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Vertical coverage diagram

```
[vcp,vcpangles]
= radarvcd(freq,rfs,anht)
```

```
[vcp,vcpangles]
= radarvcd(___,Name,Value)
```

`radarvcd(___)`

`[`

calculates
the vertical coverage pattern of a narrowband radar antenna. The Vertical Coverage Pattern is the radar’s
range, `vcp`

,`vcpangles`

]
= radarvcd(`freq`

,`rfs`

,`anht`

)`vcp`

, as a function of elevation angle, `vcpangles`

.
The vertical coverage pattern depends upon three parameters. These
parameters are the radar’s maximum free-space detection range, `rfs`

,
the radar frequency, `freq`

, and the antenna height, `anht`

.

`radarvcd(___)`

displays the
vertical coverage diagram for a radar system. The plot is the locus
of points ofmaximum radar range as a function of target elevation.
This plot is also known as the *Blake chart*.
To create this chart, `radarvcd`

invokes the function `blakechart`

using default parameters.
To produce a Blake chart with different parameters, first call `radarvcd`

to
obtain `vcp`

and `vcpangles`

.
Then, call `blakechart`

with user-specified parameters.
This syntax can use any of the input arguments in the previous syntaxes.

[1] Blake, L.V. *Machine Plotting
of Radar Vertical-Plane Coverage Diagrams*. Naval Research
Laboratory Report 7098, 1970.

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