# angle

Angle between sites

## Description

example

[az,el] = angle(site1,site2) returns the azimuth and elevation angles between site 1 and site

example

[az,el] = angle(site1,site2,path) returns the angles using a specified path type, either Euclidean or great circle path.

[az,el] = angle(___,Name,Value) returns the azimuth and elevation angles with additional options specified by name-value pairs.

## Examples

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tx = txsite('Name','MathWorks','Latitude',42.3001,'Longitude',-71.3504);
rx = rxsite('Name','Fenway Park','Latitude',42.3467,'Longitude',-71.0972);

Get the azimuth and elevation angles between the sites.

[az,el] = angle(tx,rx)
az = 14.0142
el = -0.2816

Get the azimuth angle between sites in degrees clockwise from north.

azFromEast = angle(tx,rx); % Unit: degrees counter-clockwise from east
azFromNorth = -azFromEast + 90 % Convert angle to clockwise from north
azFromNorth = 75.9858

tx = txsite('Name','MathWorks','Latitude',42.3001,'Longitude',-71.3504);
rx = rxsite('Name','Fenway Park','Latitude',42.3467,'Longitude',-71.0972);

Get the azimuth and elevation angles between the sites.

[az,el] = angle(tx,rx,'greatcircle')
az = 14.0635
el = 0

## Input Arguments

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Transmitter or receiver site, specified as a txsite or rxsite object. You can use array inputs to specify multiple sites.

Measurement path type, specified as one of the following:

• 'euclidean': Uses the shortest path through space connecting the antenna center positions of the site 1 and site 2.

• 'greatcircle': Uses the shortest path on the surface of the earth connecting the latitude and longitude locations of site 1 and site 2. This path uses a spherical Earth model.

Data Types: char

### Name-Value Pair Arguments

Specify optional comma-separated pairs of Name,Value arguments. Name is the argument name and Value is the corresponding value. Name must appear inside quotes. You can specify several name and value pair arguments in any order as Name1,Value1,...,NameN,ValueN.

Example: 'Map','siteviewer1'

Map for visualization or surface data, specified as the comma-separated pair consisting of 'Map and one of the following depending on the coordinate system:

Coordinate SystemValid map valuesDefault map value
'geographic'
• A terrain name may be specified if the function is called with an output argument. Valid terrain names are 'none', 'gmted2010', or the name of the custom terrain data added using addCustomTerrain

• current siteviewer or new siteviewer if none are open.

• 'gmted2010' if called with an output.

'cartesian''none', triangulation object or name of an STL file.'none'

[a] Alignment of boundaries and region labels are a presentation of the feature provided by the data vendors and do not imply endorsement by MathWorks®.

Data Types: char | string

## Output Arguments

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Azimuth angle between site 1 and site 2, returned as M-by-N arrays in degrees. M is the number of sites in sites 2 and N is the number of sites in sites 1. The azimuth angle is expressed in degrees counter-clockwise from the east (for geographic sites), or from the global x-axis around the global z-axis (for Cartesian sites), ranging from -180 to 180

Elevation angle between site 1 and site 2, returned as M-by-N arrays in degrees. M is the number of sites in sites 2 and N is the number of sites in sites 1 The elevation angle is expressed in degrees from the horizontal (or X-Y) plane, ranging from -90 to 90.

When the path type specified is 'greatcircle', elevation angle is always zero.

Introduced in R2017b