pyart.io.nexrad_level2.NEXRADLevel2File

class pyart.io.nexrad_level2.NEXRADLevel2File(filename, bzip=False)

Class for accessing data in a NEXRAD (WSR-88D) Level II file.

NEXRAD Level II files [R7], also know as NEXRAD Archive Level II or WSR-88D Archive level 2, are available from the NOAA National Climate Data Center [R8] as well as on the UCAR THREDDS Data Server [R9]. Files with uncompressed messages and compressed messages are supported. Currently only “message 31” type files are supported, “message 1” file cannot be read using this class.

Parameters :

filename : str

Filename of Archive II file to read.

bzip : bool

True if the file is a compressed bzip2 file.

References

[R7]	(1, 2) http://www.roc.noaa.gov/WSR88D/Level_II/Level2Info.aspx

[R8]	(1, 2) http://www.ncdc.noaa.gov/

[R9]	(1, 2) http://thredds.ucar.edu/thredds/catalog.html

Attributes

msg31s	(list) Message 31 message in the file.
nscans	(int) Number of scans in the file.
scan_msgs	(list of arrays) Each element specifies the indices of the message in msg31s which belong to a given scan.
volume_header	(dict) Volume header.
vcp	(dict) VCP information dictionary.
_records	(list) A list of all records (message) in the file.

Methods

get_azimuth_angles([scans])	Retrieve the azimuth angles of all rays in the requested scans.
get_data(moment, max_ngates[, scans, raw_data])	Retrieve moment data for a given set of scans.
get_elevation_angles([scans])	Retrieve the elevation angles of all rays in the requested scans.
get_nrays(scan)	Return the number of rays in a given scan.
get_range(scan_num, moment)	Return an array of gate ranges for a given scan and moment.
get_target_angles([scans])	Retrieve the target elevation angle of the requested scans.
get_times([scans])	Retrieve the times at which the rays were collected.
location()	Find the location of the radar.
scan_info()	Return a list of dictionaries with scan information.

Private methods

__init__(filename[, bzip])	initalize the object.
_msg31_array(scans, key)	Return an array of msg31 header elements for all rays in scans.
_msg_nums(scans)	Find the all message number for a list of scans.