Depression angle of surface target
depAng = depressionang(H,R)
depAng = depressionang(ht,r,MODEL)
depAng = depressionang(H,R,MODEL,Re)
depAng = depressionang(___,'TargetHeight',TGTHT)
returns the depression angle from the horizontal at an altitude of
depAng = depressionang(
meters to surface targets. The sensor is
H meters above the surface.
R is the range from the sensor to the surface targets. The computation
assumes a curved earth model with an effective earth radius of approximately 4/3 times the
actual earth radius.
specifies the target height,
depAng = depressionang(___,
TGTHT above the surface as either a scalar
or a vector. If any combination of
TGTHT are vectors, then the dimensions must be equal.
r must be greater than or equal to the absolute value of the difference
Height of the sensor above the surface, in meters. This argument can be a scalar
or a vector. If both
Distance in meters from the sensor to the surface target. This argument can be a
scalar or a vector. If both
Earth model, as one of |
Effective earth radius in meters. This argument must be a positive scalar value. You can used
Target height above surface, specified as a scalar or vector. If any combination
Depression angle, in degrees, from the horizontal at the sensor altitude toward
Calculate the depression angle for a ground clutter patch that is 1.0 km away from a sensor. The sensor is located on a platform 300 m above the ground.
depang = depressionang(300,1000)
depang = 17.4608
The depression angle is the angle between a horizontal line containing the sensor and the line from the sensor to a surface target.
For the curved earth model with an effective earth radius of Re, the depression angle is:
For the flat earth model, the depression angle is:
 Long, Maurice W. Radar Reflectivity of Land and Sea, 3rd Ed. Boston: Artech House, 2001.
 Ward, J. “Space-Time Adaptive Processing for Airborne Radar Data Systems,” Technical Report 1015, MIT Lincoln Laboratory, December, 1994.
Usage notes and limitations:
Does not support variable-size inputs.