bioRad (version 0.5.1)

plot.scan: Plot a scan (scan) in polar coordinates

Description

Plots a scan in polar coordinates. For plots in Cartesian coordinates, see ppi

Usage

# S3 method for scan
plot(
  x,
  param,
  xlim = c(0, 1e+05),
  ylim = c(0, 360),
  zlim = c(-20, 20),
  na.value = "transparent",
  ...
)

Arguments

x

An object of class scan.

param

The scan parameter to plot, see details below.

xlim

Range of x (range, distance from radar) values to plot.

ylim

Range of y (azimuth) values to plot.

zlim

The range of parameter values to plot.

na.value

ggplot argument setting the plot color of NA values

...

Arguments passed to low level ggplot function.

Details

Available scan parameters for plotting can by printed to screen by summary(x). Commonly available parameters are:

"DBZH", "DBZ"

(Logged) reflectivity factor [dBZ]

"TH", "T"

(Logged) uncorrected reflectivity factor [dBZ]

"VRADH", "VRAD"

Radial velocity [m/s]. Radial velocities towards the radar are negative, while radial velocities away from the radar are positive

"RHOHV"

Correlation coefficient [unitless]. Correlation between vertically polarized and horizontally polarized reflectivity factor

"PHIDP"

Differential phase [degrees]

"ZDR"

(Logged) differential reflectivity [dB]

The scan parameters are named according to the OPERA data information model (ODIM), see Table 16 in the ODIM specification.

Examples

# NOT RUN {
# load an example scan:
data(example_scan)

# print to screen the available scan parameters
summary(example_scan)

# make ppi for the scan
# plot the reflectivity param:
plot(example_scan, param = "DBZH")
# }
# NOT RUN {
# change the range of reflectivities to plot, from -10 to 10 dBZ:
plot(example_scan, param = "DBZH", zlim = c(-10, 10))

# change the scale name and colour scheme, using viridis colors:
plot(example_scan, param = "DBZH", zlim = c(-10, 10)) + viridis::scale_fill_viridis(name = "dBZ")
# }