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Radar cross-section (RCS), denoted σ, also called radar signature, is a measure of how detectable an object is by radar. A larger RCS indicates that an object is more easily detected. A larger RCS indicates that an object is more easily detected.
Optical cross section (OCS) is a value which describes the maximum amount of optical flux reflected back to the source. [1] The standard unit of measurement is m 2 /sr. OCS is dependent on the geometry and the reflectivity at a particular wavelength of an object. Optical cross section is useful in fields such as LIDAR.
The radar frequency is also chosen in order to optimize the radar cross-section (RCS) of the envisioned target, which is frequency-dependent. Examples of propagation windows are the 3 GHz (S), 10 GHz (X), 24 GHz (K), 35 GHz (Ka), 77 GHz (W), 94 GHz (W) propagation windows.
When it is exactly zero the radar is a monostatic radar, when it is close to zero the radar is pseudo-monostatic, and when it is close to 180 degrees the radar is a forward scatter radar. Elsewhere, the radar is simply described as a bistatic radar. The bistatic angle is an important factor in determining the radar cross section of the target.
Helendale Avionics Facility or Lockheed Helendale Radar Cross Section Facility or Helendale Measurement Facility was built in 1983 by Lockheed Martin Skunk Works, who closed and took over the Helendale Airport. Lockheed built a radar cross-section testing facility at the site.
The cross-section is the minimum apparent surface area observed in the direction of the radar that must be detectable.. Radar cross section changes with aspect angle. Cross section for anything except a perfect sphere depends upon the aspect angle, which how far the reflector is rotated with respect to the radar pulse.
σ = radar cross section, or scattering coefficient, of the target; F = pattern propagation factor; R t = distance from the transmitter to the target; R r = distance from the target to the receiver. In the common case where the transmitter and the receiver are at the same location, R t = R r and the term R t ² R r ² can be replaced by R 4 ...
National Radar Cross Section Test Facility; The National Radar Cross Section Test Facility (NRTF) is the DoD facility for RCS testing. Formerly known as RATSCAT, which began measuring radar scattering in 1963, it comprises two complementary sites, Main site and RATSCAT Advanced Measurement System (RAMS).