Package index • bioRad

Reading radar data

Functions to read polar volume (pvol) data.

download_pvolfiles(): Download polar volume (pvol) files from the NEXRAD archive
is.pvolfile(): Check if a file is a polar volume (pvol)
read_pvolfile(): Read a polar volume (pvol) from file
write_pvolfile(): Write a polar volume (pvol) object to ODIM HDF5 file
get_iris_raw_task(): Check the task type of an IRIS RAW file
get_odim_object_type(): Check the data type of an ODIM HDF5 file
nexrad_to_odim(): Convert a NEXRAD polar volume file to an ODIM polar volume file
get_elevation_angles(): Get elevation angles of a polar volume (pvol), scan (scan) or parameter (param)
summary(<pvol>) print(<pvol>) is.pvol() dim(<pvol>): Inspect a polar volume (pvol)
select(<scan>) select(<pvol>): Tidyverse methods for bioRad objects

Functions to inspect and plot a polar scan (scan) from a polar volume (pvol).

example_scan: Scan (scan) example
get_elevation_angles(): Get elevation angles of a polar volume (pvol), scan (scan) or parameter (param)
get_scan(): Get a scan (scan) from a polar volume (pvol)
plot(<scan>): Plot a scan (scan) in polar coordinates
summary(<scan>) print(<scan>) is.scan() dim(<scan>): Inspect a scan (scan)
select(<scan>) select(<pvol>): Tidyverse methods for bioRad objects
get_param(): Get a parameter (param) from a scan (scan)
summary(<param>) print(<param>) is.param(): Inspect a parameter (param)

Functions to manipulate radar images (scan, param, ppi) and to identify precipitation.

add_param(): Add scan parameter from a georeferenced raster.
apply_mistnet(): Apply MistNet segmentation to a polar volume
calculate_param(): Calculate a new scan parameter
Math(<scan>) Math(<pvol>) Ops(<param>) Ops(<scan>) Ops(<pvol>): Mathematical and arithmetic operations on param's, scan's and pvol's

Functions to plot a polar volume (pvol), scan (scan) or parameter (param) on a grid or basemap as a plan position indicator (ppi).

project_as_ppi(): Project a scan (scan) or parameter (param) to a plan position indicator (ppi)
composite_ppi(): Create a composite of multiple plan position indicators (ppi)
integrate_to_ppi(): Calculate a plan position indicator (ppi) of vertically integrated density adjusted for range effects
map(): Map a plan position indicator (ppi) on a map
plot(<ppi>): Plot a plan position indicator (ppi)
`[`(<ppi>): Subset a plan position indicator (ppi)
summary(<ppi>) print(<ppi>) is.ppi() dim(<ppi>): Inspect a plan position indicator (ppi)
scan_to_raster(): Convert a polar scan into a raster
scan_to_spatial(): Convert a polar scan into a spatial object.

Functions to process weather radar data (pvol) into vertical profiles (vp) of biological targets.

calculate_vp(): Calculate a vertical profile (vp) from a polar volume (pvol) file

Functions to download, read, inspect and plot vertical profile (vp) data.

download_vpfiles() superseded: Download vertical profile (vp) files from the ENRAM data repository
is.vpfile(): Check if a file is a vertical profile (vp)
list_vpts_aloft() superseded: List aloft urls for time series of vertical profiles (vpts) of radar stations
read_cajun(): Read a vertical profile (vp) from UMASS Cajun text file
read_vpfiles(): Read a vertical profile (vp) or a list of vertical profiles (vp) from files
read_vpts(): Read time series of vertical profiles (vpts) from file(s)
select_vpfiles(): Select vertical profile (vp) files from computer

Functions to inspect and plot a vertical profiles (vp) and time series (vpts).

example_vp: Vertical profile (vp) example
get_quantity(): Get a quantity from a vertical profile (vp) or time series of vertical profiles (vpts)
plot(<vp>): Plot a vertical profile (vp)
summary(<vp>) print(<vp>) is.vp() dim(<vp>): Inspect a vertical profile (vp)
example_vpts: Time series of vertical profiles (vpts) example
plot(<vpts>): Plot a time series of vertical profiles (vpts)
`[`(<vpts>): Subset a time series of vertical profiles (vpts)
summary(<vpts>) print(<vpts>) is.vpts() dim(<vpts>): Inspect a time series of vertical profiles (vpts)

Functions to combine vertical profiles (vp) into time series (vpts) and to post-process these.

bind_into_vpts(): Bind vertical profiles (vp) into time series (vpts)
c(<vp>): Concatenate vertical profiles (vp) into a list of vertical profiles
clean_mixture(): Partition mixtures of animals using assumptions on airspeeds.
filter_precip(): Posthoc precipitation filter
filter_vpts(): Filter a time series of vertical profiles ('vpts').
`rcs<-`(): Set radar cross section
regularize_vpts(): Regularize a time series of vertical profiles (vpts) on a regular time grid
`sd_vvp_threshold<-`(): Set threshold of the radial velocity standard deviation
as.data.frame(<vp>) as.data.frame(<vpts>): Convert a vertical profile (vp) or time series of vertical profiles (vpts) to a data frame
as.vp(): Convert a dataframe into a vp object
as.vpts(): Convert a dataframe into a vpts object

Functions to calculate e.g. the migration traffic rate (MTR) by vertically integrating profiles (vp or vpts) into an integrated profile (vpi).

integrate_profile(): Vertically integrate profiles (vp or vpts) into an integrated profile (vpi)
plot(<vpi>): Plot an integrated profile (vpi)
summary(<vpi>) is.vpi(): Inspect an integrated profile (vpi)

Functions to access metadata of vertical profiles (vp), time series (vpts) or integrated profiles (vpi).

attribute_table(): Extract a volume coverage pattern table with all attributes
check_night(): Check if it is night at a given time and place
doy() noy(): Look up day of year (doy) or night of year (noy)
rcs(): Get radar cross section
sd_vvp_threshold(): Get threshold of the radial velocity standard deviation

Functions relating the radar beam shape to range, distance and height.

beam_distance(): Calculate radar beam distance
beam_height(): Calculate radar beam height
beam_profile(): Calculate vertical radiation profile
beam_profile_overlap(): Calculate overlap between a vertical profile ('vp') and the vertical radiation profile emitted by the radar
beam_range(): Calculate radar beam range
beam_width(): Calculate radar beam width

Other useful functions.

convert_legacy(): Convert legacy bioRad objects
dbz_to_eta(): Convert reflectivity factor (dBZ) to reflectivity (eta)
eta_to_dbz(): Convert reflectivity (eta) to reflectivity factor (dBZ)
nyquist_velocity(): Calculate Nyquist velocity for a given pulse repetition frequency (PRF)
sunrise() sunset(): Calculate sunrise or sunset for a time and place