began using techniques developed by the Army to direct and track the movements of reconnaissance aircraft. Over time, the AMRS morphed into flight service stations. Today's flight service stations do not issue control instructions, but provide pilots with many other flight related informational services.
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