Various sensors covering magnetic, low frequency electromagnetic, VHF,
microwave, and wideband radars are used for electromagnetic remote sensing.
The stereo vision system uses two cameras to create a
stereo image from airborne or satellite-borne platforms.
Gamma ray detectors on airborne platforms detect and map
nuclear debris on the ground.
ELF/VLF Remote Sensing
Sensitive magnetometers and electromagnetic sensors are used
for detection, tracking, and characterization of non co-operative
targets hidden under cavities, in tunnels, and inside buildings.
Electromagnetic modeling tools let us predict the detection capabilities
under any conditions and for different frequencies (Electromagnetics Modeling for Underground Objects). The sensitive
fluxgate and induction coil magnetometers allow implementation
in different situations. The sensors telemeter data via
radio links to the system, which processes it to eliminate
background noise, clutter, and other impurities, (Magnetic Array) then tracks and characterizes it.
Radar Remote Sensing
Other UWB radars and coded radars perform remote sensing
under different conditions (examples include inside buildings,
underground, in various free space conditions, and long-distance
via the ionosphere). Such technologies as signal processing
modules and hardware modules are available covering frequencies
from ELF to microwaves.
