Range Angle Calculator
Range and angle calculations
 Library:
Phased Array System Toolbox / Environment and Target
Description
The Range Angle Calculator block calculates the range and/or the azimuth and elevation angles of several positions with respect to a reference position and with respect to a reference axes orientation. The reference position and reference axes can be specified in the block dialog or passed in through input ports.
Ports
Input
Pos
— Source point position
realvalued 3by1 vector  realvalued 3byN matrix
Source point position, specified as a realvalued 3by1 vector or a realvalued
3byN matrix where N is the
number of source points. Each column contains the Cartesian coordinates
of a point in the form [x;y;z]
.
When Pos
is a 3byN matrix, you must specify
RefPos
as a 3byN matrix
for N reference positions. If all the reference
points are identical, you can specify RefPos
by a
single 3by1 vector. Units are in meters.
Example: [1000;2000;50]
Data Types: double
RefPos
— Reference point position
[0;0;0]
(default)  realvalued 3by1 vector  realvalued 3byN matrix
Reference point position, specified as a realvalued 3by1 vector or a realvalued
3byN matrix where N is the
number of reference points. Each column contains the Cartesian
coordinates of point in the form [x;y;z]
.
When RefPos
is a 3byN matrix, you must specify
Pos
as a 3byN matrix for
N source positions. If all the source points are
identical, you can specify Pos
by a single 3by1
vector. Reference position units are meters.
Example: [100;100;10]
Dependencies
To enable this port, set the Reference position source drop down
menu to Input port
.
Data Types: double
RefAxes
— Local coordinate system axes
[1 0 0;0 1 0;0 0 1]
(default)  realvalued 3by3 vector  realvalued 3by3byN array
Local coordinate system axes, specified as a realvalued 3by3 matrix or a
3by3byN array. For an array, each page
corresponds to a local coordinate axes at each reference point. The
columns in RefAxes
specify the direction of the
coordinate axes for the local coordinate system in Cartesian
coordinates. N must match the number of columns in
Pos
or RefPos
when these
dimensions are greater than one.
Example: [100;100;10]
Dependencies
To enable this port, set the Reference axes source drop down menu
to Input port
.
Data Types: double
Output
Ang
— Azimuth and elevation angles
realvalued 2byN matrix  realvalued 2by2N matrix
Azimuth and elevation angles in degrees, returned as a 2byN matrix or 2by2N matrix. Each column represents a direction angle in the form [azimuth;elevation].
When Propagation model is set to Free
space, Ang
is a
2byN matrix and represents the angle of the
path from a source point to a reference point.
When Propagation model is set to
Tworay, Ang
is a
2by2N matrix. Alternate columns of
Ang
refer to the lineofsight path and
reflected path, respectively.
Dependencies
To enable this port, set the Output(s) drop down menu to
Angle
or Range and
Angle
.
Data Types: double
Range
— Propagation range
realvalued 1byN vector  realvalued 1by2N vector
Propagation range, returned as a realvalued 1byN vector or realvalued 1by2N vector.
When Propagation model is set to Free
space, the size of Range is
1byN. The propagation range is the length of
the direct path from the position defined in Pos
to
the corresponding reference position defined in
RefPos
.
When Propagation model is set to Tworay, Range contains the ranges for the direct path and the reflected path. Alternate columns of Range refer to the lineofsight path and reflected path, respectively for the same sourcereference point pair.
Dependencies
To enable this port, set the Output(s) drop down menu to
Range
or Range and
Angle
.
Data Types: double
Parameters
Propagation model
— Propagation model
Free space
(default)  Tworay
Specify the propagation model by setting this parameter to
Free space
or
Tworay
.
Reference position source
— Reference position source
Property
(default)  Input port
Specify the reference position source by setting this parameter to
Property
or Input
port
. If Reference position source is
set to Property
, set the position using the
Reference position parameter. If
Reference position source is set to
Input port
, use the input port labeled
RefPos
.
Reference position
— Reference position
[0;0;0]
(default)
Specify the reference position as a 3by1 vector of rectangular
coordinates in meters in the form [x;y;z]
. The reference
position serves as the origin of the local coordinate system. Ranges and
angles of the input positions are measured with respect to the reference
position. This parameter appears only when Reference position
source is set to Property
.
Reference axes source
— Reference axes source
Property
(default)  Input port
Specify the reference axes source by setting this parameter to
Property
or Input port
. If
Reference axes source is set to
Property
, set the axes using the Reference
axes parameter. If Reference axes source
is set to Input port
, use the input port labeled
RefAxes
.
Reference axes
— Reference axes
eye(3)
Specify the reference axes of the local coordinate system with which to
calculate range and angles in the form of a 3by3 orthonormal matrix. Each
column of the matrix specifies the direction of an axis for the local
coordinate system in the form of [x; y; z]
with origin at
the reference position. This parameter appears only when Reference
axes source is set to Property
.
Output(s)
— Output(s)
Angle
(default)  Range
 Range and Angle
Specify the desired output(s) of the block. Each type of output is sent to a different port depending on the parameter value.
Value  Port 

Angle

Ang

Range

Range

Range and Angle

Ang and Range

Simulate using
— Block simulation method
Interpreted Execution
(default)  Code Generation
Block simulation, specified as Interpreted Execution
or
Code Generation
. If you want your block to use the
MATLAB^{®} interpreter, choose Interpreted Execution
. If
you want your block to run as compiled code, choose Code
Generation
. Compiled code requires time to compile but usually runs
faster.
Interpreted execution is useful when you are developing and tuning a model. The block
runs the underlying System object™ in MATLAB. You can change and execute your model quickly. When you are satisfied
with your results, you can then run the block using Code
Generation
. Long simulations run faster with generated code than in
interpreted execution. You can run repeated executions without recompiling, but if you
change any block parameters, then the block automatically recompiles before
execution.
This table shows how the Simulate using parameter affects the overall simulation behavior.
When the Simulink^{®} model is in Accelerator
mode, the block mode specified
using Simulate using overrides the simulation mode.
Acceleration Modes
Block Simulation  Simulation Behavior  
Normal  Accelerator  Rapid Accelerator  
Interpreted Execution  The block executes using the MATLAB interpreter.  The block executes using the MATLAB interpreter.  Creates a standalone executable from the model. 
Code Generation  The block is compiled.  All blocks in the model are compiled. 
For more information, see Choosing a Simulation Mode (Simulink).
Version History
Introduced in R2014b
See Also
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