surfacegamma
Gamma value for different terrains
Syntax
G = surfacegamma(TerrainType)
G = surfacegamma(TerrainType,FREQ)
surfacegamma
Description
returns the value for the specified terrain. The value is for an operating frequency of 10 GHz.G
= surfacegamma(TerrainType
)
specifies
the operating frequency of the system.G
= surfacegamma(TerrainType
,FREQ
)
surfacegamma
displays several terrain types and their corresponding values. These values are for an operating frequency of 10 GHz.
Input Arguments
|
Character vectors that describe the terrain type. Valid values are:
|
|
Operating frequency of radar system in hertz. This value can be a scalar or vector. Default: |
Output Arguments
|
Value of in decibels, for constant clutter model. |
Examples
More About
Algorithms
The values for the terrain types 'sea state 3'
,
'sea state 5'
, 'woods'
,
'metropolitan'
, and 'rugged mountain'
are from
[2].
The values for the terrain types 'farmland'
,
'wooded hill'
, and 'flatland'
are from [3].
Measurements provide values of for a system operating at 10 GHz. The value for a system operating at frequency f is:
where is the value at frequency f0 = 10 GHz.
References
[1] Barton, David. “Land Clutter Models for Radar Design and Analysis,” Proceedings of the IEEE. Vol. 73, Number 2, February, 1985, pp. 198–204.
[2] Long, Maurice W. Radar Reflectivity of Land and Sea, 3rd Ed. Boston: Artech House, 2001.
[3] Nathanson, Fred E., J. Patrick Reilly, and Marvin N. Cohen. Radar Design Principles, 2nd Ed. Mendham, NJ: SciTech Publishing, 1999.