Grazing angle of surface target
grazAng = grazingang(H,R)
grazAng = grazingang(H,R,MODEL)
grazAng = grazingang(H,R,MODEL,Re)
the grazing angle for a sensor
grazAng = grazingang(
H meters above
the surface, to surface targets
R meters away.
The computation assumes a curved earth model with an effective earth
radius of approximately 4/3 times the actual earth radius.
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 requires a positive scalar value.
Grazing angle, in degrees. The size of
Determine the grazing angle (in degrees) of a path to a ground target located 1.0 km from a sensor. The sensor is mounted on a platform that is 300 m above the ground.
grazAng = grazingang(300,1.0e3)
grazAng = 17.4544
The grazing angle is the angle between a line from the sensor to a surface target, and a tangent to the earth at the site of that target.
For the curved earth model with an effective earth radius of Re, the grazing angle is:
For the flat earth model, the grazing 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.